PROCEEDINGS OF THE NATIONAL MUSEUM. 379 



ANALYSIS OF TnE PACIFIC COAST GENERA OF SEBASTIX.K. 



. Vertebrae 21 or more (Sebastin/E). 



h. Dorsal spines 14-1(3; the lower pectoral rays thickened, imbrauched, and pro- 

 duced; ventrals directly under pectorals. Suborbital stay 



strong, spiniferous Sebastolo jsus, I. 



hh. Dorsal spines 13; vertebra 27. 



c. Palatines with teeth. Lower pectoral rays unbranched, tlieir tips i)rojectin<»-. 

 (J. Pari«!tals meeting above the supraoccipital, * except sometimes hi I'limo- 

 npina. 

 e. .laws e(ju:i] ; head narrow above; high and prominent cranial keids end- 

 ing in spines. Preocular, supraocular, tympanic, and parie- 

 tal present. Gill-rakers usually short, spatulate or clavate, 

 their broadened tips spiniferous. Scales usually very 

 strongly ctenoid; accessory scales numerous; suborbital 

 stay directed oblitjuely downward and backward; second 

 anal spine much heavier than and at least as long as third. 

 Body short and deep, back arched, mouth very large but 

 rather narrow, head heavy. Inter- and snb-opercle without 

 spine. Branchiostegals and lower Jaw naked. Three or 

 four large pores along each ramus of the lower jaw. Species 



usually with cross bands Sebastichtiiys II. 



ee. l^ower jaw much projecting; head broad, skull usually convex; cranial 

 ridges when present usually low. (iill-rakers very long and 

 slender; scales usually smooth, few if any accessory scales. 

 Branchiostegals and lower jaw scaled. Pores of lower jaw 

 concealed except in some species of Acutomentum. 

 f. Preocular spines well developed. Peritoneum black. 



<j. Postoculaf spine i)resent. Supraocular, tympanic and occipital spines 

 well developed. Second anal spine stronger and usually 

 longer than the third. Synipliyseal knob strong, projecting 

 forward. Dorsal low. Lower pectoral rays normal, not 

 thickened. No spines on inter- and sub-opercles. (Mandi- 

 ble and maxillary scaled) Acutomentum, III. 



tl<j. Postocular spines not developed. Supraocular and tympanic some- 

 times present, always concealed by the skin. Occipitals 

 ending in spines or not. Interorbital wide, convex, l^ower 

 pectoral rays thickened, their tips projecting beyond the 

 memlnane. P.ones of the skull striate and pitted. Mouth 

 small, narrow. Spines on inter- and sub-opercle sometimes 



present. Peritoneum black Pkimospina, IV. 



//■. Preocular without spine; skull smooth, without spines. Lower pec- 

 toral rays normal. No spines on inter- or sub-opercle. I'er- 



itoneum usually white Sebastosomus, V. 



id. Parietals separated by the supra o<;cipital.t 



//. Cranium with ])arietal ridges only. Lower jaw much projecting, 

 entering the prolile ; a prominent sympbyseal knob directed 

 forward. Head broad, convex. Interorbital convex, nearly 

 smooth. Lower pectoral rays normal; no S2iines on inter- 

 aud sub-opercles. Ex])osed branchiostegals, maxillary and 

 m:nidil)les densely scaled. Pores of lower jaw concealed 

 l>y the scales Sebastode.s, VI. 



*See Sehasfomiis (I'reus and eJonrjatus. 



t Except in wreus and sometimes in elongafiin. 



