THTSAK^OTA. 11 



Trochomorpha tabicla, Pfeiffer, Malak. Blatt. ii, IS^jo, p. 132. 

 Naiiina {Tlu/sanota) tahida, Xevill, Hand List, i, 1878, p. 54. 

 Ryssotu tahida, J'ieitfer& Clessin, Nouiencl. Helic. Viv. J881, p. 53. 

 Trucho)nurpha ( TJu/sanota) tahida, Tryon, Man. Conch, ser. 2, iii, 



1887, p. 94, pi. 19, figs. 97, 98. 

 Eulota {Thysanota) tahida, Pilsbiy, Man. Conch, ser. 2, ix, 1895, 



p. 208. 



Original description : — " T. augustissirae umbilicata, turbinata, 

 solidula, cout'erte rugoso-striata, sub epidermide decidiia, fuscida 

 alba ; spira convexo-conica, acutiuscula ; aiifr. 8 lentissime accres- 

 centes, vix coiivexiusculi, ultimus non descendens, peripheria 

 subangulatus, superue couvexus, basi planiusculus ; aperfcura vix 

 obliqua, depressa, subaugulato-luuaris ; perist. simplex, rectum, 

 margine basali versus insertiouem leviter iucrassato. 



" Diam. maj. 17^, niin. 16, alt. 11 mill." 



J/ah. India : jNilgiris. 



Pfeiffer recognized the affinity between the present species and 

 2\ ijaeriai. It is, however, larger than the latter and not keeled, 

 while the whorls are more tumid and the umbilicus is narrower ; 

 the aperture is also different, being rather semilunate, the colu- 

 mellar margin ascending more obliquely. 



18. Thysanota guerini, Pfeiffer. 



Helix (juerini, Pfeiffer, llev. Zool. 1842, p. 304 ; ibid., in Philippi, 



Abb. Beschr. Conchyl. i, 1843, p. 12, pi. 3, hg. 6; ibid., Conch. 



Cab., Heliceen, ii, 1853, p. 121, pL 87, figs. 15, 16 ; lieeve, Couch. 



Icon, vii, 1852, pi. 85, fig. 457 ; Hauley & Theobald, Conch. Ind. 



1870, pi. 55, iig. 1. 

 Nanina {Thysanota) qHerini, Martens, Die Heliceen, ed. 2, 1800, 



p. 63; Nevill, Hand List, i, 1878, p. 54. 

 Trochomorpha guerini, Kobelt, 111. Conch. Buch. 1879, pi. 68, fig. 11. 

 Trochomorpha {Thysanota) guerini, Pfeiffer & Clessin, Noniencl. 



Helic. Yiv. 1881, p. 82. 

 Helix {Thysanota) t/iierini, Tryon, Man. Conch, ser. 2, iii, 1887, 



p. 93, pi. 18, figs. 95, 96. 

 JEulota {Thysanota) guerini, Pilsbry, Man. Conch, ser. 2, ix, 1895, 



p. 208. 

 Thysanota guerini, Godwin- Austen, Moll. India, ii, 1907, p. 188. 



Original description : — " T. umbilicata, trochiformis, epidermide 

 fusca, rugosa induta ; anfr. 7| vix convexiusculi, basi carinati ; 

 carina pilis confertis dense ciliata ; basis convexiuscula ; umbilicus 

 angnstissimus, pervius ; apertura lata, lunaris ; peristoma simplex, 

 marginibus callo teuuissimo, nitido junctis. 



"Diam. maj. 16, niin. 15, alt. 10 mill." 



Hah. India: JN'ilgiries {Ferrottet, Blanford) ; Anamnlhys {Bed- 

 dome). 



In his original description, Pfeiffer gave the following dimen- 

 sions : Diam. 22, alt. 13 mill. Subsequently (Mon. Helic. Viv. i, 

 1847, p. 118), the measurements quoted above were indicated 

 without reference to the previous figures. I assume the later 

 ones to be correct. 



