126 



aperturd dorsali minimd, margine limbi interni nigricante : long. 

 0-9, lat. 0-6 poli. 

 Hab. ad Real Liejos, Americse Centralis. 



The dorsal perforation in this species is so small, and the colora- 

 tion so dark, that it is difficult at first sight to perceive that it is really a 

 Fissurella. 



Found under stones. — G. B. S. 



Fissurella iNieatJALis. Fiss. testd ohlongd, tenui, suhdepressd, la- 

 tere antico brevi, postico longo; intus albicante, margine albo ni- 

 grocue vario, crenulato; extus radiatim striatd, concinrie decus- 

 satd, olivaced albicante subradiatim variegatd; aperturd dorsali 

 anticd, oblongd, utrinąue bidentatd : long. l'l, lat. O 6 poli. 



Hab. ad Guacomayo et ad Insulas Gallapagos sub lapidibus litto- 

 ralibus.— G. B. S. 



Fissurella Pica. Fiss. testd oblongd, tenui, subdepressd, latere 

 antico brevi, postico longo ; intiis albicante, margine crenulato ; ei- 

 tus radiatim striatd, concinnt decussatd, albd olivaceo variegatd; 

 aperturd dorsali anticd, ellipticd.fere circulari, parvd : long. 1-, 

 lat. 0-57 poli. 



Hab. ad Sanctam Elenam et ad Insulas Gallapagos. 



Variat testą albicante, radiatim olivaceo fasciata. 



Found on dead shells in from six to eight fathoms \vater. — 

 G. B. S. 



Fissurella Chemnitzii. Fiss. testd ovato-oblongd, depressius- 

 culd, crassiusculd, lateribus subcompressis , extremitatibus levatis; 

 intūs albd, impressione musculari prope marginėm conspicud; ei- 

 tus radiatim subsulcatd, subdecussatd, paUescente roseo subradiatd; 

 aperturd dorsali magnd, ovali, rimd internd latd : long. 22, lat. 

 1-4 poli. 

 Hab.} 



The onlj'- specimen I have ever seen of this species was in the 

 Tankerville CoUection, from ■vvhich, after several vicissitudes, it has 

 at length found its -vvay to Mr. Cuming's. 



This remarkable shell is represented by Martini (I. t. xi. f. 100), 

 ■whose figure is cited by Lamarck as a reprcsentation of Fiss. Gracą. 

 —G. B. S. 



Fissurella latimarginata. Fiss. testd ovato-oblongd, depressd, 

 crassiusculd, antice angustiorcį intus albd, margine lato rufes- 

 centi-nigro, crenulato; eatiis radiatim creberrime striatd, rufes- 

 centi-nigrd; aperturd dorsali oblongd: long. 2'8, lat. I 8 poli. 



Hab. ad Valparaiso et ad Iquiqui. 



Found on the rocks. — G. B. S. 



Fissurella trapezina. Fiss. testd subtrapeziformi, rotundato- 

 angulatd, antice angustiore, depressd, eostremitatibus levatis ; in- 

 tus albd, impressione musculari prope 7nargincm remotd, margine 

 incrassato ; cxtiis concentrici subsulcatd, pallidd fusco radiatd; 

 aperturd dorsali magnd, latd, antici latiore : long. 0'95, lat. 08 

 poli. 



