222 Dte. A. GtTNTItBE ON A COiitEOTlbN OF [f'eb. 4, 



the width of the iuterorbital space. The gill-opening extends 

 downward to before the root of the pectoral fin. Mandibular/ 

 teeth in a very narrow and short row, less than 20 in number, 

 shorter than the eye. The maxillary barbels do not reach the end 

 of the humeral spine and are simple ; mandibular/ barbels reaching 

 to the root of tlie pectorals, sparsely provided with fringes. 

 Nuchal carapace tectiform, compressed into a median ridge, rather 

 pointed behind, its end reaching to below the first soft dorsal ray. 

 Humeral spine reaching equally far backward, much longer than 

 high, with its upper margin oblique and nearly straight, termi- 

 nating in a sharp point. Skin of the side of the body villous. 



Adipose fin moderately long, the interspace between it and the 

 dorsal being less than the base of the latter. Dorsal spine short, 

 with a sharp anterior edge wiiich shows scarcely a trace of serra- 

 ture about the middle of its length, and is probably quite smooth 

 in older e.\amples ; this spine is shorter than the pectoral spine, 

 which is serrated along both edges and shorter than the distance 

 of the foremost part of the soft part of the trunk from the snout. 

 Coloration uniform. 



A single specimen, 21 cm. long, was obtained in Lake Stephanie 

 on June 11, 1895. 



9. Stnodontis smithii, sp. n. (Plate IX.) 

 D. 1/7. A. 13. P. 1/9. 



Bather stout in general habit ; snout comparatively broad, not 

 much attenuated in front; diameter of the orbit one half of the 

 length of the snout, and of the width of the interorbital space. 

 The gill-opening extends downward to before the root of the pec- 

 toral fin. Mandibuhiry teeth in a narrow, short series, about 25 

 in number, shorter than the eye. The maxillary barbels do not 

 reach the end of the humeral spine and are simple ; mandibulary 

 barbels reaching to the root of the pectorals, provided with long 

 fringes. Nuchal carapace tectiform, compressed into a median 

 ridge, rather pointed behind, its end reaching to below the first 

 soft dorsal ray. Humeral spine reaching equally far, or even a 

 little farther backward, much longer than high,'vidth its upper 

 margin oblique, but straight, terminating in a sharp point. Skin 

 of the side of the body villous, particularly along the lateral 

 line. 



Adipose fin moderately long, the interspace between it and the 

 dorsal being less than the base of the latter. Dorsal spine with a 

 sharp, non-serrated anterior edge, equal in length to the pectoral 

 spine, which is strongly serrated along both edges, the inner serra- 

 ture being coarser than the outer. The length of these spines 

 exceeds somewhat the distance of the foremost part of the soft 

 part of the trunk from the snout. Coloration uniform. 



A single specimen, 24 cm. long, was obtained. 



This species is allied to (S. sc?ial, but distinguished by its 

 enormously long spines. 



