LYCODAPODIDAE in 



anterior part or middle of eye; teeth small, curved, in broad bands in both jaws, the 

 bands tapering posteriorly ; teeth of the outer row a little larger and set nearly hori- 

 zontally ; many of the teeth visible when the mouth is closed ; a transverse series of 

 3 to 6 similar teeth on the vomer and a row of 10 to 15 on each palatine. Gill-opening 

 extending well above base of pectoral; no pseudobranchiae ; gill-rakers longer than 

 broad, 10 on lower part of anterior arch; gill-membranes united anteriorly and free 

 from the isthmus. Dorsal 82-85 5 ori g in above midd,e of pectoral. Anal about 75 ; 

 distance from head to origin of fin about equal to length of head. Pectoral 2f to 3 in 

 length of head. Skin loose ; mucous pores on head rather inconspicuous ; an irregular 



Fig. 59. Lycodapus aus traits. Holotype. x ij. 



double row of mucous pores along anterior part of side, rising anteriorly above the 

 pectoral fin, becoming single and eventually disappearing posteriorly. Uniformly 

 brownish; head paler; fins yellowish-brown. 



Hub. Straits of Magellan. 



All the previously known species of this genus are from the Pacific coast of North 

 America, ranging from the Bering Sea to Lower California. In the conspicuous mucous 

 pores on the body this species resembles L. dermatimis, Gilbert, but differs in the 

 dentition, greater number of dorsal and anal rays, smaller head, rather more slender 

 body, etc. A related genus, Snyderidea, Gilbert, with canine-like teeth in the jaws and 

 on the vomer and palatines, has been described from the Hawaiian Islands. 



OPHIDIIDAE 



Genus Genypterus, Philippi 

 1857, Arch. Naturgesch., xxin (1), p. 268. Type G. nigricans, Philippi. 



Key to the South American species 



I. Depth of body 65 to 9J, head 4J to 5 in length of fish; interorbital width 6i to 8.V in length 

 of head. 



A. Depth of body 7$ to 9! in length of fish; eye 5 to 7 (very large specimens) in length 

 of head; coloration yellowish, the back and upper parts of sides marbled with 

 brown blacodes. 



B. Depth of body 6f to 7! in length of fish; eye 7 to 7! in length of head; back and 

 upper parts of sides blackish, with some rather small and irregularly arranged white 

 spots ••• chilensis. 



II. Depth of body 6 to b\, head about 4 in length of fish; interorbital width about sh in length 

 of head ; whole body chocolate brown or blackish, covered with large white hieroglyphic- 

 like markings •• maculatus. 



