FISHES OF THE FAMILY LOEICAEIID^. 299 



keels very weak and obtuse, the scutes otherwise not carinate. Lower surface of head 

 naked except for a granular plate in front of each gill-cleft ; abdomen covered with 

 numerous small granular plates, arranged in 8-10 irregular series between the lateral 

 series ; posterior plates somewhat larger and fewer ; a pair of rather large anal plates. 

 First dorsal ray nearly twice as long as the head ; pectoral spine extending beyond 

 middle of ventral ; caudal deeply emarginate. Brownish ; some dark spots on the 

 dorsal and caudal. 



Total length 185 mm. 



Two specimens : Surinam. 



3. f OXYLORICAKIA BREVIROSTRIS. 



Loricaria brevirostris Eigenm. & Eigenm. Proc. Cal. Ac. (2) ii. 1889, p. 35. 



Diameter of eye 7 times in the length of head, interorbital width o\ times, length 

 of snout nearly twice. Snout pointed ; supraorbital edges slightly raised ; sides of 

 the head, in the male, with short bristles. 34 scutes in a longitudinal series, 19 + T5 ; 

 lateral keels weak, completely united posteriorly ; scutes otherwise not carinate. 

 Lower surface of the head covered with numerous small irregular plates ; abdomen 

 with 3 series of plates between the lateral series. ' First dorsal ray longer than the 

 head. Dorsal and caudal with dark spots on the rays. 



The type, from lea, Peru, measures 210 mm. to the base of caudal. 



4. OXTLORICARIA GUENTHERI, sp. n. (Plate XVIII. fig. 1.) 



Loricaria rostrata (non Spix) Giinth. Proc. Zool. Soc. 1868, p. 235 ; Eigenm. & Eigenm. Proc. 

 Cal. Ac. (2) ii. 1889, p. 35, and Occ. Pap. Cal. Ac. i. 1890, p. 366. 



Length of head 4-f times in the total length. Breadth of head If times in its 

 length, diameter of eye 7f times, interorbital width of- times, length of snout li times. 

 Snout with a projecting rostrum ; supraorbital edges not raised ; sides of the head, in 

 the male, with bristles of moderate length. 36 scutes in a longitudinal series, 20+16 ; 

 lateral keels weak, obsolete anteriorly, completely united posteriorly ; lower surface of 

 head wdth small plates, except an area which is covered by the lower lip ; abdomen 

 with 3 series of plates between the lateral series ; an anal plate, bordered anteriorly 

 by 3, these 3 again by 5. Length of first dorsal ray b\ times in the total length. 

 Pectoral spine extending slightly beyond the base of ventrals. Caudal emarginate, 

 the outer rays produced. Breadth of body at level of last anal ray 4f times in the 

 distance from the latter to the caudal. Uniformly olivaceous. 



Total length 230 mm. 



One specimen from Xeberos, Upper Amazon. This species has also been recorded 

 from Manacapuru, Middle Amazon. 



