Zoological Society. 471 



preceding species and of N. pella. Here it presents the most usual 

 features of regular furrows with intervening ridges ; but in the other 

 two species the ridges are inclined planes, having an inclination 

 towards the ventral margin. In this direction they consequently- 

 present a number of step-like elevations, but not in the contrary. 

 NucuLA RECTA. Nuc, testd oblongd, tumidd, inclinate sulcatd, recte 

 et attenuate rostratd, postice rotundatd. Long. 6 ; lat. 2^ ; alt. 

 4 lin. 

 Hob. New Guinea ; in seven fathoms. 

 Cab. Belcher et Cuming. 



NucuLA EXCAVATA. Nuc, testd globosd, sulcatd, gibhos^ rostratd, 

 antice carinatd ; lunuld excavatd, ovali, striatd. Long. 4 ; lat. 2 J ; 

 alt. 3i lin. 

 Hab. Panama; dredged among mud in thirty fathoms. 

 Cab. Belcher. 



NucuLA RETICULATA. Nuc. testd pavvd, oblongd, sulcatd, striis 

 longitudinalibus interstitialibus reticulatd ; antice arcuate rostratd. 

 Long. 3 ; lat. 1 J ; alt. 2 lin. 

 Hab. Philippine Islands, in several localities : namely, Cagayan, 

 island of Misamis, from twenty-five fathoms ; Mindanao, from twenty- 

 five fathoms, sandy mud; and Loay, island of Bohol, from sixty 

 fathoms, clayey sand. 

 Cab. Cuming. 



NucuLA LYRATA. Nuc. tcstd oblougd, mtidd, ungulate sulcatd, 

 acute subrecte rostratd, postice elongatd, rotundatd ; margine ven- 

 trali acuto integro. Long. 9^ ; lat. 4 ; alt. 5 lin. 

 Hab. Panama ; from thirty fathoms. 

 Cab. Belcher. 



NucuLA PUELLATA. Nuc. testd oblongd, nitidd, Iceviter striatd, an- 

 tice breviter arcuate rostratd, postice rotundatd ; prope umbones 

 turgidd. Long. 3 ; lat. 1^ ; alt. 2 lin. 

 Hab. Malacca ; from ten to seventeen fathoms, coarse sand. 

 Cab. Cuming et Belcher. 



NucuLA CRisPA. Nuc. testd oblongd, turgidd, sulcatd, arcuate ros- 

 tratd, antice ab umbonibus exaratd, postice obtuse carinatd; lunuld 

 ovali. Long. 3; lat. Ij; alt. 2 lin. 

 Hab. Gulf of Nicoya ; from thirty-six fathoms. 

 Cab. Belcher et Cuming. 



Mr. Lovell Reeve communicated a paper from Mr. Sylvanus Han- 

 ley, containing the following " Descriptions of five new species of 

 bivalve Shells, from the collection of W. Metcalfe, Esq." 



SoLEN Philippinarum. Sol. testd lineari, convexd, crassd, subar- 

 cuatd, albido-lutescente ; latitudine longitudinem quintuple supe- 

 rante ; margine postice rotundato, antice convexo ; natibus ad quin- 

 tam partem totius latitudinis collocatis ; epidermide ampld, rugosdy 

 impolitd, olivaceo-flavescente ; dente valido, acuto, in utrdque valvd 

 prominente. Lat. 1 ; long. 5 poll. 



Hab. ad Insulas Philippinarum. 



