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DESCRIPTION OF SOME NEW SPECIES OF SLUGS 

 COLLECTED BY MR. H. FRUHSTORFER. 



Pa' WALTER E. COLLINGE. 



I HAVE recently received from Mr. H. Fruhstorfer of Berlin an 

 interesting collection of slugs made by him in Japan, Tonkin, and 

 Annam, and as it will be some time before I can complete the descrip- 

 tions and figures of their internal anatomy, at his request I am now 

 describing the new species. A detailed account of the anatomy 

 together with coloured figures of the animals is in active preparation. 



MYOTESTA, n. gen. 



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

 non-spiral visceral hump, and completely enclosing a flat, 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 tentacle. 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, fjody- 

 cavity not extending into the tail-portion, which is solid. 



Jaw crescentic, with lo broad ribs, slightly denticulating the basal 

 margin. 



Generative system with well develoj)ed penis, passing into an 

 epiphallus. Receptacular duct long. No dart-gland or dart-sac. 



Myotesta fpuhstorferi, n. sp. 



Animal yellowish-brown, with blue mottling ; head and tentacles 

 blue ; mantle, ground colour same as the body with faint, net-like, 

 brown markings. Caudal mucous pore small. Peripodicil groove very 

 distinct. Foot-fringe deep yellow, with broad irregular dark lineolcs. 

 Foot-sole dirty }ello\v. 



Length (in alcohol) 39 millim, breadth of foot-sole 3 millim. 



Hal). — Mt. Mausson, 2 — 3000 ft , Tonkin (H. Fruhstorfer). 



Type in my collection. 



