NATURAL SCIENCES OP PHILADELPHIA. 57 



Exeinplum typicum : Psephis Lordi == Chione Lordi, Baird, Proc. Zool. Soc, 

 1863, p. 69. 



Hab. In sinu Pugetiano primum legit Kennerley : postea, in insula Van- 

 cover legit Lord : in insula Catalina, Cooper. 



Venus Kennerleyi, n. s. 



V. t. ovali, solida, calcarea, squalide alba ; marginibus sequaliter excur- 

 vatis ; valde inaequilaterali, haud tumida, ; rugis concentricis, validis, crebris, 

 irregularibus, haud acutis, instructa ; interstitiis concentrice striatis, (t. 

 juniore suborbiculari, striis radiantibus ornata ;) lunula lineis impressis 

 definita, rugis appressis instructa; area, haud definita; intus, dentibus utra- 

 que valva, iii., quorum altera i. altera ii. plus minusve bifidis ; fulchro valido ; 

 cicatricibus muscularibus validis ; sinu pallii parvo, anguste angulato ; mar- 

 ginibus tenuiter crenulatis. Long. 2-5, lat. 1*8, alt. 1-25. 



Hab. In sinu Pugetiano legit Kennerley: testas juniores, "V. astartese" 

 Midd. similes, legerunt juxta Neeah Bay, Swannii Indianuli. 



ASTARTE (? COMPRESSA, VCir.) COMPACTA. 



A. t. " A. compressse" simili, sed compacta, minus transversa ; liris concen- 

 tricis expressis, paucioribus, marginem posticam versus obsoletis ; umboni- 

 bus valde prominentibus, acutioribus ; marginibus dorsalibus rectis, ad 

 angulum 100 ; lunula minus impressa, longiore ; area ligamentali minus 

 angulata ; dente laterali antico valva dextra magis extante. Long. -4, lat. 

 33, div. -21. 



Hab. In sinu Pugetiano specimen unicum piscavit Kennerley. 



LUCINA TENUISCULPTA, n. S. 



L. t. U L. Mazatlanicse" forma, simili ; sed magis convexa, sculptura multo 

 tenuiore ; epidermide olivaceo-cinerea induta; t. juniore lam ; postea, rugis 

 incrementi concentricis, plus minusve conspicuis, distantibus, irregularibus ; 

 costulis radiantibus subobsoletis, latis, crebrioribus, antice et postice evani- 

 dis ; area postica vix subquadrata, haud definita : intus, dentibus cardinali- 

 bus et lateralibus normahbus, satis extantibus ; ligamento externo, elongato ; 

 cicatrice antica normaliter prolongate ; margine crenulato. Long. -23, lat. 

 21, alt. -13. 



Hab. In sinu Pugetiano legit Kennerley. 



Cryptodon serricatus, n.s. 



C. t. parva, subplanata, subcirculari, tenui, alba, haud flexuosa ; epider- 

 mide tenuissima, vix straminea, serricata, induta ; laevi, seu lineis incrementi 

 vix ornata, nitente ; suborbiculari, seu ventraliter producta ; marginibus 

 undique valde et regulariter rotundatis, regione lunulari incurvata ; utnbo- 

 nibus antice hamatis ; lunula planata, haud exacte definita : intus, ligamento 

 tenui, omnino celato ; dentibus cardinalibus in utraque valva uno, extante, 

 lateribus nullis ; cicatricibus adductoribus subovalibus, haud prolongatis ; 

 linea. pallii a margine haud crenato satis remota. Long. *16, lat. -18, alt. *1. 



Hab. In sinu Pugetiano legit Kennerley : in insula Vancouver, Swannii 

 Indianuli. 



Pythina rugifera, n. s. 



P. t. majore, tenuissima, valde transversa, subquadrata, vix inaequilaterali; 

 lineis incrementi et epidermide rugosa, confertissime laminata, ornata ; um- 

 bonibus latis, valde prominentibus, antice flutentibus ; marginibus, dorsali- 

 bus satis regulariter excurvatis, regione postica paulum majore ; ventrali 

 planato, seu medio concavo : intus, cardine maxime delicatulo ; dente cardi- 



1865.] 



