BULIvETlN 34 4^ 



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

 6, 6a, 1886. 

 solidtda 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 fms. Dredged in 

 southern limits of Gulf of Mexico at Yucatan Strait and 

 at Cape San Antonio (^S. S. Blake). Tj-pe locality off 

 Pernambuco, Brazil, in 675 fms. {S. S. Challeyige?). 

 subaequilatera Jeffre5^s, Proc. Zool. Soc, p. 579, pi. 56, fig. 3, 

 1879. 

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



1886. 

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

 1889. 



Leda subequilatera 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 

 tj^pical 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, i! 

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

 This resembles the North Pacific and circumboreal species, 

 Yoldia intermedia Sars i^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). 



