Mr. T. D. A. CockereU's Notes on Slugs. 385 



Described from two alcoholic specimens in the British 

 Museum, collected in Formosa and presented by Matthew 

 Dickson. 



I was at first inclined to regard this as a geographical race 

 of confusa [ = hilineata^ auctt., non Bens.) (which has been 

 recorded from Formosa *) , and as I have not examined the 

 jaw, I cannot jet be certain whether it belongs with that species 

 or true hilineata. However, hilineata is found in tlie Chusan 

 Islands ; so it becomes highly probable that the Formosa form 

 has a ribbed jaw and is allied thereto. 



L. formosensis differs externally from confiisa in its colour 

 and markings, but resembles it in its tuberculose sole. L. 

 formosensis compared with the Chusan hilineata does not 

 seem specifically different so far as external characters go. 



Limacella campestris (Godw.-Aust.) . 



Limacella hilineata, subsp. 



Philomycus {Incillaria) campestris, Godw.-Aust. Journ. As. Soc. Beng. 

 xlv. pt. 2, p. 315, pi. viii. fig. 3 (1876). 



Ochraceous yellow, with an obscure dorsal and lateral pale 

 brown bands, narrow and more or less interrupted. Sole 

 finely laterally transversely wrinkled. Length 23 millim., 

 respiratory orifice 4 millim. from anterior border of mantle ; 

 sole 4 millim. broad. 



Shape of slug cylindrical, tapering posteriorly. Jaw pale, 

 ribbed. 



Differs from confusa in its non- tuberculose sole and 

 different markings and its ribbed jaw. 



Described from five specimens in the British Museum from 

 Dukhun (Co/. Syhes). 



Although Godwin-Austen gives but a short description 

 and rather indifferent figure of his type of campestris from 

 Kholabari, and says nothing about the jaw, I think there can 

 be no reason for considering our Dukhun form distinct 

 from campestris^ since, so far as we know, there is not any 

 im])ortant difference between them. Should the type of cam- 

 pestris be found later on not to have a ribbed jaw, it will be 

 time to propose a new subspecific name for the slugs described 

 above. The discovery of a group of Limacella with ribbed jaw 

 in Asia is very interesting and tends to endorse the opinion 

 that this is not a generic character. 



* See Heyaemann, 'Die nackteu Landpulmoiiaten des Erdbodens,' 

 1885, p. 66. 



Ann. & Mag. N. Hist. Ser. 6. Vol. vi. 28 



