TROCHOMORPHA. 9 



14. Trochomorpha siibnigritella, Beddome. 



Trochomorpha .subiiu/rifella, Beddome, P. Z. S. 1891, p. ni4, pi. 29, 

 figs. 4-G ; Pilsbiy, Man. Couch, ser. 2, viii, 189;J, p. 127, pi. 43, 

 tigs. 44-46. 



Discus suhmjrltella, Godwin-Austen, P. Z. S. 1895, p. 442. 



Orvjinal description : — " Shell moderately umbilicate, depressedly 

 turbinate, quite rounded at the apex; vvhoi'ls 6, very gradually 

 increasing, faintly striated, the last sharply angled at tho 

 periphery, nearly flat on the underside ; aperture oblique, sub- 

 quadrate ; peristome simple, the margins distant ; colour a rich 

 dark brown, shining below. 



"Diameter k inch [=12-75 mm.], height f\ incli [ = 8 n^.m.] 



"This species recalls the Pacific forms of the genus rather than 

 the Indian ones, its nearest ally being T. uigritella, which, how- 

 ever, is a larger shell with the last whorl much broader." 



Hah. Andaman Islands (i/^tt/*</e)/orf/) ; South Andaman ((?ocZwi»- 

 Ansten). 



15. Trochomorpha sulcipes, March. 



Nanina (Videna) sulcipes, Mcirch, .Tourn. Conchyl. 1872, p. 309. 

 Discus sulcipes, Godwin-Austen, P. Z. S. 189o, p. 442. 

 Troc/iomorpha sulcipes, Nevill, Hand List, i, 1878, p. 57. 



Original description : — " T. tenuis, unicolor fusca, perspective 

 umbilicata, depressa, subdiscoidea, acute cariuata ; striae iucre- 

 menti expressae praesertim superne ; spiraliter obsolete lirata ; 

 spira vix elevata ; sutura linearis, marginata ; anfr. 5^ convexi- 

 usculi, ultimus descendens, basi convexiusculus ; apertura reni- 

 forniis, peristomate obliquo, niargiue supero incrassato, infero 

 reflexo ; labio recto, tuberculo (morbo?) obsoletissimo. 



"Diam. maj. 13 mill, min. 11 ; axis 5 mill." 



Hah. JS'icobar Islands {Stoliczlca, Roepstorff) ; Nancovvry (Rein- 

 liardt). 



Var. major, March, torn. cit. p. 309. 



"T. major, tenuior, planior ; peristoma teiiue (nondum com- 

 pletiim?) ; anfr, ult. vix descendens, umbilico majore. 



"Diam. maj. 15 mill., min. 12; axis fere 5 mill." 



Hah. Great and Little Nicobar (Jieinhardt). 



" Animal solt^a pedis sulco mediano loiigitudiuali postice coch- 

 leariformi excavata ; uotaeum sulco profundo, peripherico postice 

 carinato. Porus caudalis, ut mihi videtur, vix cornutus (ex 

 specim. in spiritu conservato). T. feta? anlr. primi tres brunnei 

 serie macularum albarum." 



T. sanis, Bens., differs in having the spire nearly plai.e, and in 

 the growth-lines on the upper side being much stronger. 



