ACADEMY OF NATURAL SCIENCES. 209 



adduct. subrotundatis ; sinu pallii raaximo, ovali, ascendente, per quintas inter 

 sex totius interstitii partes porrecto ; colore secundum paginam externam tincta 

 et radiata. 



Long. 0-58, lat. 0-40, alt, 0. 16. 



Hab. Santa Barbara, 16 fra. 1 valve ; Catalina Island, 40-60 fm., not uncom- 

 mon ; Cooper. 



Genus ? Venus, Ln.' Subgenus Psephis, Cpr. 1864. 

 Psephis salmonea, Cpr. n. s. State Collection, No. 1068. 



Ps. t. Parva, subinflata, subcequilaterali, subtrigona ; colore salmoneo ; extus 

 nitida, minutissime et creberrime concentrice striata ; margine ventrali excur- 

 vato ; dorsalibus antico et postico subrectis : intus, dent. card, iii.-iii., quorum 

 utraque valva anticus porrectus, quasi lateralis, centrales parvi ; v. dextr. dente 

 postico in marginem sulcatum decurrente ; cicatr. adduct. satis conspicuis, sub- 

 rotundatis ; linea, pallii satis interna, vix obsolete sinuata. 



Long. 0-12. lat. 0-11, alt. 0"06. 



Hab. Catalina Island, 30-40 fm., rare. ; Cooper. 



Placed under Psephis by analogy ; whether the animal be ovoviviparous has 

 not yet been ascertained. 



Genus Astarte, J. Shy. 

 Astarte Jiuctuata, Cpr. n. s. State Collection, No. 1060. 



A. t. valde planata, ovoidea, costis concentricis valde distantibus, angustis, 

 undulatis, ornata ; marg. dors. post, subrecto, ant. concavo, lunula longa, parum 

 impressa ; ventr. satis rotundato ; ant, valde rotundato ; post, subquadrato ; 

 intus, v. dextr., lamina cardinali planata ; dent. card. i. inter fossas ant. par- 

 vam, post, triangularem, extante; dent. lat. ant. acutiore, satis elongato, post, 

 nullo ; cicatr. adduct. ovalibus, postica callo definita ; margine baud crenato ; 

 sulco ligamenti externi elongato. 



Long. 0-33, lat. 0.26, 0-10. 



Hab. Catalina Island, 30-40 fm. Cooper. 



Only dead right valves having been found, it is not known whether this spe- 

 cies be an Astarte (according to Messrs. Adams and Hanley) or an abnormal 

 Crassatella. It scarcely differs from the young of Astarte omalia, from the Cor- 

 alline Crag 1 . 



-&■ 



Genus Cardium, Ln. Subg. Fulvia, Gray, 1847, [or Laevicardium ? Sw., 1840,] 



Cardium (? modestum, var) centifilosum, Cpr. State Collection 381. 



C. t. parva. tenuissima, inflata, subquadratim rotundata ; umbouibus angustis, 

 tumidioribus ; marginibus, dorsalibus subalatis, antico et ventrali aqualiter rotuud- 

 atis, postico vix truucato ; tota superficie, (nisi umbonibus et dorsum versus utro- 

 que latere laevibus,) tenue lirata ; liris circ. centum, quoad magnitudinem extanti- 

 bus, angustis ; interstitiis subaequalibus, subquadratis, interdum punctato-decus 

 satis ; parte postica a line'a definita, lirulis minus conspicuis, laminis concentricis 



14 



Proc. Cal. Acad. vol. hi. xrr Feb., 1866. 



