12 Mr. E. A. Smitli on Mollusca from the 
the description of the type; but this is probably due to age. 
The form of the valves, the muscular scars, and the radiately 
ridged and grooved character of the epidermis are similar in both 
examples. The fringed character of the latter, as described, 
was due to splitting when dry. In the present shell it is 
entire along the edge and curls over within the valves, being 
plicate and puckered at the anterior end. The valves are 
connected along the entire hinge-line by the epidermis, and 
the ligament is black, posterior to the beaks, and has no 
extension within the valves. 
Cuspidaria macrorhynchus. (Pl. I. figs. 5, 5 a.) 
Testa tenuis, alba, haud nitida, subglobosa, postice longissime et 
anguste rostrata, lineis incrementi tenuibus sculpta; rostrum 
rectum, carina obliqua debile dimidiatum, ad extremitatem 
curvate truncatum ; umbones involuti, contigui; valva dextra 
dente unico laterali tenui instructa; sinistra edentula; loculus 
ligamenti minimus, obliquus, postice declivis, infra umbonis 
apicem situs; pagina interna lactea. 
Longit. 22 millim., alt. 9, diam. 8. 
Hab. Station 177, lat. 13° 47' 49" N., long. 73° 7! E., off 
west coast of India, in 636 fathoms. 
In certain lights, in addition to the lines of growth, very 
faint traces of radiating sculpture are observable. 
Cuspidaria Wollastonii, Smith, from the Atlantic, resembles 
this species in the general outline of the body of the shell; 
but its rostrum is shorter and broader, and is bisected by a 
sharper keel. On comparison of the left valves (only one 
valve of CO. Wollastonii is known) slight differences in the 
ligament-pit and the dorsal margin are observable. 
Lucina spinifera (Montagu). 
Lucina spinifera, Forbes and Hanley, Brit. Moll. vol. ii. p. 49, pl. xxxv. 
fig. 1; Jeffreys, Brit. Conch. vol. ii. p. 240, vol. v. pl. xxxii. 
figs. 6, 6a; Reeve, Conch. Icon. pl. vii. fig. 39. 
Hab. Station 172, off Trincomalee, Ceylon, in 200-350 
fathoms. 
Three specimens from the above locality I am unable to 
separate from this European species. The form in northern 
specimens is more or less variable, and the same variation 
occurs in the Indian-Ocean examples. ‘The concentric 
lamellae are stronger near the umbones and rather more 
distant, and the posterior dorsal margin ‘is straighter than 
