COMPLETE GRAU : PECTINIDAE OF THE EASTERN PACIFIC 15 



Subgenus PARVAMUSSIUM Sacco 1897 



Parvamussium Sacco, 1897a, p. 102, [Proposed as a subgenus of Amus- 

 siujn Herrmannsen, 1846, p. 47 (invalid emendation of Amusium 

 Roding, 1798, p. 165) ; no diagnosis given but type species desig- 

 nated.] — Sacco, 1897b, p. 48 [diagnosis]. Type species: Pecten 

 (Pleuronectes) duodecim-lamellatus Bronn, 1832, p. 624; type 

 locality: Upper Miocene of Tabbiano, Italy. 



Faria?nussium Sacco, 1897a, p. 102. [Proposed as a subgenus of Amus- 

 siu/n Herrmannsen; no diagnosis given but type species designated.] 

 — Sacco, 1897b, p. 49 [diagnosis]. Type species: Amussium can- 

 cellatum E. A. Smith, 1885, p. 315, pi. 23, figs. 8, 8a-8c; type 

 locality: Challenger station 33, off Bermuda, in 435 fathoms. 



Ctenamusium Iredale, 1929, p. 164. Type species: Amusium thetidis 

 Hedley, 1902, p. 304, fig. 49; type locality: off Port Kembla, New 

 South Wales, Australia, in 63-75 fathoms. 



Glyptamusium Iredale, 1939, p. 370. [Proposed as a genus in the family 

 Amusiidae.] Type species: Amussium torresi E. A. Smith, 1885, p. 

 311, pi. 23, figs. 3, 3a, 3b; type locality: Challenger station 1858, 

 east of Cape York, Queensland, Australia, in 155 fathoms. 



Xenamussium Oyama, 1944, p. 244. [Proposed as a subgenus of Prope- 

 amussium.] Type species: Pecten hoskynsi Forbes, 1844, pp. 146, 

 192 ; type locality: "Off Asia Minor." 



Squa?namussium Oyama, 1944, p. 245. [Proposed as a subgenus of 

 Propeamussium.] Type species: Amussium squamigerum E. A. 

 Smith, 1885, p. 312, pi. 23, figs. 5, 5a; type locality: Challenger 

 station 24, off Culebra Island (off eastern Puerto Rico), in 390 

 fathoms. 



Polynemamussium Habe, 1951, p. 72. [Proposed as a subgenus of 

 Parva?nussiu?n.] Type species: Pecten intuscostatus Yokoyama, 

 1920, p. 156, pi. 13, figs. 9, 10; ? type locality; (Japanese species). 



Bathy amussium Oyama, 1951, p. 79. [Proposed as a subgenus of Cten- 

 amusium.] Type species: Amussium jejfreysii E. A. Smith, 1885, 

 p. 310, pi. 23, figs. 2, 2a-2c; type locality: Challenger station 210, 

 Philippine Islands, in 375 fathoms. 



Micramussium Oyama, 1951, p. 80. [Proposed as a subgenus of Cten- 

 amusium.^ Type species: Ctenamusium (Micramussium) siratama 

 Oyama, 1951, p. 80, pi. 13, figs. 5-7; type locality: off Manazuru- 

 zaki, Sagami Sea, in 159-128 fathoms. 



