FISHES FROM SAKHALIN. 



245 



.spines. Mead much depressed ; eye moderate, directed slightly upward. 

 Interorbital rather wide, slightly concave, without ridges. Mouth large, 

 horizontal ; jaws subequal. Conical teeth in rather wide bands on jaws 

 and vomer ; none on palatines. The band on the vomer curved, its 

 greatest width a little less than horizontal diameter of eye. The band on 

 the upper jaw widened anteriorly, but on the lower jaw nearly not widened. 

 Maxillary extending to below postorbital rim. Nostrils each on a short 

 tube. Nasal spine rather sharp ; no suborbital spine. Pöstorbita] spine 

 with a very small flap, sometimes absent. Postorbital ridges somewhat 

 converge posteriorly, abruptly bending near the end ; a shorter ridge 

 outside of them as usual. 4 preopercular spines ; the first one rather 

 long, curved a little upward ; the second one directed outward and back- 

 ward, two-thirds the upper one in length ; the two lower ones concealed 

 in the skin. Suborbital stay distinct, without spines. Post-temporal spine 

 ar.d upper opercular spine distinct, ending at the same vertical. Opercular 

 spines 2, the lower one shorter than the upper. Humeral spine distinct. 

 Subopercle spine and interopeicle spine concealed in the skin as in 

 Poroco'tus nigrescois. Gill-membranes confluent, forming a narrow fold 

 across the isthmus. Gill-rakers on the first gill-arch 2 + 6 to 7, stumpy. 

 No slit behind last gill. 



Top of head sparsely beset with hard warts, the sides scarcely 

 warty. No plates on head. ;.. Skin of body with some scattered rough 

 tubercles, arranged in some two or three longitudinal rows ; these rows 

 converge posteriorly, unite into a single row on the posterior part and end 

 near caudal base. Below lateral line very few scales or none. Lateral 

 line complete, with small concealed scales in the anterior part. 



In male, first dorsal separated slightly from second dorsal, the spines 

 nearly reaching origin of second dorsal when depressed ; the spines 

 flexible, high, the longest spines about 2 in head ; the membrane scalloped 

 between spines, the outer margin rounded in general contour, adnate to 

 body behind the last spine. Second dorsal very high, the longest rays a 

 little longer than the length of head ; when depressed the tips reaching 

 past half caudal ; the membrane behind the last ray adnate to body. 



