Jordan and Evermann. Fishes of North America. 1919 



Banks, off San Diego. Types, 2 specimens, 0.04 and 0.05 m. to base of cau- 

 dal, in 45 fathoms. These specimens were taken from the stomach of Sebas- 

 iodes miniatus and are partly digested. The anal and dorsal fins have all 

 disappeared. The dentition and armature of the head indicate that this 

 species is closely related to Icelinus quadriscriatus, of which it is possibly 

 the young. (Eigenmann.) A very imperfectly known species, not sccu 

 by us, perhaps not belonging to Icelus, but apparently nearest that genus. 

 (australis, southern.) 



Icelus australis, EIGENMANN & EIGENMANN, West Amer. Sci. 1889, 131, Cortez Banks, 

 California. (Coll. C. H. Eigeumanu.) 



718. RADULINUS, Gilbert, 

 Ifnd-iiUmis, GILBERT, Proc. U. S. Nat. Mus. 1890, 88 (axprettus). 



Body very slender. Opercular spines 2. Spinous dorsal short, the soft 

 dorsal and anal very long. Gill membranes broadly united, posteriorly 

 free from isthmus. No slit behind last gill. Broad bands of cardiform 

 teeth on jaws, a single series on vomer ; no teeth on palatines. Preoperclo 

 with 2 short, simple spines. Ventrals I, 3. Sides armed with a series of 

 large, keeled, spinous plates along lateral line; similar plates on head; 

 no smaller scales. Pacific coast, (radula, a scraper.) 



a. Eye small, 3? in Lead; interorbital space naked. BOLEOIDES, 2297. 



era. Eye larger, about 2$ in bead; interorbital space armed witli spinous plates. 



ASPRELLUS, 2298. 



2297. RADULIXUS BOLEOIDES, Gilbert, new species. 



Head 4 in length ; depth 9 ; eye 3f in head (2f in R. asprdlm of the same 

 size); snout 3|; maxillary 2f. D. XI, 22; A. 23; pectoral 18; ventrals 

 I, 3; 42 plates in the dorsal series. Head and body very elongate, de- 

 pressed anteriorly, the occiput wider and flatter than in R. asprellus; 

 snout long, depressed and tapering, much as in the Darters ; interorbital 

 space very narrow, about i diameter of pupil; mouth horizontal, at lower 

 side of snout, the maxillary reaching a vertical which traverses eye mid- 

 way between its front and front of pupil. Fine teeth in bands in jaws 

 and on vonier, none on palatines. In R. asprellus, also, the voinerine teeth 

 are in a band, not in a single series as stated in the original description. 

 Branchiostegal membranes broadly united, wholly free from the isthmus 

 in the type. In R. asprcllus the gill membranes vary in this respect, being 

 sometimes wholly free from the isthmus, sometimes attached for \ or 

 more than \ their width. Preopercle with 2 short simple spines, the 

 upper slender and sharp, directed backward and slightly upward, the 

 lower broader and shorter, directed backward and downward; below and 

 in front of these are 2 rounded prominences which bear no spines ; opercle 

 ending in a triangular process which is scarcely spine-like ; nasal spines 

 rather small, a depression between and behind them; no spines on orbital 

 rim, which is not at all raised; the narrow interorbital space not grooved; 

 occiput broad and flat without ridges or spines; a slender filament on 

 upper posterior border or orbit and a similar filament on each side of occi- 



