Jordan and Evcrmann. — Fishes of North America. 2'431 



about eye and on opercles; longest dorsal spines 2\ to 3 in depth of Lody, 

 last spines shorter and stifl'er than others; dorsal and anal slightly joined 

 to caudal; pectoral as long as caudal, about 1^ in head. Head naked. 

 Brown or grayish, with faint spots or marblings; 1 or 2, rarely 3, dark 

 ocelli on the dorsal; 3 or 4 dark streaks radiating from eye, the upper- 

 most joining its follow. Length 10 to 15 inches. Coast of northern Japan 

 and sea of Okhotsk, north to the Kuril Islands. Our specimens, 5 in num- 

 ber, the largest 25 cm. long, from Shana Bay, Itnrup Island. Steindach- 

 ner's excellent and detailed description leaves nothing to be desired, and 

 corresponds perfectly with our material except in the character of the 

 scales. A careful examination of these under high magnirtcation fails to 

 show that they are "amhinteren Randemit kurzen Ziihnchen bcwaftuet." 

 The jiosterior border is entire and the scales strongly marked with con- 

 centric stria'. Dorsal spines number 62, 63, 63, 64, 64. Dorsal ocelli pres- 

 ent in all our specimens, 2 of them being faintly visible even in the 

 youngest, 55 mm. long. Fholidapus (jrebnitslii s<'ems to differ only in the 

 shorter dorsal fin (57 spines). (Named for Professor Dybowski, its first 

 collector.) 



Ceiitronotus dyboioskii, Steindachner, Ichth. Beitrage, ix, 22, 1880, Gulf of Strietok, 

 northern Japan (Coll. Prof. Dybowski) ; Jordan & Gilbert, Kept. Fur Seal Inve.st., 

 1898. 



IPhoUdapus grebnitskii,* Bean & Bean, Proc. U. S. Nat. Mus. 1896, j)!. 34, 390, Yezo, Japan. 

 (Coll. Col. Nicolai A. Grebnitski.) 



915. PLECTOBRANCHUS, Gilbert. 

 Plectobranchus, Gilbert, Proc. U. .S. Nat. Mus. 1890, 102 (evides). 



Teeth conic, on jaws, vomer, and palatines, some of them canine-like. 

 Body scaly; lateral lino obsolete, its course indicated by a lighter streak 

 on middle of sides. Gill slits not continued far forward, the membranes 



* PhoUdajnis grehnitskii. Bean & Bean, is thus described: Tlie .specimens are 141 mm. 

 long, including caudal; 126 mm. to ba.sc of caudal. The head (22 mm.) is equal to the 

 greatest depth of body. Tbe eye is slightly longer than the snout and ^ a.s long a.s the 

 head. The interorbital space'is narrow, f of the length of the eye. Tbe naked head 

 re.sembles that of 1'lioli.t, its length is contained about 5^ times in "total length without 

 the caudal. The mouth is small and very oblique; the mandible is slightly included and 

 has a well developed lip. The maxilla is partly concealed under the preorbital bone; it 

 does not quite reach to below the anterior margin of the pupil. The anterior nostril is 

 midway between tli(! eye and tlu^ tip of tbe intermaxilla. Seven mucous pores around 

 the orbit; 3 on the preorbital bone. The pore in the origin of tbe semicircular dark band 

 around the nape is continued hackw.ird by a series of 6 similar ones ending near the 

 upper angle of the gill opening. A series of 10 or 11 pores beginning near the front of the 

 chin on e.ich side, extending backward and curving upward to tbe ui)pcr anterior edge of 

 tbe operculum. Tbe gill membnines are broadly united, but they are not joined (o the 

 isthmus. The dorsal origin is over tbe end of iho head; the fln is low, and consists of 



r third being slightly longer than the eye. 

 snout contains the head length 2} times. 



.^ „ , rays longest posteriorly. The caudal is 



rounded, and is barely separated from the dor.sal and anal. The pectoral base is broad, 

 and the fin is g as long as the head. The intestine is slender, and is more than twice as 

 long as the bead. Stomach short, pearsbajied, with 6 slender pvloric cax^a of unequal 

 length, tbe longest about twice as long as the eye. The body is "comjiletely scaled, the 

 scales very small, cycloid, closely imbricated, with numerous comentric stria>, and they 

 extend halfway up the membrane connecting the dorsal spines. The gener.al body color 

 is brown, the sides sparsely and vaguely mottled. The pectorals are pale. A liarrow, 

 dark band extends from tlie middle of the eye downward and forward, a similar band 

 running backward from the eye on the preopercle ; an interrupted semicircular band from 

 eye to eye across the unpe. 1). LVII ; A. II, 39 or 40. (Tlie species is n.amed for Mr. N. 

 Grebnitski, to whoso industry and zeal the Museum is indebted for many valuable col- 

 lections. Bean & Bean. ) 



iBtmuus. iiie (lorsai ongin IS over tlie end or ine 

 spines, the longest and strongest in the posterior tl 

 The distance of the vent from the tip of the sr 

 The anal is slightly lower than the dorsal, the r.i- 



