PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 253 
DIAGNOSIS OF NEW GENERA AND SPECIES OF DEEP-SEA FISH- 
LIKE VERTEBRATES. 
By THEODORE GILL. 
The explorations of the United States Fish Commission steamer 
Albatross, under the command of Capt. Z. L. Tanner, were unusually 
successful during the past summer, in the discovery of hitherto unknown 
species and higher types of fishes, as well as other animals. At the 
invitation of the Commissioner, Professor Baird, I have examined the 
collection made during the several trips of the year, and have found no 
less than eighteen new species of fish-like vertebrates—one Myzont, one 
Selachian, and sixteen true Fishes. Diagnoses of most of these are here 
- given, but those of four others—one Eurypharyngoid and three Nemich- 
thyoid fishes—will be immediately published in other articles by the 
present author in conjunction with Mr. John A. Ryder, whose skill as 
an anatomist, as well as an artist, has rendered his aid invaluable. 
Hereafter, more full descriptions and illustrations will be given of the 
forms now diagnosed. 
CLASS OF MYZONTS. 
PETROMYZONTIDZ. 
Petromyzon (Bathymyzon) Bairdii. 
CLASS OF SELACHIANS. 
CHIMZRIDZ. 
Chimera abbreviata. 
CLASS OF FISHES. 
EURYPHARYNGIDZ. 
Gastrostomus Bairdii. 
NEMICHTHYID&. 
Serrivomer Beanii. 
Spinivomer Goodei. 
Labichthys carinatus. 
Labichthys elongatus. 
SYNAPHOBRANCHIDZ. 
Histiobranchus infernalis. 
NOTACANTHIDZ. 
Notacanthus analis. 
CHAULIODONTIDZ. 
Sigmops stigmaticus. 
STOMIATID &. 
Hyperchoristus Tanneri. 
