2568 Bulletin 4.7, United States National Museum. 



2942. STEINDACHNERIA ARGESTEA, Goode & Beau. 



Head 5| in total ; depth 7-J-, at anal origin 8 ; eye 3 in head ; snout about 

 5i; interorbital width 51 ; maxillary 2; premaxillary 2 ; mandible If; gill 

 rakers 4 or 5 + 19; D. VIII, 123 + ; A. 10 + 113; P. 15; V. 8. Head and 

 body compressed; tail tapering to a very fine point. Scales small, decid- 

 uous, cycloid, 6 rows between lateral line and origin of soft dorsal. Nos- 

 trils nearer eye than end of snout, the anterior nostril nearly circular, the 

 posterior much longer and slightly concave ; no barbel. Maxillary dilated 

 at the extremity and somewhat produced downward into an obtuse point, 

 reaching nearly to a vertical at posterior margin of orbit, and concealed 

 by the preorbital ; premaxillaries slightly protractile, much attenuated 

 posteriorly; mandible reaching slightly behind eye. Premaxillary and 

 mandibular teeth biserial, those of the outer series enlarged and rather 

 widely set, some of the enlarged teeth slightly sagittate at tip ; vomerine 

 teeth well developed; upper pharyngeal teeth in 2 broad, well-developed 

 patches. Gill rakers slender, the longest about 2 in eye. Distance from 

 snout to first dorsal about i total length, the first spine elongate, filiform, 

 and reaching fourteenth ray of second dorsal ; base of first dorsal about 1 

 in head; longest ray of second dorsal about 2-J- in head, the rays diminish- 

 ing in size rapidly, the last minute; origin of anal under sixth ray of 

 second dorsal, not far behind the vent, the anterior elevated portion con- 

 sisting of 10 rays, all of which except the first are divided, the second ray 

 longest, twice length of eye, the tenth ray only about | length of second, 

 and separated by a small membrane from rest of fin which consists of very 

 minute rays. Vent under fourth ray of second dorsal. Origin of ventrals 

 under base of pectorals and about under third spine of first dorsal; first 

 ventral ray filamentous, reaching origin of anal ; pectoral reaching to below 

 fifteenth ray of second dorsal. Gulf of Mexico. Only the type known. 

 Length 233 mm. (argenteus, silvery.) 



Steindachneria argentea, GOODE & BEAN, Oceanic Ichthyology, 419, fig. 351,1896, off delta 

 of Mississispi River, Lat. 39 14' 30" N., Long. 88og' 30" W., in 68 fathoms. (Type, 

 No. 37350. Coll. Albatross.) 



997. TRACHYRINCUS, Giorna. 



Trachyrincus, GIORNA, Mem. Accad. Imp. Turin, xvi, 1803, 178 (no type mentioned). 

 Lepidoleprus, Risso, Ichth. Nice, 197, 1810 (trachyrincus) . 

 Oxycephas, RAFLNESQUE, Caratteri, 31, 1810 (scabrus trachyrincus). 

 Lepidosoma, SWAINSON, Nat. Hist. Class'n Fish., n, 261, 1839 (t.rachyrhyncJni-s). 

 Trachyrhynchus, GUNTHER, Challenger Report, xxn, 152, 1887 ; corrected spelling. 



Snout produced in a long depressed process which is sharply pointed in 

 front, with a sharp lateral edge, which is continued in a straight line 

 .-icross the suborbital region. Mouth ^inferior, horseshoe-shaped, placed 

 like the mouth of a sturgeon. Teeth in both jaws in villiform bands; 

 chin with a barbel; a scaleless fossa on each side of nape. Second dorsal 

 well developed. Scales moderate, spinigerous ; a series of larger scales, 

 each armed with a projecting ridge, along each side of base of dorsal and 

 :inal anteriorly. Opercle small. Gill membranes scarcely united; gills 4; 

 first gill arch free, with short, styliform gill rakers. Deep seas. This 



