FISHES OF THE FAMILY LOBICAKIID.E. 247 



base of dorsal a little less than its distance from the adipose fin, which is preceded by a 

 keel formed by 3 scutes. A. I 4. Pectoral spine not reaching base of ventral. Caudal 

 peduncle 3^ times as long as deep. Olivaceous, all the fins except the anal with small 

 dark spots on the rays. 



Total length 100 mm. 



One specimen from the Marcapata Valley, E. Peru, collected by Mr. Ockenden. 



4. Ciletostomus brevis, sp. n. (Plate XIII. fig. 3.) 



Depth of body about 4-j times in the total length, length of head about 3^- times. 

 Head as broad as, or a little broader than long and about If times as long as deep. 

 Diameter of eye 7-10 times in the length of head, interorbital width 3 times, length of 

 snout lf-If times. Length of mandibular ramus little greater than the interorbital 

 width. Interoperculum with 5-8 short spines. 24 scutes in a longitudinal series, 6-7 

 between dorsal and adipose fin, 10-12 between anal and caudal. D. I 8, the first ray 

 equal to f the length of head, the last -§— f as long ; length of base of dorsal equal to its 

 distance from middle or posterior half of spine of adipose fin. A. I 4. Pectoral spine 

 extending to base or anterior \ of ventral. Caudal slightly and obliquely emarginate. 

 Caudal peduncle twice as long as deep. Olivaceous; sometimes a network of dark 

 lines on the head ; membrane of dorsal usually blackish, sometimes with a row of light 

 spots in front of each ray. 



Total length 200 mm. 



Six specimens from the Bomboiza and Zamora Rivers, Eastern Ecuador, collected by 

 Dr. H. Festa, had been referred by Boulenger to C. microps in his account of the Festa 

 Collection. 



5. fClMTOSTOMUS TACZANOWSKII. 



Chcetostomus taczanowskii Steintl. Denksclir. Ak. Wien, xlvi. 1882, p. 23, pi. v. fig. 2. 



Depth of body 5-5f times in the total length, length of head 3 times. Head as 

 broad as long and lf-2 times as long as deep. Diameter of eye 9-1 0£ times in the 

 length of head, interorbital width 3-3^ times, length of snout If times. Inter- 

 operculum with 8-10 spines. 26 scutes in a longitudinal series, 6-7 between dorsal 

 and adipose fin, 9-11 between anal and caudal. D. I 8, the first ray equal to f-f the 

 length of head, the last -f as long; length of base of dorsal equal to its distance from 

 the last \ of the spine of the adipose fin. A. 1 4. Pectoral spine extending to anterior 

 \ of ventral. Caudal slightly and obliquely emarginate. Caudal peduncle 2^ times as 

 long as deep. Olivaceous ; the young with dark spots on the caudal. 



The typical examples from the Bio Huambo and the Bio de Tortora, Peru, measure 

 up to 170 mm. in total length. 



vol. xvii. — part.iii. No. 8.— October, 1904. 2l 



