UOLLtlSCA OF INDIA. 



189 



Subfamily Thtsanotin^. 



Genus Thysanota, Albers. 



Thysanota, Albers, Die Heliceen, p. 63 (1860) (type Nanina 

 guerini, Pfr. : Nilgherries) ; Theobald, Suppl. Cat.^p. 26 (1876) ; 

 NeviU, Hand-list, i. p. 54 (1878). 



Thysanota ckinigera, Benson. (Plate CXII. figs. 2-2 d.) 

 Helix crinigera, Benson, A. M. N. H, 1850, ser. 2, vol. v. p. 214 ; 



Pfr. Men. Hel. vol. iii. p. 112; Reeve, Couch. Icon, fig. 746; 



Hanley, Conch. Ind. p. 27, pi. Ix. fig. 7. 



Trochomorplia crinigera, Theob. Suppl. Cat. p. 23. 



Original description : — " Testa anguste umbilicata, depresso-trochi- 

 formi, cornea, radiato-costulata ; apice obtusiuscido ; anfractibus 

 6-65, vi.v convexiuscidis, linea unica elevata supersutarali munitis ; 

 idtimo carinato, carina siduraque pilis elongatis ciliatis, basi plani- 

 itscida, ad umbilicum compressiuscida, lineis impressis concentricis 

 frequentibus ornuta ; apertura obliqua angidato-lunari, secunforini ; 

 peristomate simplici, acuto. 



"Diam. major 12|, minor 12, alt. 6| mill. 



'^ Hab. ad latus moiitium ' Nilgheries ' versus Orientem spectans. 

 Teste Jerdon. 



" This shell in size and characters is intermediate between HelLv 

 guerini, Pfr., an inhabitant of the summits of the Nilghery Moun- 

 tains, and H. retifera, Pfr., which inhabits the warmer valleys of 

 the same range according to Dr. Jerdon, to whom I am indebted 

 for specimens of all the three species from the localities indicated." 



When making a list of species in my collection preserved in 

 alcohol, I found a single specimen of Helix crinigera sent to me 

 some years ago by Colonel Beddome. This had been put on one 

 side in the hope of obtaining further specimens ; for the shell being 

 a fine one I did not like to destroy it and perhaps find the animal, 

 as is so often the case, in a state in which very little can be made 

 out. With Mr. Collett's material in hand, it has at last been 

 examined and has proved to be a most interesting and valuable 

 specimen, being in excellent preservation. It clears up the position 

 of a group of land-shells which had, until now, a very undefined 

 one. 



Animal (fig. 2). Has a pointed foot ; no gland. A wide well- 

 marked pallial margin, paler than that of the foot above. The 

 buccal mass and intestine, with the salivary gland, was well seen 

 (fig. 2 d) ; and the jaw and radula were got out complete. The 

 first (figs. 2h, 2 c) is long and narrow, thin, with a slightly concave 

 central portion. Under a high power, the jaw is seen to be made up 

 of a number of narrow vertical plates coalesced together, which may 



