44 ZOOLOGY OF THE VOYAGE OF THE SULPHUE. 



A species nearly allied to the singular C. trigonostoma, having a similar rela- 

 tive situation of the whorls to each other, and a very large umbilicus. This is a 

 smaller shell, with a shorter spire, and sutures less profound. 



Family — OLivACEiE. 

 Ancillaria. Lamarck. 



180. Ancillaria mamillata, (Plate XI, fig. 7,8.) Testa elongate ovata, aurantiaco-fulva ; 

 anfractu ultimo superne et ad basin saturatius fasciato ; spirS. valde mamillaeformi, sulcato, veluti ex 

 machina tomato, apice mucronata, antice et ad dextram callo rugoso insigniter induta ; labro 

 inferne denticulato, columella callosa alba. 



Inhab. Straits of Malacca. In seventeen fathoms, in the mud. 



This species is not unlike A. rubiginosa, except that the spire is very 

 remarkably nipple-shaped, and grooved in a manner so regular as to appear to 

 have been subjected to a lathe; at the extremity it is mucronate, and a thick 

 rugose callus is spread over its anterior and right side. 



Family — MarginellacejE. 



Marginella Lamarck. 

 Section I. Phsenospira. 



181. Marginella nodata, Hinds, Proceed. Zool. Soc. 1844, March, (Plate XIII, fig. 6, 7.) 

 Testa elongate ovata vel subfusiformi, luteo-olivacea, lineis nigris subflexuosis longitrorsum ornata, 

 punctis concoloribus conspersis : spira. elongata, inconspicue plico-costata ; labro incrassato, intris 

 denticulato ; columella quadriplicata. 



Inhab. Cape Blanco, west coast of Africa. In twelve to fifteen fathoms, sand. 



Whilst this species possesses the general aspect and character of M. Cleryi, 

 it differs in being somewhat larger, more broadly shouldered, having the longi- 

 tudinal lines studded at intervals with dark spots, and which are somewhat regu- 

 larly disposed in the transverse direction, and lastly, in having the spire less 

 elongated, and furnished with rather indistinct pliciform ribs. 



182. Marginella musica, Hinds, Proceed. Zool. Soc. 1844, March, (Plate XIII, fig. 8, 9.) 

 Testa ovata, cinereo-olivacea, lineis nigris transversim ornata; spira retuso-conica ; labro paululum 

 incrassato, intus lam ; columella quadriplicata. 



Inhab. Cape Blanco, west coast of Africa. In thirty-three fathoms, sand. 



