468 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



tipped spines. A spine-ariued ridge in front of the eyes, over tlie top 

 of the snout. In this four spines are conspicuous, one in front of each 

 eye, and between these a hirger ])air, in front of the supraorbital ridges. 

 From these last-mentioned spines extend spine-armed ridges along the 

 upper margins of each orbit. Under the snout is a cavity containing a 

 barbel, pedicelled, with thick, club-shaped, trilobate tip. On each side 

 of this cavity are the nasal openings. 



The width of the mouth is equal to the distance between the centers 

 of the pupils of the eyes, this being mu(;h less than in HalieiUcca stellata, 

 in which the mouth is proportionally twice as large. The shape of the 

 disk is less circular than in the Asiatic species, being intermediate be- 

 tween this form and Halieutichthys. Other points by which H. stellata 

 may be distinguished are the absence of the strong lateral spines of the 

 disk; the slighter specialization of the carpal peduncles; the greater 

 proportionate size of the disk, which occui)ies two-thirds of the entire 

 length of the tish; the less immediately axillary position of the gill- 

 openings; the less spiny armature of the body, the spines upon the 

 margin being smaller and less crowded ; and the entire absence of 

 spines upon the ventral surface. 



D. 6; A. 4; C.8; P. 13-15; V. 5. Color reddish gray, whitish below. 



Measurements. 



Current number of specimen. 

 Locality 



26175. 

 Station 895. 



MiUi- 

 metera. 



lOOths 



of 

 length. 



Extreme length 



Length to base of middle caudal rays 



Uody : 



Greatest width of disk 



Length of disk (snout to lateral spine) .... 



Length of disk (snout to angle of pectoral) 



Least height of tail 



Length of body (outside of disk) 



Head: 



Greatest length (to branchial opening) 



Width of interorbital area , 



Leniith of snout 



Width of mouth 



Length of maxillary 



Lent h of mandible 



Diameter of orbit 



Dorsal : 



Distance from snout 



L( until of base 



( ircatest licight 



Ty^uuth of rostral barbel 



Aual: 



Distance from snout 



Length of base 



Height at longest ray 



Caudal : 



Length of middle rays 



Pectoral : 



Distance of tdbow from snout 



Length 



Ventral : 



Di.stance of frc^e ]);.r; ion from snout 



Length 



Dorsal 



Anal 



Caudal 



"Pectoral 



Vcntrsl 



HO 



118 



50 

 47 

 47 

 h 

 40 



39 



8 

 4 



It) 

 9 

 10 



8 



CO 

 8 



14 

 2 



C5 

 5 

 14 



52 

 24 



35 



12 



G 



4 



8 



13-15 



5 



