\'2[ CAMFOUNIA A(.\I>1'.MY OV SCIENCES. 



48. Pandora (Kennerlia) filosa Carpenter. 



I'LATK XVIII, I'Ki. 3. 



Kfunerlia filosa Cpr., Brit. Assn. Rcpl., 1S63, p. 63S; Troc. Zool. Soc, 1864. p. 602. 



Shell small, planoconvex, elonjjate-oval, thin; iiniboncs minute, about one-fourth length from 

 anterior e.xtremity; anterior and jiosterior dorsal marjjins straij>;ht, making an angle of 160 degrees 

 at the umbo; ventral margin arcuate; posterior e.xtremity long, narrowed and truncated at the end; 

 anterior rounded up from base but making an angle with dorsal margin; a single prominent poste- 

 rior, submarginal ridge runs from umbo to extremity on each valve, being nearer the margin in the 

 flat valve; surface of both valves sculptured by numerous fine, concentric, incremental lines, and 

 that of the right valve by fine radiating sulcations; left valve with a thin hinge ossicle; right valve 

 with two ossicles, the anterior one being short. 



Dimensions. — Long. 16 mm.; alt. 7 mm.; diam. 3 mm.; umbo to anterior end 4 mm.; to 

 posterior end 12 111 in. 



The right valve of tliis little shell looks sometliiiio; like :v wing, and re.seinl)les 

 Clidiophora punctato, but is distinguishable by the straight dorsal margin, radiating 

 sulcations, and narrower form. 



Specimens identified by Dr. Dull. 



One right and one left valve found in the lower San Pedro series of Doadninn 

 Island. The specimen figured is from the lower San Pedro series at Dcndnmn Island. 

 and is now in the collection of Delos Arnold. 



Living. — Puget Sound (Carpenter). 



Pleistocene. — San Pedro (Arnold). 



Genus Clidiophora Carpenter. 



.Shell inequivalve, thin, pearly inside; valves close, attenuate behind; right valve rather 

 tumid, with three hinge teeth, the posterior one elongated; left valve often with two teeth; ossicle 

 present; pallial line simple. 



Clidiophora claviculata Carp, is a characteristic species. 



49. Clidiophora punctata Conrail. 



Patidora punctata Coii., ]ourn. Phil. Acad. Sci., Vol. VII, 1837, p. 22S, PI. XVII, fig. i. 



Clidiophora punctata CoN., CPR., Brit. A.s.sn. Rept, 1863. p. 638. CPR., Proc. Zoo!. Soc, 1864, 

 p. 598. Gabb, Pal. Gal., Vol. II, p. 90, 1869. Cooper, 7th Ann. Rept. Cal. St. Min., 

 1888, p. 235. Williamson. Proc. U. S. Nat. Mus., Vol. XV, 1892, p. 183. 



Shell rather small, suboval, much compressed, tliin; umbo jjosterior to center, marginal, 

 not elevated; anterior dorsal margin concavely arcuate; anterior extremity rostrated; posterior 

 extremity evenly rounded; outer surface sculptured with fine, concentric, incremental lines; interior 

 pearly, punctate; right valve slightly tumid, with three hinge teeth; left valve with two hinge teeth. 



Dimensions. — Long. 30 mm.; alt. 19.5 mm.; diam. 5 mm.; umbo to anterior end 21 mm.; 

 to posterior end 9 mm. 



Specimens identified by Dr. Dall. 



