Below is a short description of one of the examples in the Zool. Inst, of 

 the Akad. Nauk. SSSR. 



D X, 101, P 20 V 7 Gill rakers ^ 



3 plus 11 



Head 5 in total length . Eye large, 4 times in head, equalling snout, which 

 protrudes as a short rostrum. Over the upper jaw a deep cleft which becomes a 

 deep cavity on each side of the rostrum, continuing up and back to tJie nasal 

 davity, but is not connected with it. Nasals of only openings, the posterior the 

 larger . Both close to each other and open into a common shallow cavity in the 

 back of which are 10 leaf shaped elements . Suborbital shelf weak Ridges on upper 

 part of rostrum (middle and paired lateral) are well developed. 



Mouth large, upper jaw extending to vertical from posterior of eye. Teeth 

 on jaws strong and sharp. Posteriorly in upper jaw, a single row, increasing in 

 size to the front and in two rows . Teeth on outer row slightly enlarged, hmer 

 teeth slightly curved inwards. On lower jaw all teeth large, sharp, pointed 

 posteriorly in one row. Vomer and palatine without teeth. Barbel on lower jaw 

 short and thin . 



Gill openings very large, continuing anteriorly, divided at the point gill 

 membranes connect by a narrow bar . First gill arch connected to inner side of 

 gill cover by a thin elastic membrane, leaving a pore 3/4 diameter of eye . On 

 outside ^of row of gill arches are 5 tubercle -shaped elements, injier row con- 

 sists of 3 plus 11 short fat gill rakers covered with small spines. Tbp of 

 head with noticeable cavities . Interorbital very wide, flat, sli^tly larger 

 than diameter of eye. Scales quite lalrge, without spines, having three radii 

 posteriorly. They cover the entire body; on head becoming smaller. 



Lateral line mediolateral, black . First dorsal not high (its hei^t equal 

 to length of upper jaw), well separated from second dorsal. First dorsal spine 

 weak, not serrated. Pectoral large, reaching to anus . Pectoral length 60% of 

 head. Ventrals anterior, their origin in front of pectoral base. 



Pyloric caeca long, thin, 12 . Female in the 6th stage of sexual maturity is 

 805 mm. Ovaries paired, containing remnants of unspawned eggs. Lobes of liver 

 long, asymetrical (left lobe longer than the right; it reaches to anus) . Body 

 uniformly grey . Fins darker . Lining of mouth and gill cavity and peritoneum dark . 



Measurements in percentage of total length . Head 19.9, depth of body at 

 anal base, about 15.5, preanal33.4, preventral 19.4, predor sal 22.2, pectoral 

 length 11.9, ventral lengdi 7.4, Measurements in percentage of head. Eye 25.0, 

 snout 25.0, upper jaw 42.5, lower jaw 46.3, interorbital 27.5, distance between 

 ventral and anal 71.9, height first dorsal 41.9, distance between dorsal fins 17.5. 



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