84 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 23 



the ears, as P. ornatus, differing slightly, however, in the following 

 characteristics ; 1 ) the body of the shell is much more strongly arched, 

 and describes more than a half-circle; 2) the ribs are all of equal size, 

 not alternately smaller; 3) the latter are completely smooth, not scaled." 

 (Translation from German.) 



Stempell {loc. cit.) remarked of this species, "The largest, 60 milli- 

 metre examples of the Plate collection differ from the description of 

 Philippi in that their ribs are not all the same size, and they evidence 

 a scaly sculpture toward the shell's edge, but nevertheless they may with 

 certainty be classified with the species described by Philippi, particularly 

 since a small example from out of the Philippi lot exhibits uneven ribbing 

 and, at least at the edge, weak traces of scales. The number of ribs 

 varies also in the specimens present, just as in those of the Philippi types, 

 between 30 and 34," (Translation from German.) 



When von Martens mentioned Pecten laetus Gould he was un- 

 doubtedly referring to the shell Gould described under that name in 

 1850 (p. 345; New Zealand.) ; Gray had previously named the same 

 shell Pecten zelandiae (Gray in Dieffenbach, 1843, p. 260; New 

 Zealand.). Gould again used the name Pecten laetus for a different 

 shell in 1862 (p. 39; Hakodadi Bay, Japan.) ; the second usage being 

 invalid, Kuroda renamed the Japanese shell Pecten (Chlamys) farreri 

 nipponensis (1932, p. 91), which Habe emended to Pecten (Chlamys) 

 njpponensis (1951, p. 73). 



Chlamys amandt and C. patagonica are almost certainly conspecific. 

 However no figures of C. amandi were ever published and the author 

 has not been able to locate any specimens identified as that species, so it 

 does not seem advisable at present to place amandi in synonymy. 



Chlamys hastata (Sowerby) 1842 

 Plates 27-28 



Pecten hastatus Sowerby, 1842, p. 72, pi. 20, fig. 236. [No locality.] 



[?] Pecten co?«fl'/w^ Valenciennes, 1846, pi. 18, fig. 2. [Carpenter (1864, 

 p. 528) commented, "May be = hastatus, jun. ; but, although fig- 

 ured without the red spot, it most resembles Hin. giganteus, jun."] 



[non] Pecten comatus Miinster in Goldfuss, 1833, p. 50, pi. 91, figs. 5a, 

 5b, 5c. "E montibus Westphalicis." [Jurassic of Westphalia, Ger- 

 many.] 



Pecten rastellinum Valenciennes, 1846, pi. 19, fig. 4. ["^ P. hastatus, 

 jun.", fide Carpenter, 1864, p. 528.] 



