50 BULLETIN 18 0, UNITED STATES NATIONAL MUSEUM 



enlarged centi*ally located tooth. The following proportional 

 measurements were computed : Depth 24 to 37 ; head 8.5 to 10.3 ; 

 distance from tip of snout to anus 2.26 to 2.48 ; snout to origin 

 of dorsal 2.2 to 2.49; length of tail 1.68 to 1.79, all in total length. 

 Depth 2.83 to 3.9; mouth 3.32 to 3.9, all in head. Snout 1.34 to 

 1.6 in mouth. Eye 2.0 to 2.7 in snout. Head 3.6 to 4.3 in distance 

 from snout to origin of dorsal. Head 3.72 to 4.14 in snout to 

 anus. (Fig. 5, c.) Muraenichthys laticaudata (Ogilby) 



ICAUPICHTHYS, new genus 



This new genus differs from all other echelid genera in the denti- 

 tion; the vomer has two rows of teeth that begin behind the inter- 

 maxillary plate, then diverge widely, and finally meet again 

 posteriorly; also the dentary has three pairs of canine teeth near 

 the midline at the front of the jaw, and along the sides of the lower 

 jaw two or three irregular rows anteriorly becoming uniserial pos- 

 teriorly. The anus is farther forward than on other echelid eels, 

 since it is only one head length behind the gill openings. A diagram 

 of the teeth is shown in figure 5, i. 



Other characters of the genus are those of the species. 



Genotype. — Kawpichthys diodontus^ new species. 



Named in recognition of the work done on the apodal fishes by 

 Johann Jacob Kaup (1803-1873). 



KAUPICHTHYS DIODONTUS, new species 

 Plate 6 ; Figxjp.e 5, i 



Ilolotype. — A specimen 138 mm. in total length (U. S. N. M. No. 

 115980), collected by Leonard P. Schultz on the reef of Tau Island at 

 Siulagi Point, June 27, 1939. A paratype 92 mm. long (U. S. N. M. 

 No. 115981) was collected by L. P. Schultz on the reef of Rose 

 Island, June 11-14, 1939. 



Description. — (Based on the holotype and one paratype, only known 

 specimen. All measurements are given in millimeters, and from 

 these various proportions were computed and recorded in the key, 

 pages 48, 49. Measurements are given for the holotype followed by 

 those for the paratype in parentheses.) Total length 138 (92) ; 

 length of head 18.4 (12.3) ; greatest depth of body 7.3 (3,3) ; distance 

 from tip of snout to anus 36.2 (24.2) ; snout to origin of dorsal 19.6 

 (12.1) ; length of tail 101.8 (67.8) ; diameter of eye 1.8 (1.1) ; length 

 of snout 4.5 (3.0) ; tip of snout to rictus 6.7 (4.7) ; width of fleshy 

 interorbital space 2.7 (1.7) ; length of longest caudal fin ray 2.3 (1.7) ; 

 width of lower jaw below eyes 2.1 (1.4) ; width of head at eyes 4.5 

 (2.3) ; length of pectoral fin 2.7 (l.G). 



Pectoral rays 14 on right side of the type. 



The anterior nostrils are tubular and occur on the side of the snout 

 near its tip; the posterior nostrils lie in the upper lip under the front 



