COMPLETE GRAU : PECTINIDAE OF THE EASTERN PACIFIC 61 



oun, formerly Cameroons, to Angola). Bavay (1936, p. 317) 

 listed Pseudamussium exoticum Chemnitz, and in the synonymy 

 included "Loveni Dunker (juv.)." 



15. H. and A. Adams (1858, p. 553) first validated Pseudamussium 

 as a supraspecific name, proposing the unit (as from Klein, with no 

 mention of Chemnitz) as a subgenus of Pecten. Their list of species 

 included both hybridus and septemradiatus, proving that they re- 

 garded them as distinct. 



16. Kiister (1859, p. 86, pi. 19, figs. 7-8; pi. 22, figs. 5, 7, 10) in- 

 cluded four species in the synonymy of Pecten hybridus Gmelin: 

 Lister's shell, Chemnitz' Pseud-amusium, Ostrea squamosa Gmelin 

 and Pecten hybridus Lamarck. He gave as locality the Philippines, 

 which is correct only for Ostrea squamosa^ and all five of his 

 figures clearly represent that species. 



17. Chenu (1862, p. 184) diZttA Pseudamussium (as a subgenus) from 

 Klein, listing "P. pseudamussium Lamarck," P. glaber Linne and 

 P. dispar Lamarck as species. Klein was invalid, and the Adams' 

 had validated the supraspecific name four years earlier; the specific 

 names have been discussed. 



18. Stoliczka (1871, p. 426) dated Pseudamussium (as a subgenus) 

 from Klein and designated Pecten exoticus Chemnitz as type. He 

 was followed by Fischer (1886, p. 944), Philippi (1900, p. 108), 

 Cossmann & Peyrot (1914, p. 106), von Teppner (1922, p. 208) 

 and Marwick (1928, p. 456). 



19. Kobelt (1881, p. 373) and Zittel (1881, p. 29) designated Pecten 

 glaber Linne as type species, following Morch in erroneously re- 

 garding P. exoticus Chemnitz a synonym. 



20. Dall (1886, p. 219) dated Pseudamusium (as a section) from the 

 Adams' (invalidly emending the name as they had proposed it), and 

 designated, "types Pecten dispar and P. pseudamussium Lam." 



21. Verrill (1897, p. 60) and Arnold (1906, p. 50), adopting Dall's 

 invalid emendation, also dated Pseudamusium from the Adams' 

 (but as a subgenus) , with Pecten exoticus as tj^pe. 



22. Dall (1898, p. 697) dated Pseudamusium (this time as a subgenus) 

 from the Adams,' designated Pecten exoticus as type, and placed in 

 synonymy "P. pseudamusium (Klein) Sby." 



23. Dall (1898, p. 751) evidently reconsidered the matter of the type 

 species and designated Pecten hybridus Gmelin; this was the first 

 valid designation. He was followed by Suter (1913, p. 1880). 



