116 PROCEEDINGS OF THE ACADEMY OP 



pertenni, color eolumbre ; spira subobtusa ; anfractibus quinis, convexiuseulis, 

 ultimo pergrandi ; apertura magna, late elliptica ; labro regulari'er expanso, 

 subter marginem parum incrassato et crocato; columella medio impressa, 

 parum incrassata et plica induta. 



Hub. Salt Lagoon, near Monterey, California, J. B. Trask, M. D. 



Physa Blandii. Testa ovato-subfusiforrni, subobliqua, inflata, dilute stram- 

 inea vel albida; spira obtusa; suturis impressis; anfractibus quaternis, ultimo 

 intiato et pergrandi; apertura ovata, subgrandi; labro expanso, subter inar- 

 ginem incrassato et pallido crocato ; columella incrassata, impresssa, plicata et 

 contorta. 



Hub. California, Mr. Thomas Bland. 



Physa Xcttallii. Testa inflata, subdiaphana, parum nitida albida ; spira. 

 obtusa, curta ; suturis impressis; anfractibus quaternis, convexis, ultimo per- 

 grandi et inflato ; apertura grandi, subrotunda, subter marginem pallido- 

 fasca ; labro acuto, valde expanso; columella leviter incrassatii, et contorta. 



Hub. Lewis' River, Oregon, Prof. Thomas Nuttall. 



Physa venusta. Testa subcyliudracea, tenuissima, diaphana, nitida, alba; 

 spira curta, acuminata; suturis leviter impressis ; anfractibus quaternis, convex- 

 iusculis, ultimo pergrandi ; apertura magna, elongato-ovata, subter marginem 

 fusca : labro acuto et sinuoso, vix expanso; columella parum impressa. 



Hub. Near Fort Vancouver, Oregon, Sir George Simpson. 



Physa hordacea. Testa subcylindracea, pellucida, polita; dilute rufa ; spira 

 subelevata subacuta ; suturis subimpressis ; anfractibus quinis, ultimo grandi 

 et constricto ; labro acuto, margine rufo lineato ; apertuia ovata, superne 

 acute angula'a ; columella aliquanto impressa et incrassata. 



Hub. Vancouver Island, Oregon, Sir George Simpson. 



Physa breyispira. Testa laevi, lato-elliptica, albida, diaphana, inflata ; spira 

 brevissima, obtusa, vix exserta ; anfractibus ternis, ultimo grandi et inflato ; 

 labro acuto, margine intus incrassato; apertura p'ergraudi et dilatata ; colu- 

 mella in> ' !, impressa et contorta. 



Hub. Ottowa River, Canada West, E. Billings, Esq. 



A Critical Review of the Family PROCELLARIDiE : Part II. ; Embracing the 



PUFFINEJE. 



BY ELLIOTT COUES, M. D. ) U. 8. A. 



Tbe present paper is the second of a series in which it is proposed to con- 

 sider the entire family of Petrels. The first fasciculus in which the Procel- 

 larieae or " Stormy Petrels" are reviewed, has already appeared in these Pro- 

 ceedings ; in the present continuation of the subject are embraced the Puf- 

 finese, or "Shearwaters." 



In writing upon the Procellariese I had regard more particularly to the 

 generic disposition of the species ; for most of them were so well known as 

 to require comparatively little comment upon their specific distinctions. 

 With tthe Puffiuere, however, the case is exactly the reverse. While 

 the generic groups are very plainly indicated, the species compri ed in each 

 are for the most part quite numerous, and their relations to each other, gene- 

 rally so very intimate, as regards size, form, and color, that it requires care- 

 ful and discriminating comparison to separate them. I have, therefore, given 

 this part of tbe subject in hand special attention ; and have gone consider- 

 ably into details in my examination of the specific characters and relation- 

 ships of the numerous components of the group, believing that in no other 

 way can the desirable degree of information on the subject be attained. At 



TApril, 



