222 



PROCEEDINGS OF THE NA TIONAL MUSEUM. 



Head, 3 in length to ba.se of caudal; depth, If. Upper eye, 6 in 

 head; maxillaiy, 3f ; snout to upper eye, 4^. 



Gape nearly straight, curved down under tip of snout. Teeth 

 bluntly pointed and irregular; in a single uneven row on eyed side of 

 mandible, which is straight and higher than the curved, blind side of 

 mandible, and shuts well past and within the premaxillary teeth of the 

 eyed side; in 2 uneven rows on blind side of mandible, those of the 

 outer row nuich the larger; in two rows on premaxillary of Idind side 

 similar to those of blind side of mandible; and in two very irregular 

 rows on premaxillary of eyed side similar to the small inner row on 

 blind side. Maxillar}^ of eyed side reaching to opposite front of pupil; 

 its length two-thirds of that of blind side, which reaches almost to 

 posterior margin of e^^e and is contained 2^ times in head. Interor- 



FlG. 20. — CLIDODERMA ASI'EREIMUM. 



bital space very narrow, but not sharp, continued })ack as a blind ridge 

 ])ehind upper eye. Gill rakers short, conical, and sharp, their number 

 4+10. 



Origin of dorsal on blind side opposite front of e3'e and on a level 

 with posterior' nostril of blind side. Highest dorsal rays 2f in head; 

 a little shorter than highest anal rays. Pectorals l)roadl3' rounded; 

 that of eyed side 2i in head, that of blind side 2|. Caudal rounded 

 or double truncate. Body and everywhere on head, including snout, 

 mandible, maxillary, and interorbital space, very rough with close-set 

 bony plates. Larger plates, their tops more conical and extending 

 above the others, are arranged in 5 or 6 rather definite longitudinal 

 series. The bases of all the fins on eyed side and the surface of the 

 eyeballs with fine, rough plates. Lateral line with a low curve ante- 



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