（音偃。《别录》下品）
【释名】田鼠（《礼记》）、鼢鼠（音愤）、
时珍曰∶田鼠偃行地中，能壅土成坌，故得诸名。
【集解】《别录》曰∶鼹鼠在土中行。五月取令干，燔之。
弘景曰∶此即鼢鼠也，一名隐鼠。形如鼠大，而无尾黑色，尖鼻甚强，常穿地中行，讨
掘即得。今山林中别有大如水牛者，一名隐鼠。
藏器曰∶隐鼠，阴穿地中而行，见日月光则死，于深山林木下土中有之。其大如牛者，
名同物异耳。
颂曰∶处处田垄间多有之。《月令》田鼠化为 者即此。其形类鼠而肥，多膏。旱岁为
田害。
宗 曰∶鼹，脚绝短，但能行。尾长寸许，目极小，项尤短。最易取，或安竹弓射取饲
鹰。陶引如水牛者释之，误矣。
时珍曰∶许慎言鼢乃伯劳所化。《月令》季春田鼠化为 ，《夏小正》八月 为鼠，是二
物交化，如鹰、鸠然也。 乃鹑类。隆庆辛未夏秋大水，蕲、黄濒江之地，鼢鼠遍野，皆栉
鱼所化。芦稼之根，啮食殆尽，则鼢之化，不独一种也。
肉
【气味】咸，寒，无毒。
【主治】燔之，疗痈疽、诸 蚀恶疮、阴 烂疮（《别录》）。
久食去风，主疮疥痔 （藏器）。治风热久积，血脉不行，结成痈疽，食之可消。又小
儿食之，杀蛔虫（苏颂）。
膏
【主治】摩诸恶疮（藏器）。
粪
【主治】蛇虺螫伤肿痛，研末，猪脂调涂（时珍）。
壤土 见土部。
(Pronounced "Yan". Recorded in the Lower Category of *Bie Lu* [Separate Record].)
[Names] Field Mouse (from *Li Ji* [Book of Rites]), Fen Shu (Pinyin: Fén Shǔ, meaning "Fen Mouse", pronounced "Fèn").
Shizhen said: The field mouse moves underground in a prone position and can pile up soil to form mounds; hence it derives these names.
[Collected Explanations] *Bie Lu* states: Yan Shu lives and moves within the soil. It is collected in the fifth month, dried, and then roasted/burned.
Hongjing said: This is the Fen Shu, also known as Yin Shu (Hidden Mouse). Its shape resembles a large mouse but lacks a tail; it is black with a sharp, strong nose, and often travels through the ground, where it can be found by digging. Currently, there is another creature in the mountains and forests that is as large as a water buffalo, also called Yin Shu.
Cangqi said: Yin Shu moves underground in darkness and dies upon exposure to sunlight or moonlight; it is found in the soil under deep forest trees. Those as large as cattle are merely sharing the name but are different species.
Song said: They are abundant in field ridges everywhere. What *Yue Ling* [Monthly Ordinances] refers to as "field mice transforming into Ru" [a type of bird] is this animal. Its shape resembles a mouse but is fat and rich in grease. In drought years, it becomes a pest to fields.
Zong said: Yan Shu has extremely short feet and can only walk. Its tail is about one cun long, its eyes are very small, and its neck is particularly short. It is easiest to catch; some set bamboo bows to shoot them for feeding to eagles. Tao Hongjing's citation of the water-buffalo-sized creature as an explanation was erroneous.
Shizhen said: Xu Shen stated that Fen Shu transforms from the Shrike (*Bolao*). *Yue Ling* states that in late spring, field mice transform into Ru, while *Xia Xiao Zheng* [Small Calendar of Summer] states that in August, Ru transforms into mice. This indicates mutual transformation between two species, similar to how hawks transform into turtledoves. Ru belongs to the quail family. During the summer and autumn floods of the Xinwei year of Longqing, Fen Shu were ubiquitous along the rivers in Qizhou and Huangzhou, all having transformed from fish. The roots of reeds and crops were gnawed away almost completely, indicating that the transformation of Fen Shu does not originate from just one source.
[Meat]
[Properties and Flavors] Salty, cold, non-toxic.
[Indications] When roasted/burned, it treats carbuncles and sores, various corrosive malignant ulcers, and ulcerating sores in the genital area (*Bie Lu*).
Long-term consumption dispels wind and primarily treats skin sores, scabies, and hemorrhoids (Cangqi). It treats chronic accumulation of wind-heat causing stagnation of blood vessels, which condenses into carbuncles and sores; consumption can resolve them. Additionally, when consumed by children, it kills roundworms (Su Song).
[Paste/Ointment]
[Indications] Applied topically to treat various malignant ulcers (Cangqi).
[Feces]
[Indications] Treats swelling and pain caused by viper bites; grind into powder and mix with lard for topical application (Shizhen).
[Loam/Soil] See the section on Earth.