116 PROCEEDINGS OF THE ACADEMY OF 



pertenui, color columbfe ; ppirii snbobtusa ; anfractibus quiuis, convexiusculis, 

 ulti'uo pergrandi ; aperturu, magnix, late elliptica ; labro regularirer expanse, 

 snbtfer margiaem parum incrasiato et crocato; columella medio impressa, 

 pirum incrassata et plica induta. 



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



Physa Blandii. — Testa ovato-subfasiformi, subobliqiia, inflata, dilute stram- 

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

 inflato et pergrandi ; apertura ovata, subgrandi; labro expanse, subier raar- 

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

 contorta. 



Hub. — California, ilr. Thomas Bland. 



Physa Nuttallii. — Testa inflata, subdiaphana, parum nitidA albida ; spira 

 obtusa, curta ; suturis impressis; anfractibus quaternis, convexi?, ultimo per- 

 grandi et ioflato ; apertura grandi, subrotunda, subter raarginem pallido- 

 fusca. ; labro acuto, valde expanse; columella leviter incrassata, et contorta. 



Hab. — Lewis' River, Oregon, Prof. Thomas Nuttall. 



Physa VENOSTA. — Testa subcj'lindracea, tenuissimu, diaphana, nitidu, alba; 

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

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

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



Hab. — Near Fort Vancouver, Oregon, Sir George Simpson. 



Physa hordacea. — Testa subcylindraceil, pellucida, polita, dilute rufa ; spirS. 

 subelevata subacuta ; suturis subimpressis ; anfractibus qiiinis, ultimo grandi 

 et constricto ; labro acuto, margins rufo lineato ; apertura ovata, superne 

 acute angulaia ; columella aliqu;tut6 impressa et incrassata. 



Uab. — Vancouver Island, Oregon, Sir George Simpson. 



Physa brevispira. — Testa laBvi, lato-elliptica, albidA, diaphana, inflata ; spira 

 brevis-ima, obtusa, vix exserta ; anfractibus ternis, ultimo grandi et inflato ; 

 labro acuto, maigiae intus incrassato ; apertura pergrandi et dilatata ; colu- 

 luella. incrassata, impressa et contorta. 



Hab. — Ottowa River, Canada West, E. Billings, Esq. 



% ^-l 



^^ 



A Critical Eeview of the Family PROCELLflLRID.ffi: :— Part II. ; Embracing tho 



PUFFINE.a:. 



BY ELLIOTT COUES^ M, D. ; U. S. A. 



The 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- 

 fineffi, or "Shearwaters." 



In writing upon the Procellariepe 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 the Puffinese, 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 the 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 



FApril, 



