Jordan and Evermann. — Fishes of North America. 2059 



spot on base of pectoral. Kamchatka. This account taken from 1 of the 

 type specimens presented * to the Leland Stanford Junior University 

 Museum by Dr. CoUett. (Named for Charles Henry Gilbert.) 



* The following is TJr. Collott's desoript ion : First dorsal 8 ; .second dor.sal 8 or 9 ; anal 10 

 or 11 ; pectoral 15 to 17 ; lateral line 38. The body is very elongated and compressed, rather 

 high in Jroiit, and tapering to the tail. Its height (from vcntrals to first dorsal scale) 

 equals the h-ngtli of the snout, and is contained iti Ihr lut.il h'ngth about 8 times. The 

 tailis((.iiipn-.ss(.(l,longand slender; its heigliteveiyw 1m r. i;r. iter than its breadth. The 

 head: Its IcngI li i.s containcci in full-grown spcciim iis t tmics, in younger ones about 3J 

 times in the total length (caudal included). Thus iu 4 spci iuiens of different sizes the 

 proportions are the following: Total length 18:j mm., head length 3-66 times; total length 

 2.">4 mm., head length :!-7:! times; total length 277 mm., head length 4-01 times: total 

 length 290 mm., head length 4-(l-.! times. Snout very long, 3 times longer (or more) than 

 theintiTiirliital sip:ice (lietween the bases of the supraocular spines). PosUrior i)iirt of 

 the he;id coiiiiiaratn i'l.\ smoui li, the interorbital space rather concave; n(i(|u;i<lraiigular 

 pit on thr (iccipiit \\\ fnmt of I Iji- dorsal scales. Eye comparatively large : the horizontal 

 diametir ;i litth' l;in:i-r lli:in tlic vertical. It is containea a little more than '1 tinirs in the 

 length of tlie snout, and rather more than 4 times in the lengtli of tin- liea.l. Cirri on 

 lower sidt! of snout (in front of the premaxillar\ ) and ai the anuli' c.l' tlic jawsj 'I'licir 

 length e.pKils Unit of the eve. Mouth entirely inferior ; distance fioni |ircnia\iil;nics to 

 tip of rostnl spines alniut .■((ual to the length of the eye. I'.eth ia th«-.jaws, vomerim^ or 

 palatine teeth mine, .\iiiiature of the head mucli like tli;it of J.. act>/oi«erwi«.s-. The 

 rostral si.iiies 4, 1' luejei ting horizontally forward. _' il>eliiiid the first) curved backward. 

 A third jiair on the siiniit (much nearer the eye tlian the rost lal spines). Orbital ridge 

 with ii smule sjiine isupiaociilar, noprrocnlar) , the ln\\erri(fue linelv serrated. Occipi- 

 tal ridges, o]ierculuiii, and ]ii-eiiiiereuliim as in .1 .,/,■,/<, /,.sr(///i/.v. hilt th.' spines more 

 pointed and longer. Suborbital with a doitlde j-id-e at its lower m:iri;i]i, the upper ridge 

 with 2 distinct 8]jiues liehind, andatliird (soniei inies indisliiKl) atei|ual distance from 

 the eye and the tip of the snout. Head \\\{\\ ahoui isdistin.i spine , alin..;cther. Arma- 

 ture of body: Plates on the back and sides of t he sani. iniiiiher as m .1 . (oi7),„,v,cum.<f, but 

 the spines are longer and curved more hack\wird. and stuni- .'v ei \ w hen- Irom head to 

 caudal. Between the 2 dorsal keels and between tliu J lateial keels there aii! no traces of 

 another keel (as in A. vulsns). Breast with about 10 polygonal idates, 4 of which form a 

 series on each side and 2 a median series : bases ot pectorals and ventrals also surrounded 

 with plates. All the plates have a short spine in their center. Dorsal plates numbering— 



From occiput to first dorsal (pair) . . 4 



First dorsal extending over do 8 



Between the dorsals do 3 



Second dorsal extending over do 9+1 



From second dorsal to caudal (single).. 15 



The dorsal keel (coalescing with the keel on the other side at the fifteenth plate in front 

 of the caudal fip) is consequently composed of 38 or 39 plates ; the lower lateral keel 

 extending from lower base of the caudal to base of the tenth pectoral ray, contains 35 

 plates. Abdominal plates numbering — 



Plates. 



From ventrals to anal (pair).. 11 



The anal extending over do 10 



From anal to caudal (single) . . 17 



The abdominal keel (coalescing at the seventeenth plate in front of the caudal) is formed 

 by a series of 38 plates. Lateral line distinct; 38 pores. Fins: In the 10 specimens at 

 present preserved in the museum at Christiania, the fin rays are the following ; 



1 D. 8 2 D. 8 A. 10 P. 17-17 



8 9 10 M6 



8 9 10 16-16 



8 8 10 15-16 



8 8 10 17-17 



8 8 10 17-17 



8 8 10 16-17 



8(-fl) 8 11 16-17 



8 8 10 15-16 



8 9 10 17-17 



First dorsal begins behind the fourth dorsal plate and has 8 rays (1 specimen has an 

 additional slender ray in the space between the 2 dorsals). Its height equals its distance 

 from the head. It extends over 8 scales; the first 2 rays in the space between the fourth 

 and fifth plate. The dorsal fins are separated by 3, sometimes by 4 plates. Second dorsal 

 has 8, sometimes 9, rays, and extends over 8 plates ; behind the last rays is 1 pair of plates 



I All the specimens are in a bad state of preservation and most of the barbels are lost. 



