105. CIIIKID^ HEXAGEAMMUS. 641 



/. Gill-membranes scarcely uui ted ; sj)i nous dorsal greatly elevated in front; 



scales very rongh. {ZaniolcpUuv) Zaxiolkpis, 353. 



ff. Gill-membranes broadly nuited; dorsal spines low, stiif; head poiu-ted. 



{OxijUhlUue) OXYLKBIUS, 354. 



dd. Gill-membranes united to the narrow isthmus; preopercle unarmed; anal 

 spines weak or obsolete. 

 g. Dorsal lins connected. (Afjrammina'.) 



h. Anal* comparatively short, its rays about 12; palatine teeth present. 



Mykiolepis, 355. 

 gg. Dorsal fins widely separated; body and head rather slender. (Aiwplo- 



pominw) Axoplopoma, 356. 



• 



351.-HEXAGRAITIItIUSt Steller. 



Eoclc-tront. 



{CMrus Steller: Lahrax Pallas: Acantlioleh'uis Gill: CkiropsiH Girard.) 



(Steller; Tilesius, Act. Acad. Petropol. iiji335, 1810: type Hexagrammiis asper Steller.) 



Body oblong, somewliat compressed. Head subconical, blunt in 

 profile. Month rather small, horizontal; jaws with bands of moderate- 

 sized, conical teeth, the outer row enlarged; teeth on vomer, and usu- 

 ally a small patch on the palatines; preopercle unarmed; a fringed 



* Anal rays about 20 in Agrammus schlegeli, a Japanese species. 



tThe following species from the coast of Kamtschatka, related to Ilexagrammus, 

 have been made the types of distinct genera. These genera may be valid, if the 

 characters assigned are correct, which is doubtful : 



GRAMMATOPLEUEUS Gill. 



(Gill, Proc. Acad. Nat. Sci. Phila. 1S61, 1(56: type Lahrax lagocephahis Pallas. 



Distinguished from Hexagrammus by the cycloid scales, {ypa^i-irj, line; nXsvpov, 

 side. ) 



G. lagoceplialns (Pallas) Gill. 



Five lateral lines; mouth rather small; color golden-brown. D. XX-24; A. 22. 

 Kurile Islands. 



{Lahrax lagocephalus Pallas, M«5m. Acad. Petersb. ii, 384, 1810: Chirus lagocephalm 

 Giinther, ii, 92.) 



OCTOGEAMMUS Bleeker. 



(Bleeker, Versl. At. Amst. vi, 1370: type Lahrax octogrammus Pallas = Oc/o/y/'rtmjnMS 

 pallaai Bleeker.) 

 Distinguished from Hexagrammus by the union of the gill-membranes to the isth- 

 mus (?). {oHto, eight; ypani-ir}, line.) 



0. paUasi Bleeker. 



Olivaceous; back and sides spotted; belly yellow; pectorals hyaline; ventrals 

 black at tip: four lateral lines; mouth moderate; scales strongly ctenoid; body 

 elongate; dorsal deeply notched. "Flabella branchio stega divisa." D. XIX; A. 

 24. Kamtschatka and Aleutian Islands. 



(Lahrax octogrammus Pallas, I. c. 393: Chirus octogrammus Giinthesr, ii,.92; Bleeker, 



1. c.;=^IIexagrammu8 dccagrammus'i) 



Bull. Nat. Mus. No. 16 41 



