46 



Tetrodon strigosus. Telr. dorso hispido, nigrescente ; ventre 

 lateribusque Icevibus, his alio nigroque longitudinaliter Uneatis, 

 illo albo : pinnd caudali quadratd; pectoralibus late rotundatis. 

 D. 12. A. 9. P. 19. C. 8. 



Tetr.Uneato. Linn., (Tetr. Physa, GeoS.,) analogus videtur. Dif- 

 fert maxima ventre lateribusque baud armatis. 



The exhibitiori was resumed of the new species of Shells collected 

 by Mr. Cuming on the western coast of South America and among 

 the islands of the South Pacific Ocean. Those brought on the pre- 

 sent evening under the notice of the Society were accompanied by 

 characters by Mr. G. B. Sowerby. They belonged to the 



Genus Petricola. 



Petricola kluptica. Pet.tesld ovato-elUpticu,rufescenti-albidd; 

 radiatim costatd, poslici lavi ; lamellis cone entricis spar sis ; lu- 

 nuld untied distinctd : long. 1-2, lot. 07, alt. 0-9 poll. 



Hob. ad Paytam. 



Found in hard mud at low water. — G. B. S. 



Petricola oblonga. Pef. testd oblongo-ellipticd, pallescente ; 

 radiatim costellutd ; lined dorsali posticd rectiusculd; lamellis 

 concentricis pluribus, postici lavigatis : long. 0'9, lat. O'b, alt. 

 07 poll. 



Hub. ad oras Peruvise. (Pacosmayo.) 



Found in hard mud at low water. — G. B. S. 



Petricola solioa. Pet. testd subgloboso-ellipticd, pallescente, 

 umbonibus extremitatibusque ambabus fusco-violaceis ; radiatim 

 costatd, postici Icevigatd ; Uneis incrementi nonnunquam subla- 

 viellosis, posticd magis eminentibus : long. 1*3, lat. 0'8, alt. 

 10 poll. 

 Hab. ad oras Peruviae. (Lambeyeque.) 

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



Petricola discoks. Pet. testd oblongo-ellipticd, brunnescente; ra- 

 diatim costellutd, costellisacutis, postice lavi ; lined dorsali redd : 

 long. 0-8, lat. 0'3, alt. 0-55 poll. 



Hab. ad littora Peruviae. (Lambeyeque.) 



Found in hard clay. — G. B. S. 



Petricola concinna. Pet. testd oblongd, pholadiformi, albicante ; 

 concentrice costellutd; antice rotundatd, radiatim sulcatd ; dorso 

 declivi, allerius valves lamelld Icevigald ; postici acuminatiusculd , 

 colesllis concentricis lamellosis, confertis: long. 0*8, lat. 0-35, 

 alt. 0-35 poll. 



Hab. ad Montem Christi. 



Only one perfect pair and a single valve could be preserved. 



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



Petricola denticulata. Pet. testd oblongd, pholadiformi, ex- 

 iiis pallescente, intds ad extremitates fusco-nigricnnte tinctd ; 

 antice siibrostratd , posiici rotundatd} lined dorsali rectiusaila. 



