47 



ventrali subprominuld ; omninu radiatim sulcatd et concenlrice 



striatd, striis antice sublatnellosis denliculatis : long. 1 '3, lat. 0'6, 



alt. 0-6 poli. 

 Hab. ad Paytam Peruvise. 



Found in hard clay and stones at lovv vvater. — G. B. S. 

 Var. abbreviata. Testd breviore, striis sublamellosis denliculatis 



nidlis: long, l'l, lat. 0'6, alt. OS poli. 

 Hab. ad Insulam Piatae. 

 Found in stones at lovv vvater. — G. B. S. 



Petbicola kugosa. Pet. testd oblongd, pholadifomii, albicante; 

 radiatim costellatd, tenuissime concentrice striatu; marginibus 

 plerumgue deformibus : long. 1"4, lat. 0*55, alt. 0'7 poli. 



Hab. ad oras Chilenses. (Conception.) 



Found in Balani at from three to seven fathoms depth. — G. B. S. 



Petricola tenuis. Pet. testd oblongd, plioladiformi, tenui, al~ 

 bicante ; radiatim costellatd, costellis anticis posticisgue fortiO' 

 ribus, omnibus striis exilissimis rugulosis decussatis; latere antico 

 brevissimo : long. 1*, lat. O' 5, alt. O 55 poli. 



Hab. ad littora Peruviae. (Larabeyeąue & Pacosmayo.) 



Found in hard clay at low water. — G, B. S. 



Petricola robusta. Pet. testd rotundato-subtrigond, subgibbosd, 

 solidiusculd, extūs rufescente-fuscd, iJitūs nigricante; radiatim 

 costatd, costis anticis tenuioribus conferlioribus, posticis altio- 

 ribus ; interstitiis omnibus exilissimi decussatirn striatis ; latere 

 antico rotundato, postico subacuminato ; margine dorsali declivi : 

 long. 1-2, lat. 0-8, alt. 0-9 poli. 



Hab. ad Panamam et ad Insulam Muerte dictani. 



Found in rocks at the depth of from six to eleven fathoms. — G. B. S. 



Petricola amygdalina. Pet. testd tenui, subhyalind, Jlavescente, 

 obovatd, Icevi ; latere antico brevissimo, angustiore ; postico lon-* 

 giore, altiore, lamellis nonnullis elevatis distantibus omato : 

 long. 1-3, lat. 0-5, alt. OS poli. 



Hab. ad Insulas Gallapagos. 



Found in Mother-of-Pearl Shells in from three to six fathoms at 

 Lord Hood's Island.— G.B. S. 



The folIowing " Description of a new Genus of Gasteropoda, by 

 W. J. Broderip, Esq.,Vice President of the Geological and Zoological 

 Societies, F.R.S., &c." was read. 



ScUTELLA. 



Testą Ancyliformis, intiis nitens. Apex posticus, medius^ invo- 

 lutus. Impressiones musculares duse^ oblongo-ovatse, laterales^ 

 Apertura magna, ovata. 



Animal marinum. 



This genus appears to be intermediate between Ancylus and Patella, 

 while the aspect of the back sometimes reminds the observer of Navi- 

 cella or Crepidula, Lam, Its place will most probably be a>mong 

 the Cyclobranches of Cuvier. 



