596 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1908. 



and pectoral members are not extended laterally as in the preceding, 

 but the form is oblong, the head truncate forward and with a very 

 spacious rostral cavity provided with a wide and complicated tenta- 





Wi% 



M 



Pig. 39. — Dibranvhus uthinUvus. After Goodc Jind Bean. 



cle, and the pectoral members are less free and divergent from the 

 body than in other Ogcocephalids. Another remarkable character- 

 istic is the vei-y backward position of the branchial apertures within 

 the axilla? of the pectoral members, so that they are much nearer to 



