REPORT ON THE LAMELLIBRANCHIATA. 299 



Pecten undttlatus, Sowerby. 



Peden nndulatus, Sowerby, Thes. Concli., vol. i. p. GO, [jI. xix. figs. 206, ;07. 

 Pecten undul((tus, Reeve, Conch. Icon., vol. viii. pi. .kx. fig. 73. 



1 = Pecte7i tasmanicus, A. Adams and Angas, Proc. Zool. Soc. I.ond., 1863, p. iif^, pi. xxxvii. 

 figs. 21, tf, b. 



Habitat. — Station 162, off East Moncoeur Island, Bass Strait, iii 38 fathoms 

 (Challenger) ; Tasmania (Brit. Miis.). 



This species is not the same as Pecten jlexuosus, Poli, as stated by Weinkauff 

 (Conch. Mittelm., vol. i. p. 258), nor would he have considei-ed it as such had it been 

 properly characterised in the first instance. The minute shagreened sculpture is verj- 

 peculiar, at once distinguishing it from the European form, and as descriljed by Adams 

 and Angas in res^^ect of Pecten tasmanicus, which, I believe, will prove to belong to the 

 same species, it is very like that of Pecten hifrons. The auricles are very unequal, 

 notwithstanding the statement of Messrs. Adams and Angas to the contrary, whose 

 figure, moreover, depicts them of diff"erent dimensioias, but not so unequal as in the 

 types figured by Sowerby and Reeve, and in a single specimen from Ta^^mnnia in tln' 

 British Museum. 



The ribs are somewhat variable in number, and the colour of the left vahe is rather 

 inconstant. The right valve appears to be always white, or only a little tinted with 

 purple-pink. The interior of the valves in a great measure corresponds in colour with 

 the exterior, the right being purplish-pink and the left chiefly white. 



I am not sure that Pecten tasmanicus is the same species as Pecten undulatus, fur 

 the fine riblets, judging from the figure, appear to be coarser ; but the locality and 

 microscopic sculpture, being similar, point to the conclusion that they are both forms 

 of one rather variable species. 



Pecten leopardus, Reeve (var. Solaris). 



Pecten leopardus. Reeve, Concli. Icon., vol. viii. pi. xxxii. fig. 1 15. 



Perten leopardus, Smith, Report "Alert" Coll., p. 114. 



Var. = Pecten kuhnholtzi, Bcrnardi, Journ. Conch., 1860, vol. viii. p. 378, pi. xiii. fig. 1. 



Var. = Pecten Solaris, Sowerby («o« Born) Tlies. Conch., vol. i. p. 55, pi. xii. figs. 7, 8, 22. 



Pecten Solaris, Dunker, in Philippi's Abbild., vol. i. p. 202, pi. ii. fig. 2. 



Pecten Solaris, Reeve, op. cit., pi. xxiii. fig. 92. 



Habitat. — Station 208, off" the west coast of the Island of Luzon, Philippine Islands, 

 in 18 fathoms ; blue mud. 



The typical form of this species was collected on the coast of Queensland. The 

 variety kuhnholtzi is New Caledonian, and var. solan's has been found at .Amboina 



