Zoological Society. 135 



gent ibus, prof usi et vividepictd ; intus alba, marginibus (in adultd) 

 castcmeo-nitidis , crenatis ; epidermide crassd, pilosd. Alt. 4 ; 

 long. 3f ; lat. 2. 

 Hab. Guaymas, Gulf of California. 



This magnificent shell, which was brought from the above port by 

 Mr. Babb, R.N., accords in some measure with Lamarck's descrip- 

 tion of his Pectimculus undulatus. The figure in Delessert's ' Recueil 

 de Coquilles,' however, of that shell, fully exhibits its specific differ- 

 ence. 



Pectunculus raripictus. Pect. testa suboblique cordatd, radiatim 

 costatd, costis plants in medio scepe sulcatis ; costarum interstitiis 

 profundis; albd luteo-castaned, parce variegatd, intus albd, an- 

 tice purpureo-tinctd. 



Hab. ? 



The ribs in this shell are peculiarly firm and squarely grooved out, 

 as it were, and they are often slightly rutted about half-way up the 

 middle. 



Pectunculus aurifluus. Pect. testd orbicitlari-cordatd, incequi- 

 laterali, radiatim costatd, costis obsolete sulcatis ; albd, transversim 

 aurijiud, antice maculis aureis nigerrimo-fuscis marginatis. 



Hab. } 



This new and beautiful shell may be easily recognised by its very 

 bright orange painting. 



Pectunculus holosericus. Pect. testd suborbiculari, Iccvi, albidd, 

 multiradiatd, epidermide sericd indutd. 



Hab. } 



The peculiar, close, velvety epidermis of this shell is alone suffi- 

 cient to distinguish it. 



Mr. Fraser characterized two new species of Birds from Western 

 Africa : — 



MusciPETA Smithii. Musc. corpore pallide rufo ; caudd, alisque 

 nigrescentibus, cinereo-lavatis ; capite, collo, rostro, pedibusque 

 nigris. 



Long. tot. 7f unc. ; al(B, 3 unc. 4 lin. ; rostri, a rictu ad apicem, 

 10 lin. ; caudee, 3 unc. 10 lin. 



Hab. Western Africa. 



The dimension above given of the tail of this bird includes the 

 two central feathers, which are about half an inch longer than either 

 of the others ; these latter, when spread out, form a segment of a 

 circle, the outermost feathers being the shortest. The head and 

 neck are glossy black, but in certain lights exhibit a slight bluish 

 tint: the whole body and win2:-coverts are of a rust- colour, for the 

 most part pale, but assuming a decided and rich hue on the abdomen ; 

 the tail and feathers of flight in the wings are of a deep brownish 

 gray, but inclining to black. The bill is stout. 



Treron CRASsiROSTRis. Trcr . viridis ; capite, collo pectoreque 

 cinerascenti-viridibus ; ventre citrino ; alarum tectricibus regione 

 carpali vinaceo-purpureis ; remigibus fusco-uigrescentibus ; caudd 



