GUDE : LIST OF HELICOID LAND SHELLS. II 



trisinuata, Mts. Kwang-tung. biscalpta, Hde. Sze-chuen. 



V. sculptilis, Mdff. Species of uncertain position. 



hensaniensis, Gredl. Hu-nan. Helix keratina, Hde. Kwang-si. 

 erdmanni, Schm. and Bttgr. ,, ostreola, Hde. Kwang-si. 



faberiana, Mdff. Sze-chuen. ,, Jacob, Gredl. Hu-pe. 



ON THE ANATOMY OF THE GENUS 

 MYOTESTA, CLLGE. 



By WALTER E. COLLIXGE. 



(Plate i.) 



The genus Myotesta was established in 1901 ^ for the reception of two 



interesting slug-like molluscs, received from and collected by, Mr. H. 



Fruhstorfer of Berlin, in Tonkin. 



On further examination, the anatomical characters and general 

 structure prove so very different from any known family of pulmonates, 

 that it has been considered expedient to propose for the reception of 

 this interesting genus a new family, to which the name Myoteatidae is 

 given. 



Until more material is obtained, and the form and structure of 

 the pallial organs, free muscles, and digestive system are worked out, 

 it is not possible to say with any certainty, what relations this peculiar 

 family has to other families of slug-like molluscs. The material at my 

 disposal has not enabled me to investigate satisfactorily these organs, 

 but I am able to give details of the generative organs and a general 

 description of others. 



MYOTESTIDAE, n. fam. 

 Myotesta, Cilge. 

 Myotesta, Cllge. : Journ. of Malac, 1901, vol. vii., p. 118. 

 Animal slug-like, with the mantle conspicuously elevated into a non- 

 spiral visceral hump, and completely enclosing a flat, somewhat ovoid, 

 non-spiral, plate-like shell. Dorsum posteriorly sharply keeled, 

 Respiratory orifice in front of the middle of right margin of mantle. 

 Generative orifice below and immediately behind the right upper 

 tentacles. The foot-fringe is continued posteriorly to form the 

 overhanging caudal lobe. Caudal mucous pore. Foot-sole narrow, 

 divided into median and lateral planes. Viscera elevated into a non- 

 spiral dorsal hump, and posteriorly lying in a triangular depression of 

 the dorsum. Body-cavity not extending into the tail portion, which 

 is solid. 



J, Journ. of Malac , igoi, vol. viii, p. ii8. 



