MYXINE AUSTRALIS. 345 
body, pectoral twenty-four, abdominal fifty-nine, caudal eighteen. Abdom- 
inal keel prominent in front of the vent. 
Largest specimen eighteen and five eighths inches in length. 
Body uniform black ; head lighter anteriorly. 
Station. Latitude. Longitude. Depth. Temperature, Bottom. 
3395 1230, 360 IN 78° 39’ W. 730 fathoms 38.5° F. Rocky. 
Myxine tridentiger nom. sp. n. 
Myzxine australis Giint., 1870, Cat., VIII, 511, — 1887, “Challenger” Fishes, 267. 
“Ten or eleven slender teeth in each of the two series, the three fore- 
most are strongest and confluent at the base, the other teeth remaining 
separate ; in the second series the two innermost teeth are confluent at the 
base. Southern coasts of South America. Sandy Point. Tyssen Islands.” 
According to Giinther this species ‘ occurs also in the Japanese Sea, 
half a dozen specimens from nine to twenty inches long having been taken 
on the Hyalonema ground at a depth of 345 fathoms (Station 232). I also 
believe that Heptatrema cirrhatum of Schlegel, should be referred to the same 
species. The three foremost teeth of the inner series are invariably con- 
fluent at the base, but in adult specimens they are neither longer nor 
stouter than the next succeeding. The branchial apertures are subject to 
some variation, a specimen from Magellan Strait having two on the left 
side and one on the right.” 
In the earlier of the works cited Schlegel’s species was referred to 
Bdellostoma (= Homea). The results of comparisons of representatives 
of the genus from other parts of the world are such as to raise doubts 
concerning the specific identity of the Japanese species with either of the 
species of Myxine from other regions. 
Myxine australis. 
Myxine australis Jenyns, 1842, Voy. “ Beagle,” Fish, 159. 
Myxine affinis Giint., 1870, Cat., VIII, 511. 
Myzxine glutinosa var. australis Put., 1874, Pr. B. N. H. Soe., 135. 
Myxine olivacea Jord, & Everm., 1896, Bull. 47 U. S. Mus., 7. 
Plate LX VII. fig. 8. 
In the collections of the Museum of Comparative Zoology there are two 
lots of specimens, obtained by the Hassler Expedition, belonging to this 
species. One lot was taken at Port Famine, where this was the only species 
