302 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



41. ALCICHTHYS ALCICORNIS (Herzenstein). 



BEROKAJIKA. 



Centridermichthys alcicomis Herzenstein, Zool. Mus. Kais. Akad. Wiss. St. 

 Petersburg, XTIT, 1890, p. 115; Yeso (Hokkaido). 



Head 2f in length without caudal; depth 5^. Dorsal X-IT; anal 

 13; lateral line 36. E3'e 6 in head; interorbital width 10; maxillary 

 2; snout 3i; first dorsal spine 3^; third dorsal spine 2^^; longest dorsal 

 rays 2^; longest anal rays 3; pectoral li; ventral 3|; caudal If. 



Head not depressed, about as wide as deep; body slender, slightly 

 compressed posteriorly. Mouth large; lower jaw included; maxillary 

 reaching to below posterior margin of eye. Small, sharp, conical 

 teeth on jaws, vomer and palatines; the palatine patch about as wide 

 as that on mandible; the vomerine patch narrower. Interor])ital space 



Fig. 31. — ALcicHTiTi's alctcoenis. 



moderately concave. A slight low ridge runs hack from interor])ital 

 and curves outward on top of head to occiput. Processes from pre- 

 maxillary strongly produced; nasal spines on each side of it well 

 developed, triangular, not very sharp. Preopercle spine spreading 

 out flat and wide, and divided into from 3 to 5 diverging points 

 directed more or less upward; below it are 3 sharp points, growing 

 larger downward, and all directed downward. Lower end of sul)- 

 opercle angulated and rather sliarp. A w4de nmltitid flap over poste- 

 rior part of eye, a simple tentacle on middle of ridge on top of head, 

 and a similar one at end of ridge on occiput. These are usually simple 

 but frequently one or more of them are bifid. 



Dorsals close together but not connected. Tips of spines when fin is 

 depressed reach slightly past first dorsal ra}. Tips of last dorsal rays 



