250 Mr. E. A. Smith on Mollusca from the 



a)quales ; umbones parvi, acuti, poatmediani ; deiites cardinales 

 duo insequales in utraque valva, laterales valvoe destrsie elongati, 

 teuues, posterior antico remotior ; pagina interna albida, zonis 

 concentricis snbcseruleis picta, radiatim tenuissime substriata ; 

 cicatrix antica elongata, angusta, postica rotundata ; sinus pallii 

 perprofundus. 

 Longit. 44 millim. ; diam. 11 ; alt. 25. 



Hah. Station 229, off Travancore coast, in 360 fatli. 



Thinner and narrower than T. staurella ; without colour- 

 rays, with more delicate finer concentric sculpture, a less 

 prominent posterior ridge in the right valve, and a shallower 

 groove in the left. 



32. Ahra affinis. 



Testa A. maxhnce similliraa, sed minor, convexior, postice minus 

 producta vel minus cuneiforrais, lunula latiore prsesertim parte 

 valvae sinistrse, sinuque lineoe pallii antice magis acuto. 



Longifc. 27 millim. ; diam. 9 ; alt. 17. 



Hah. Off Travancore coast, in 498 fath. 



The differences between A. maxima'^ y Sow., A. convexior ^^ 

 Smith, and the present species are quite appreciable on com- 

 parison, although resembling one another in some respects. 



33. Myodora quadrata. 



Testa compressa, paulo incequilateralis, postice latissime truncata, 

 antice obtuse cuneiformis ; margo dorsi posticus declivis, fere 

 rectilinearis, anticus valde descendens, subrectilinearis quocjue, 

 veiitralis late curvatus ; valva dextra mediocriter profunda, solidi- 

 uscula, intus conspicue margaritacea, extus concentrice sulcata et 

 lamellata, area postica porca haud profunda ad umbone radiante 

 obscure limitata ; sinus pallii latissimus, haud profundus ; valva 

 sinistra — ? 



Longit. 12^ millim. ; alt. 11. 



Hah. Station 229, off Travancore coast, in 360 fath, ; also 

 Station 233, off Andaman Islands, in 185 fath. 



Remarkable on account of the very broad truncated poste- 

 rior end and the very pearly interior. It is not anticipated 

 that the left valve would offer any special features. It is 

 probably flat and more feebly sulcated than the right. 



* Ann. & Mag. Nat. Hist. 1894, vol. xiv. p. 169, pi. v. tigs. 5, 6. 

 t Op. cit. 1895, vol. xvi. p. 10, pi. ii. figs. 4, 4 a. 



