20 MAZATLAN BIVALA'^ES 



Genus EUPELLAEIA, Bellevue. 



Eupellaria, Fleuriau de Bellevue, 1802, Bullet. Soc. Philom. 



nr. QH.—Philippi, Sanclh. d. Conch. Sf Mai. in loco. 

 Gastrana, Sc/mm. 1817. 

 Venerupis, Lam. 1818.— Desk. B. M. Cat. Yen. p. 189. 



27. EUPELLAEIA LINGUA-FELIS, 11. S. 



V. t. suhcyUndricd, alba, tenuissime et dense granulosa, suh- 

 diaiihand; gmnulis irregidanter confertis, liiieis radiantibus 

 conjluentibm ; circa umbones IcBvigatd, liris concentricis inter- 

 rwptd ; strias incrementi iionnunquam monstrante ; lunuld in- 

 distinctd;7im7jonibuspromi)ie>itihiis; intus politd, margine plaiid ; 

 impressiones musculares vix monstrante, sinu pallii magno, 

 clreulari; dentibus S—2, quartom una bifida; nympliis et liga- 

 mento parvis ; dentibm et nymphis supra lineam cardinalem 

 intus prominentib us. 



Shell in sliape like P. mirabilis, Besh., which represents it on 

 the Californiau coast ; but recognized at once by its surface 

 which presents, under the microscope, most delicate granula- 

 tions somewhat Hke Telliua lingua-felis, whence its name. 



Smallest specimen measures long. "025, lat. '03, alt. "02, 



Largest „ „ „ 'H, „ '16, „ "09. 



^«7j.— Mazatlan ; in Chamse and Spondylus Lamarckii, nestling 



in burrows, rare ; L'pool Sf Havre Coll. 



Tablet 72 contains 5 specimens in various stages of growth. 



28. EUPELLAEIA EXAEATA, H. S. 



V. t. forma " Linguce-felis" simUi, umbonibmque ut in specie 



Hid : sed radiatim tenue sulcatd, alhicante, rufo-fulvo macu- 



laid : fortiori, nee intus politd : dentibus 3-3, quarum una 



bifida, extantibus : epidermidc tenui, fused. 



Shell in size and shape like V. Imgua-felis, but wanting the 



granulose texture, and covered (except at the umbos, which are 



concentrically striated) with very fine rather ii-rcgidar radiating 



ribs, as in Petricola, interrupted occasionally by lines of growth. 



Colour whitish, stained with chocolate. Hinge teeth projectmg 



upwards, not sideways as in the last. Pallial sinus large, well 



rounded. These shells have the general appearance of Naranio, 



Grai/. 



