NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 199 



LIMIFOSSOR FRATULA Heath, 1911. 



Mem. Mus. Comp. Zool., vol. 45, No. 1, p. 72, pi. 2, fig. 6 ; etc. 

 Off Point Loma, California, in 120 to 284 fathoms. 



Family LEPIDOMENIIDAE. 

 Genus NEMATOMENIA Simroth, 1893. 



NEMATOMENIA PLATYPODA Heath, 1911. 



Mem. Mus. Comp. Zool., vol. 45, No. 1, p. 151, pi. 1, fig. 4, etc. 

 Off Agattu Island, Aleutians, in 482 fathoms. 



Genus HEATHIA Thiele, 1913. 



HEATHIA POROSA Heath, 1911. 



Mem. Mus. Comp. Zool., vol. 45, No. 1, p. 159, pi. 3, fig. 4, etc. 

 Off San Diego, California, in 500 to 542 fathoms. 



Genus DONDERSIA Hubrecht, 1888. 



DONDERSIA CALIFORNICA Heath, 1911. 



Mem. Mus. Comp. Zool., vol. 45, No. 1, p. 155, pi. 3, fig. 9 ; etc. 

 Off San Diego, California, in 21 fathoms. 



Family NEOMENIIDAE. 



Genus PACHYMENIA Heath, 1911. 



PACHYMENIA ABYSSORUM Heath, 1911. 



Mem. Mus. Comp. Zool., vol. 45, No. 1, p. 72, pi. 38, fig. 11 ; pi. 39, figs. 1-4, 



etc. 

 Off Southern California, in 2,196 to 2,228 fathoms. 



Genus ALEXANDROMENIA Heath, 1911. 



ALEXANDROMENIA VALIDA' Heath, 1911. 



Mem. Mus. Comp. Zool., vol. 45, No. 1, p. 142, pi. 3, fig. 6, etc. 

 Off Southern California, in 603 to 1,350 fathoms. 



Family PRONEOMENIIDAE. 



Genus DORYMENIA Heath, 1911. 



DORYMENIA ACUTA Heath, 1911. 



Mem. Mus. Comp. Zool., vol. 45, No. 1, p. 95, pi. 3, fig. 11, etc. 

 Off Southern California, in 302 to 638 fathoms. 



