Jordan and Evermann. Fishes of North America. 2069 



AGONOPSIS CHILOEKSIS (Jenyns). 



B. 6 ; 1 D. 8 ; 2 D. 7 ; A. 8 ; P. 14 ; V. 3 (1, 2) ; C. 2-11-2. Interorbital space concave, a little 

 less than diameter of eye, with a pair of sharp minor longitudinal ridges terminating at a 

 transverse groove behind eyes. Snout does not project beyond, mouth; larger margin of 

 suborbital with an irregular ridge formed of bluntish tubercles, the last terminating in a 

 minute backwardly directed spine. Limb of preopercle with 3 diverging smooth ridges 

 dilating at their extremities into 3 flattened blunt points ; opercle with a smaller spine- 

 less ridge. Jaws about equal, the upper a little longer, with narrow bands of teeth; 

 teeth on front of vomer and a short imperfect row on each palatine. Gill membranes not 

 notched, attached to isthmus ; gill openings large. Barbels short, on chin, lower jaw, and 

 branchiostegal membrane (a pair also on under side of tip of snout in fig. 1, pi. 7). Tem- 

 poral and occipital riders present, formed of granulated tubercles (the occipital "tuber- 

 cles very plainly in the form of U pairs of spines in the figure) ; between occipital ridges 

 a slightly raised longitudinal line; a deep transverse depression at nape. Temporal 

 ridges end in a sharp point not prolonged into a spine. The carinated plates moresharply 

 serrate than in J . ctttajiftrachm, the spines curved. (All the plates spinous from head to 

 caudal in iig. 1, pi. 7.) Six slightly serrated scales forming on breast a somewhat trian- 

 gular patch, '2 single ones standing first, the 4 others in pairs. Second and third rays of 

 second dorsal largest ; anal under second dorsal; pectorals rounded, 5 in length; ventrals 

 scarely more than A of pectorals. Yent a little anterior to a line connecting the extrem- 

 ities of ventrals. Color in spirits, dusky gray above and on sides, paler below; a 

 blackish transverse band under front of first dorsal, 1 under anterior and 1 under poste- 

 rior end of second dorsal, 1 in middle of peduncle, and a trace of a fifth behind this; 

 body mottled in places Avith blackish, and the fins, except ventrals, are of the same hue. 

 (Jenyns.) Coasts of Chile and Patagonia, (chilocnsis, living at Chiloe, an island off 

 Patagonia.) 

 Aspidorphorus chiloensis, JENYNS, Zool. Voyage of the Beagle, Fish., 30, pi. 7, figs. 1, la, Ib, 



1840, Chiloe, west coast of northern Patagonia (Coll. Darwin) ; GAY, Hist. Chil. 



Zool., ii, 174. 



Aspidophorus niger, KROYER, Ichth. Bidrag. Naturhist. Tidsskr. 1, 238, 1844, Valparaiso. 

 Affonus chiloensiK, GUNTHER, Cat., n, 216, I860, Valparaiso. 

 Agonopsis chiloensis, GILL, Proc. Ac. Nat. Sci. Phila., XIII, 1861, 161. 

 Agonus niger, GUNTHER, Cat.,n, 215, 1860. 



770. AVERRUNCUS, Jordan & Starks. 



Averruncus, JORDAN & STARKS, Proc. Cal. Ac. Sci. 1895, 821, pi. 91 (emmelane). 



This genus is very close to Stelgis, with which it agrees in the rough 

 armature, the presence of cirri on the gill membranes, and in other 

 respects ; differing in the presence of teeth 011 vomer and palatines ; anal 

 tin very long, of 11 rays; lower rays of pectoral exserted. North Pacific. 

 (AvcrrunciiSj an averting demon, from the armed head.) 



a. Snout rather long, the rostral spines protruding. EMMELANE, 2417. 



aa. Snout shorter, the rostral spines scarcely protruding. STERLETUS, 2418. 



2417. AVERRUXCUS EMMELANE, Jordan & Starks. 



Head from tips of rostral spines, 4 in length of body ; depth 7. D. VIII 

 or IX, 8; A. 11; P. 14; lateral line 35; orbit 4 in head; snout, to tips of 

 rostral spines, 3; maxillary 3|; interorbital 6; pectoral If; second dor- 

 sal spine 2f ; third dorsal ray 2; longest anal ray 2; caudal fin 2. Body 

 elongate, subcylindrical, the caudal peduncle long and slender, very 

 slightly depressed, about 3 plates in front of caudal fin it widens slightly 



