16 Mr. E. A. Smith on Mollusca from the 
simis radiantibus obsoletis sculpta; margo dorsi anticus valde 
descendens, subarcuatus, posticus longior, magis curvatus, ven- 
tralis late arcuatus ; area dorsalis antica in medio prominens et 
carinata, prope umbones lunulam parvam exhibens; area postica in 
medio anguste sulcata, sulco fusiforme utrinque acute mar- 
ginato; umbones incurvati, circiter in 7 longitudinis collocati ; 
pagina interna iridescens, margaritacea, radiatim minutissime 
substriata ; dentes cardinis anteriores circiter octo, posteriores 
circa viginti; fossa ligamenti angusta, obliqua, postice declivis. 
Longit. 17 millim., alt. 12, diam. 74. 
Hab. Station 162, lat. 13° 51! 12" N., long. 80° 28 12" E., 
off Coromandel coast, in 145-250 fathoms. 
N. Stranget, A. Adams, from New Zealand, is very like 
this species in general form ; but a careful comparison reveals 
certain differences. It is smaller and more solid, the anterior 
area has not the peculiar central keel-like prominence, and 
the posterior side lacks the narrow fusiform escutcheon 
observable in the present species. ‘The hinge-plate is stronger, 
the teeth fewer, and the ligament-pit less oblique, &e. 
Nuculana fumosa. (Pl. IL. figs. 10, 10 a.) 
Testa parva, subtriangularis, postice breviter rostrata, ineequilateralis, 
epidermide polita fumose olivacea induta, incrementi lineis leviter 
striata; margo dorsi anticus obliquus, levissime excurvatus, 
posticus zque declivis, longior, paulo concavus ; margo ventralis 
late arcuatus ; latus anticum acute rotundatum, posticum obtuse 
nasutum ; area dorsalis anterior vix lunulata, haud circumscripta, 
posterior in medio excavata, concavitate carina obtusa circum- 
data ; linea cardinis crassiuscula, dentibus anticis ad 14 posticisque 
circiter 17 instructa; fossa ligamenti minuta; pagina interna 
cxeruleo-grisea. 
Longit. 7 millim., alt. 4, diam. 33. 
Hab. Station 162, Bay of Bengal, off Coromandel coast, 
145-250 fathoms. 
This species somewhat recalls the Portlandia pygmea of 
Norway and Greenland, but ismore pointed behind, and covered 
with a darker epidermis; the posterior dorsal area is more 
excavated, the escutcheon being lanceolate and bounded by a 
distinct ridge on each side. 
Nuculana indica, (PI. II. figs. 11, 11 a.) 
Testa triangulariter ovata, postice acuminata, rostrata, antice acute 
rotundata, paulo inequilateralis, epidermide flavescenti-viridi 
induta, subleevis, sed supra medium valvarum plicis paucis concen- 
tricis utrinque obsoletis instructa, striisque incrementi sculpta ; 
