Bulletin 34 40 



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

 6, 6a, 1886. 

 solidiila 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 (5". 5. Blake). Tj-pe locality off 

 Pernambuco, Brazil, in 675 fms. (5. ^. Challenge?). 

 subsequilatera Jeffrej-s, Proc. Zool. Soc, p. 579, pi. 56, fig. 3, 

 1879. 

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



1886. 

 Yoldia szibequilatera 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 the}^ seek cold temperatures, — the genus being 

 typical of Arctic and Antarctic Seas. 

 hebes Smith 



Leda hebes 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 ijitermedia Sars {Portlandia inteniiedia 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). 



