tU Mr. C. T. Regan on 



Bubcqual. 40 scales in a longituilinal scries, 5 between 

 dorsal tin ami lateral litie, 3 between lateral line ami raot o£ 

 ventral fin. Dorsal III 8; origin nearly equidistant from 

 tip of snout and base of caudal ; longest ray nearly as lona^ as 

 the head ; free edge of the (in slightly concave. Anal 1 1 F 5. 

 Caudal deeply forked. Pectoral as long as the head, not 

 reaching the ventrals, which originate below the middle of 

 the dorsal and extend to the origin of anal. No well-defined 

 spots or markings. 



A single specimen, 53 mm. in total length, from the lake 

 at Yuiman Fu. 



Silurus Orahami. 



Depth of body G in the length, length of head 5. Breadth 

 of head 1^ in its length, diameter of eye 8, interorbital width 

 3^, length of snout 3.\. Lower jaw projecting; vomerine 

 teeth in separate patclies ; 4 barbels, the maxillary ones 

 reaching the ends of the pectorals, the nhmtal o les ? as long. 

 Dorsal 4, its distance from tip of snout slightly more than ^ 

 its distance from the caudal. Anal 73, continuous with the 

 caudal, which is subtruncate. Pectoral with I 13 rays ; 

 spine with the outer edge weakly denticulated and the inner 

 edge entire, its length 5 that of the fin, which is ? as long as 

 the head and does not reach the ventral. Ventrals 12-raye I, 

 extending to the third or fourth ray of anal. Greyish bro.vn. 



A single specimen, 200 mm. in total length, froiu the 

 Chien Kiuiig Lake, 30 miles S.E. of Yunnan Fu. 



This species is very close to S. mento, Rxn-, from Yunnan 

 Fu Lake, which has shorter barbel^, the inner edge of the 

 pectoral spine serrated, and the ventrals 10-rayed. 



Vr. — Diagnoses of new Gentrah American Freshwater Fishes 

 of the Families Cyprinodontid* and Mugilidai. By C 

 Tate Kegax, B.A. 



1. Rivulus ftabellicauda. 



D. 9. A. 12. Sc. 42. Diameter of eye 4 in the length 

 of head. End of anal below middle of dorsal. Brownish, 

 edges of scales darker ; vertical fins with some small darker 

 spots; a caudal ocellus. 



llah. Costa Rica, Juan Vefias {Underwood). 



Total len«'th 70 mm. 



