462 



PROCEEDINGS OF THE ACADEMY OF 



[Dec, 



spout-like at middle, with denticles obsolete. Innermost teeth of disk, 

 or those along each side of orifice, bicuspid, large, and similar to those 

 on supraoral lamina. 



Differs from both Bathymyzon and Petromyzon in the above com- 

 bination of characters. One species in the open Atlantic, possibly- 

 occurring at some depth. 



('iixea^os'^ ocean; //'^w, to suck.) 



Oceanomyzon wilsoni sp. nov. Fig. 1. 



Head to first gill-opening 6f ; depth 13|^; width of head at first gill- 

 opening about 2 in its length; snout 1^; width of disk ly"^; inter- 

 orbital space 2^; height of first dorsal 6^; height of second dorsal 3; 





Fig. 1. — Oceanomyzon wilsoni Fowler. (Type.) 



eye 3 in interorbital space; tail measured from vent to end of caudal 

 fin (damaged) about 3 in rest of body. 



Body well compressed, rather slender, flexible, tapering backwards 

 from pharynx, with greatest depth a little after last gill-opening. A 

 median broad obsolete ridge down back from about opposite first gill- 

 opening to first dorsal. Lower surface of body rounded convexly. 

 About 72 muscular bands between last gill-opening and vent. Tail 



