TROCHOMORPHA. 9 



14. Trochomorpha subnigritella, Beddome. 



Trochomorpha subnigritella, Beddome, P. Z. S. 1891, p. 314, pi. 29, 

 figs. 4-6 ; Pilsbry, Man. Conch, ser. 2, viii, 1893, p. 127, pi. 43, 

 figs. 44-46. 



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



Original description : " Shell moderately umbilicate, depressedly 

 turbinaie, quite rounded at the apex ; whorls 6, very gradually 

 increasing, faintly striated, the last sharply angled at the 

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

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

 dark brown, shining below. 



"Diameter \ inch [=12-75 mm.], height -f s inch [=8 mm.] 



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

 the Indian ones, its nearest ally beiug T. nigritella, which, how- 

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



Nab. Andaman Islands (Hunyerford) ; South Andaman (Godwin- 

 Austeii). 



15. Trochomorpha sulcipes, Morcli. 



Nanina ( Videna) sulcipes, Morch, Journ. Conchyl. ] 872, p. 309. 

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

 Trochomorpha sulcipes, Nevill, Hand List, i, 1878, p. 57. 



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

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

 menti expresses praesertim superne ; spiraliter obsolete lirata ; 

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

 usculi, ultimus descendens, basi convexiusculus ; apertura reni- 

 f or mis, peristomate obliquo, margine supero incrassato, infero 

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



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



Hob. Nicobar Islands (Stoliczka, Roepstorff) Nancowry (Rein- 

 hardt). 



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



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

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



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



Hab. Great and Little Nicobar (Reinhardf). 



" Animal solea ped.is sulco mediano longitudinali postice coch- 

 leariformi excavata ; notseum sulco profundo, peripherico postice 

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

 specim. in spiritu conservato). T. fetae anfr. primi tres brunnei 

 serie macularum albarum." 



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

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



