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 otlier 

 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 RKCTA. Nuc. tcstil oblongd, tumidd, inclinate sulcatd, recte 

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

 4 1in. 

 Hub. New Guinea ; in seven fathoms. 

 Cab. Belcher et Cuming. 



NucuLA EXCAVATA. Nuc. testd globosd, sulcatd, gibbose rostratd, 

 antlce carinatd ; lunuld excavatd, ovali, striatd. Long. 4 ; lat. 2^ ; 

 alt. 3^ lin. 

 Hab. Panama ; dredged among mud in thirty fathoms. 

 Cab. Belcher. 



NucuLA KETicuLATA. Niic. testd parvd, oblongd, sulcatd, striis 

 longitudinalibus interstitialibus reticulatd ; antice arcuate rostratd. 

 Long. 3 ; lat. li ; alt. 2 lin. 

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

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

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

 fathoms, clayey sand. 

 Cab. Cuming. 



NucuLA LYRATA. Nuc. tcstd oblongd, nitidd, angtilati sulcatd, 

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

 irali actito integro. Long. 9^ ; lat. 4 ; alt. 5 lin. 

 Hab. Panama; from thirty fathoms. 

 Cab. Belcher. 



NucuLA PUELLATA. Nuc. testd oblongd, nitidd, laviter 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. 



NucTJLA CRisPA. Nuc. tcstd oblongd, turgidd, sulcatd, araiate 7'os- 

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

 ovali. Long. 3; lat. 1^; 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." 



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

 cuatd, albido-lutescente ; latitudine longitudinem quintuplo supe- 

 rante ; margine postice rotundato, antic(; convexo ; natibus ad quin- 

 tam partem totius latitudinis collocatis ; epidermide amphl, rugosd, 

 impolitd, oUvuceo-flavescente ; dente valido, acuto, in titrdque valvd 

 promine?ite. Lat. 1 ; long. 5 poll. 



Hab. ad Insulas Pliilippinarum. 



