VLIOCENE I'KCTENS. 108 



A l\i_ii II liaviiii;' !'.• ribs, and allied to. if not identical with, /'. cauriinix, was 

 found in tin' lower Pliocene {() sandstone at the month of tne Raft River, 

 Jeti'erson County, \Vash. The ril)s on the right val\'<> of this specimen were 

 narrower and those on the left valve were somewiiat higher thati those of a 

 typical I'd II ri mix. 



I'fct'/n fimrinitx is found abundantly in the lower Pliocene aionj;' Eel, River, 

 Humboldt County. Some of the specimens from this locality have as many as 

 25 ribs, and the i'il)s are, in some cases, iiigiier and narrower than in the t\'pical 

 foi'm. On Eel River above the mouth of Price Crecii, Mr. J. S. Diller found 

 P. caariuiis associated with the following' fauna: Asfi/n's riclitlwfenl, Vallista 

 xuhdiap/ia/ui, ChrymdomuH ii. sp., Ki'nnerJia (jrandix, K. hU'm'inata, Macoma 

 calcareii, Macoma (cf.) nasida, JV(d'ica vlawsa, Panotiiya ampln^ PIcurofoina pervei'm, 

 Prieiii' n. sp. (?) near oregonensls, Tapex skdct/i, Thracia tra peso ides, Trophon 

 near iiiuUic(Matus, and Yoldia sciHHurata. This is a Pliocene fainia. 



From Switch Gulch to French Ciulch, on the Eel Riv(>r, P. canrlnufi is found 

 with the following: Cai'dlnin meel'ianum, jYafica chiiim, Mactra (fif.) callfomlea, 

 SiltqiHi patula, Macoma calcarea, M. inquinata, Tapex xfah/t/i, Tivxux ni(U(dli, 

 Solen (cf.) slcarim, PI<>urotoma perrersa, Thracia trnpezoldcx. Ckri/xodomux n. sp., 

 Yoldia scissiirata, Pxephix {cf.) taidiUa, Trophon near inu.Uicoxtatiix. Scntella or 

 Echinarachniux sp. indet. This is also a Pliocene fauna. 



A magnificent specimen of /*. cauriniix, measuring nearly ii(K) millimeters in 

 altitude, was found by Dr. Stephen Bowers in the Pliocene near Santa Paula, 

 Ventura County. 



The type of P. caurinux is in the LT. S. National Museum, No. .5954. 



RAXGH. 



Living. Puget Sound (Carpenter). 



Pleistocene. Santa Barbara: San Pedro (Cooper, Mrs. A. E. Bush, Arnold). 



Pliocene. Mouth of Raft River, Jeti'erson County, Washington (Arnold); above 

 mouth of Price Creek, from Switch (Julch to French Gulch, and south of the 

 middle of Rio Dell Bluti', Eel River (,J. S. Diller): Eel River, Humboldt 

 County (W. S. Monroe, A. C. Lawson); T. 1 N., Huml)oldt meridian, Hum))oldt 

 County (J. M. Graham): Eagle Prairie, Humboldt County; San Fernando, Los 

 Angeles County (Cooper): Santa Paula, Ventura (Jounty (Bowers, Watts); 

 Santa Barbara; San Pedro (Arnt)ld). 



Pecten (Patixopecten) healeyi n. sp. 



PI. XXXVI, fij;s. 1 and la; PI. XXXVII, fifjs. 1, l-,, ami 2. 



1879. I'ecten expansus Dall, Proc. I'. S. Nat. Mus., vol. 1, 187H, p. 14; not I'lvU-n. rxpanann Smith, 



Quart. Jonr. Geol. Soc, vol. '.i, 1847, pp. 4i;i, 419, pi. IS, fig. 21. 

 1898. I'ecten {J'atinopecten) ej:pansus Dall, Trans. \Vau;nfr Free Inst. 8ci., vol. 'A, pt. 4, 1898, p. 706, 



pi. 26, fig. 1. 



1903. Pecten (Paiinopecleii) expaimuK Dall, Arnold, iNIeni. Cal. .\.ead. Sci., vol. 3, 1903, p. 108. 



1904. Pecten expamus Dall, Rivers, Bull. So. Cal. Acad. Sci., vol. :i, no. .5, p. 69. 



Description. — Shell averaging about lau millimeters in altitude, length about 

 equal to height, inequivalve (the right slightly more ventricose than the left), 

 equilateral, and with smooth margins; base evenly rounded; sides only slightlv 



