380 REVISION OF SEBASTmm—EIGENMANN AND BEESON. vol. xvii. 



/(/(. Cranium witli many ridges all ending iu spines. Branchiostegals 

 (except in A. aurora, S. prorUjer, and S. rufiis) and usually 

 the lower jaw naked. Pores of lower jaw, except iu Ancto- 

 spina, Ycr^- large, conspicuous, slit-like. 

 i. Postocular and tympanic splines botli present. Lower pectoral 

 rays thickened (except in Sehastomus riifiis). Interopercle 

 and suhopercle usually Avith spines. 

 ;. Coronal spines, nuchal spines; a spine below, another in front 



of eye Genus. (?) (single species matzubar^), VII. 



.;)■. Coronal spines not developed Seuastomus, VIII. 



ii. Postocular spine not developed ; interopercle and suhopercle 

 each with a spine at their aiiproximated corners. 

 Ic. Coronal spines not developed ; lower pectoral rays usually 

 thickened ; interorhital usually with a groove in its middle. 

 The large pores (4) along each ramus of the lower jaw open. 

 Maxillary, mandible, and brauchiostegals usually naked or 



with minute embedded scales PxERoroDiTS, IX. 



I'k. Coronal spines developed ; interorhital with aniedian ridge; 

 gill-rakers long; lower pectoral rays normal, not thickened 

 and fleshy. Pores of lower jaw (in anriculatus) entirely 



closed by a thin membrane Auctospina, X. 



cc. Palatines without teeth. Preocular, supraocular, postocular, tympanic, 

 parietal, nuchal, and coronal spines developed. Suborbital 

 stay with a sharp spiniferous ridge Sebastopsis, XI. 



I. Genus SE 13 A ST O L OB U S , Gill. 



Sebastolohus, Gill, Eep. Smithsonian Institution, 1880 (macrochir). 

 Tyi'E. — Scbastes macrochir, Gunther. 



This geuus is known from tAvo species found iu deep "vvater. It is 

 characterized by the position of its veutrals and by the peculiar shape 

 of its pectorals. The upper rays are the longer and the lower five are 

 thickened and jirolonged beyond the membranes much as in many 

 species of Pteropodus, Sehastiehthys, and other genera. 



ANALYSIS OF THE SPECIES OV SEBASTOLOBl^S. ' 



a. Second anal spine one-seventh of the length ; highest dorsal spine, 2| in the 

 head; eye 1^ times as long as snout; a large black si)ot on the posterior half 

 of the spinous dorsal, and another between the anal spines. D. XV, 6-9; A. 

 Ill, .5. Lat. 1, ca. 45 (Gunther) macrochir, 1. 



aa. Second anal spine one-fifth of the length; highest dorsal spine three in head; eye 

 twice as long as snout; a dark blotch on membranes between first and third 

 dorsal spines, and one from sixth to eleventh spine (Beau) alascanus, 2. 



1. SEBASTOLOBUS MACEOCHIR (Gunther). 



Sehastea macrocldr, Giintheu, Ann. Mag. Nat. Hist. (4), xx, 434 (Japan'); id., 

 ChaUenger shore lishes, p. 65, pi. xxvli, 1880 (Inland Sea of Japan, off Inosima, 

 345 fathoms). This species, first described from Japan, has been found to 

 be quite abundant oft" the coast of the United States. 



2. SEBASTOLOBUS ALASCANUS, Bean. 



Sebastolohus alascanus, Bean, Proc. U. S. Nat. Mus., xiii, 1890, p. 44 (1891). (Oft' 

 Trinity Island, West Long. 154°, North Lat. 56°, at a depth of 159 fathoms.) 

 It is probable that this is only the young of macrochir. 



