8 



Bulletin 34 



40 



solidulaE. A. Smith, Challenger Rept., Lam., p. 233, pi. 19, figs. 



6, 6a, 1886. 



solidula Dall, Bull. Mus. Comp. Zool., vol. 12, p. 250, 1886 ; 

 Bull. 37, U. S. Nat. Mus., p. 44, 1889. 

 Distribution. — Deep water, 640 to 1002 fins. Dredged in 

 southern limits of Gulf of Mexico at Yucatan Strait and 

 at Cape San Antonio (S. S. Blake). Type locality off 

 Pernambuco, Brazil, in 675 fms. (S. S. Challenge?). 

 subaequilatera Jeffreys, Proc. Zool. Soc, p. 579, pi. 56, fig. 3, 

 1879. 



subcequilatera Dall, Bull. Mus. Comp. Zool., vol. 12, p. 252, 

 1886. 



Yoldia subequilatera Dall, Bull. 37, U. S. Nat. Mus., p. 44, 

 1889. 



Leda sicbequilate?-a Dall, Trans. Wagner Inst. Sci., vol. 3, 

 pt. 4, p. 582, 1898. 



Distribution. — Norway to Grenada Island in 92 to 1731 fms. 

 Gulf of Mexico, Western Florida region (Dall). 



Genus YOLDIA Moller 



Recent Yoldias in the Gulf of Mexico are all restricted to deep 

 water, as they seek cold temperatures, — the genus being 

 typical of Arctic and Antarctic Seas. 



hebes Smith 



Ledahebes E. A. Smith, Challenger Rept. Lam., p. 234, pi. 



19, fig. 7, 1885. 

 hebes Dall, Bull. Mus. Comp. Zool., vol. 12, p. 252, 1886. 

 Yoldia hebes Dall, Bull. 37, U. S. Nat. Mus., p. 44, 1889. 

 This resembles the North Pacific and circumboreal species, 

 Yoldia i?itermedia Sars (Portlandia intermedia Sars, Moll. 

 Reg. Arct. Norv., p. 38, Tab. 4, fig. 9, 1878), but is dis- 

 tinct. 



Distribution. — Western Florida to Culebra Island, in 196-805 

 fms. Off Cedar Keys, Florida (Dall). 



