392 SILUEID^. 



14. ANDERSONIA. 



Boulenger, Ann. & Mag. K H. (7) vi. 1900, p. 528. 

 Slatinia, Werner, Anz. Ak. 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 them. 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. 



Most nearly allied to JPhractura, Blgr., from which it is well distinguished by the 

 position of the anterior dorsal fin, the presence of a spine in front of each of the dorsal 

 fins, and the total absence of teeth. 



This genus, named in memory of Dr. John Anderson, is represented by a 

 single species. 



1. ANDERSONIA LEPTURA. 

 (Plate LXXVI. fig. 4.) 



Boulenger, t. c. p. 529. 



Slatinia mongallensis, Werner, t. c. p. 327. 



Depth of body nine or ten times in the total length, length of head five to five and 

 three-fourths times. Head once and one-third as long as broad, rugose above; an 

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

 of the occipital process ; snout obtusely pointed, a little shorter than the postocular 

 part of the head, tw r ice and one-third as long as the diameter of the eye, which is half 

 the interorbital width. Barbels slender, the maxillary twice as long as the inner 

 mandibular and half the length of the head, the outer mandibular intermediate in 

 length. Occipital process keeled, twice and a half as long as broad, widely separated 

 from the interneural shield ; a shorter process on each side of the occipital process. 



* I regret having overlooked the inner mandibular barbel in drawing up my original definition of the 

 genus, as it has led Dr. "Werner to propose the genus Slatinia, which cannot be maintained. 



