77 
Nera cosTELLATA, Deshayes (sp.). 
Corbula costellata, Deshayes, Géologie de la Gréce, Mollusques, 
ele. fal, 2,8. 
Hab. Originally described as a fossil by Deshayes, but has been 
subsequently obtained recent by Professor Forbes in the Adriatic Sea. 
A pair of valves is in the collection of Mr. Cuming, purporting as 
coming from the north-west coast of Sweden, and has the name of 
Neera sulcata attached to them. 
NeE#rA cosTaTa, Sow. (sp.) 
Anatina costata, Sowerby, Proc. Zool. Soc. 1834, p. 87. 
Hab. The west coast of America, between 2° 47! and 8° 5! north 
lat., namely at St. Helena, from six fathoms, sandy mud ; Magnetic 
Island, twenty-two fathoms; and coast of Veragua, twenty-six fathoms, 
mud. 
Cab. Belcher et Cuming. 
Nez#ra Goutpiana. N. testd oblongd, fragili, hyalind, ventricosd ; 
costis duodecim radiantibus; valvis vald? inequalibus ; rostro 
lineis tribus obliquis elevatis. Long. 34; lat. 13; alt. 2 lin. 
Hab. New Guinea; Cagayan, island of Mindanao; and Bay of 
Manila, Philippines : in from seven to thirty fathoms, sandy mud. 
Cab. Cuming et Belcher, 
The specific name is in honour of Dr. Gould, the author of the 
able and luminous Report on the Mollusca of Massachusetts. 
Ne#ra Sincarorensis. N. testd oblongd, fragili, hyalind, ventri- 
cosd, costis 17-20 radiantibus ; valvis inequalibus ; rostro bre- 
viusculo, lineis tribus obliquis elevatis. Long. 23; lat. 14; alt. 
12 lin. 
Hab. Singapore ; in seven fathoms, mud. 
Cab. Cuming. A single specimen. 
A shell so very similar to N. Gouldiana that it might most easily 
be confounded with it. In that species however I find the number 
of radiating ribs to be so constant in a number of individuals, that I 
must regard it a good diagnostic character. The present species then 
will be found to differ from it in its smaller size, diminished number 
of radiating ribs, and shorter beak. 
Nrara casta. N. testd oblongd, fragili, hyalind, ventricosd ; costis 
numerosis radiantibus, minoribus alternantibus, transverse subtilis- 
sim? striatd ; rostro breviusculo, parvo, lineis obliquis elevatis in- 
structo. Long. 22; lat. 14; alt. 13 lin. 
Hab. New Guinea ; dredged from a muddy floor in seven fathoms. 
Cab. Belcher. 
Nezra concinna. N. testd oblongd, fragili, subplanulatd ; costis 
numerosis, parvis, confertis, ultimd maximd ; valvis subequalibus ; 
rostro parvo, breviusculo, lineis tribus obliquis elevatis instructo. 
Long. 22; lat. 1; alt. 14 lin. 
Hab. ? 
Cab. Cuming. 
