22 ON THE ANATOMY OF SOME TASMANIAN SNAILS, 



retractor muscle ; prostate aud vagina spirally twisted, the 

 former connected by a short but much convoluted hermaphrodite 

 duct with the ovotestis, a compact bilobed body. 



Anoglypta launcestonensis, Reeve. 



This species is confined to a mountainous district in the N.E. 

 of the island. I collected it among the fern-tree gullies on Mr. 

 Dyer's estate, where it was plentiful. The animal was not very 

 different in form from B. dufresni, and measured (total length) 

 47 mm. ; tentacles 10 mm. ; colour dark chestnut shaded to choco- 

 late on the back, tentacles shaded to black on the tips. Habits 

 very shy and timid, crawling very slowly; it frequents damp places 

 under logs and decaying stems of tree-ferns. The fire and axe of 

 civilisation threaten to diminish the already narrow range of this 

 splendid and interesting species ; but its haunts are so rugged and 

 remote that I do not fear its extinction. Mr. Dyer says that an 

 egg resembling, though different from, that of B. dufresni is laid by 

 this mollusc at similar seasons and in similar localities. The jaw 

 is rather straight and broad, irregularly slightly dentate on the 

 cutting margin, smooth on the convex margin, closely and finely 

 transversely striate. The teeth are arranged in 160 rows of 

 40-6-1-6-40 ; the rachidian cusp is single, straight, slender, smaller 

 than the laterals, the cutting point reaching four-fifths of the 

 length of the widely expanded basal plate ; the laterals possess a 

 single stout cusp with a rounded cutting point overlapping the 

 posterior margin of the basal plate, whose distal margin is alate ; 

 from these the marginals differ in the longer more inclined cusp, 

 the extreme marginals having their cusps low and irregularly 

 notched. The genitalia are characterised by a long, flattened, 

 twisted penis-sac, retractor muscle inserted near apex, and the 

 spermatheca on a long slender duct. 



