BULLETIN OF THE UNITED STATES FISH COMMISSION. 
426 
This description is based on 2 specimens taken from the coral reef at Honolulu, the type, 6.13 
inches in length, and a cotype. These do not differ from each other in coloration. 
Type, No. 50681, U. S. N. M. 
14. Gymnothorax gracilicauda Jenkins, new species. 
Head 9 in total length; depth 2.5 in head; tip of snout to vent 1.33 in distance from vent to tip of 
tail; tip of snout to angle of mouth 2.33 in head; eye 1.33 in snout; gill-opening very small, less than 
one-half diameter of eye, with no color marking; dorsal fin low, its origin in advance of gill-opening; 
body very slender and compressed; tail long and very gradually tapering to a point; teeth all long 
and sharp-pointed, in a single series in lower jaw, in a double series in the upper, the inner series on 
each side consisting of 4 longer, sharp teeth, the teeth on anterior part of each jaw and on vomer the 
longest; 2 teeth on the vomer; anterior nostril tubular, near tip of snout and just above margin of lip, 
posterior smooth and very near upper anterior margin of eye. 
Color in alcohol, general color, very pale, nearly white, marked by very irregularly-formed light 
brown spots, arranged in about 40 ill-defined transverse bands, these lacking on ventral aspect before 
the vent, leaving the belly white; a very small hrown spot at angle of the mouth. 
The only known specimen is the type, No. 50679, U. S. N. M. (original No. 367), 8.5 inches long, 
obtained by me from coral rocks on the reef in front of Honolulu. 
Fig. C . — Gymnothorax gracilicauda Jenkins, new specie^. Typ 
15. Gymnothorax undulatus (Lacepede). 
This species seems to be the most common eel at Honolulu. It varies much in color and reaches 
a length of 3 feet or more. It is used as food by the natives. 
Color in life (No. 132), general color drab, with many reticulations of nearly white; a yellow 
area on top of head, and from snout to a considerable distance behind the eyes yellow. In another 
specimen (No. 232) the dark ground-work was reddish-brown. 
Numerous specimens, ranging from 10 to 28 inches, were taken by me at Honolulu. 
Mursenophis undulata Lacepede, Hist. Nat. Poiss., v, 629, 644, 1803, South Seas. 
Mursena undulata Gunther, Cat., vm, 110, 1870 (Zanzibar, Cocos, East Indies, Hawaiian Islands); Streets, Bull. U. S. Nat. 
Mus., No. 7, 77, 1877 (Honolulu). 
Thyrsoidea kaiipii Abbott, Proc. Ac. Nat. Sci. Phila. 1860, 477, Hawaiian Islands. 
Lycodontis kaupii Fowler, Proc. Ac. Nat. Sci. Phila. 1900, 494, pi. xvm, fig. 6 (Abbott’s type). 
Lycodontis pseudothyrsoidea Fowler, Proc. Ac. Nat. Sci. Phila. 1900, 494 (Hawaiian Islands); not of Bleeker. 
16. Gymnothorax steindachneri Jordan & Evermann. 
One specimen of this eel was obtained by the Albatross in 1896. 
Gymnothorax steindachneri Jordan & Evermann, Bull. U. S. Fish Comm, for 1902 (April 11, 1903), 166, Honolulu. (Typf 
No. 50616, U. S. N. M., coll. Jordan & Evermann.) 
Mursena Jlavomarginata var., Steindachner, Denks. Ak. Wiss. Wien, lxx, 1900, 32, pi. vi, fig. 3 (Laysan); not of Riippell. 
