510 



SILURID.-E. 



39. ANDERSONIA. 



Bouleng. Ann. & Mag. N. H. (7) vi. 1900, p. 528, and Fish. Nile, p. 392 (1907), 

 Slatinia, Werner, Anz. Akad. Wien, 1906, p. 326. 



Body elongate, depressed, with extremely slender caudal peduncle ; 

 a series of imbricate bony scutes along each side of the back and belly 

 from the dorsal and ventral fins to the caudal peduncle, which is entirely 

 surrounded by bony scutes. Two short dorsal fins, the first above the 

 ventrals and formed of a spine and six branched rays, the second 

 opposed to the anal and formed of fine soft rays preceded by a short 

 spine. Pectoral fin with a strong spine ; ventral fin with 6 rays. No 

 cephalo-nuchal shield. Mouth small, inferior, toothless ; lips not much 

 developed. A maxillary and two mandibular barbels on each side. 

 Nostrils rather remote from each other, both with a valve. Eye small, 

 without free border. Gill-openings narrowly interrupted at the 

 isthmus. 



Nile. 



1. ANDERSONIA LEPTURA. 



Bouleng. t. c. pp. 529, 392, pi. lxxvi. fig. 4 ; Werner, Sitzb. Ak. Wien, cxv. i. 



1906, pi. i. figs. 2-4. 

 Slatinia mongallensu, Werner, Anz. Ak. Wien, 1906, p. 327. 



Depth of body 9 to 10 times in total length, length of head 5 to 5| 



Fig. 3S1. 



Andersonia hqilura. 

 Type (F. N.). 



times. Head 1^ times as long as broad, rugose above ; an oval frontal 

 fontanelle, with a ridge on each side of it, which is continued to base of 



