276 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
it, niider tlie name of PlagyoduH^ left by him in manuscript, was after- 
ymrds (pioted by Pallas, without indorsement. Steller wrote before 
Linnieus, and apparently used the name PJagyodus as a mononomial 
desi{ 4 nation for his particular specimen or species, and not in the sense 
of a Linnaian genus. It seems to us, at present, best to retain the name 
Aleindosaurus. (a, privative 5 scale 5 Saurus=: Synodus.) 
* Ventral rays 9 or 10. {Alcpidosaurus.) 
45§. A. fea’OX Lowo. — Lancet-fish. 
The length of the head is twice the height of the body, and rather less 
than one-sixth of the total. Eye median, 0 in head, as wide as the 
interorbital space. Dorsal fin much elevated; pectorals elongated, but 
not reaching nearly to ventrals; first ray of dorsal, pectoral, and ventral 
serrated. Upper caudal lobe produced into a long filament. D. 41-44; 
A. 14-17 ; P. 14-15; Y. 9-10. {Giinther.) Deep waters of the Atlantic; 
lately obtained ofl:' the coast of Massachusetts by the United States 
Fish Commission. A specimen of this or some closely-related species 
has been procured by Dr. Bean in Alaska. 
(Alejnsattras ferox Lowe, Trans. Zocil. Soc. Lond. i, 395; Giinther, v, 421.) 
**Ventral rays 13. {Caulopus Gill.*) 
451>. A. toofi’calis Gill. — Ilandsaw-fi.sh. 
Dorsal fin with about 34 rays, the first of which is rather stout, and 
anteriorly has a prominent compressed ridge, which is crenulated in 
front. Ventral fins at least as long as the head. V. 13; B. 5. Mon- 
terey to Alaska ; occasionally cast on shore. 
(Gill, Proc. Acad. Nat. Sci. Pliila. 1862, 128: Alcpidosaurus horealis Giinther, v, 423: 
Caulopus serra Gill, Proc. Acad. Nat. Sci. Phila. 1862, 131, from Monterey; known hy 
a mutilated specimen only, Avhich “differs Irom C. borealis hy the ohlong opercnlnm, 
the nearly equal triangular shape of the coalesccut infraopercular hone above the 
dividing ridge, but with an obli(pie excavation at its base, which describes nearly 
the third of a circle, as well as the sculpture of the portion below the dividing 
ridge”. ) 
Family XLL— PARALEPIDID^. 
{The Paralcpids.) 
Body elongate, somewhat compressed, formed much as in a Barracuda, 
covered with cycloid scales of moderate or rather large size. Head long, 
usuallj^ scaly on the sides. Mouth very large, lower jaw projecting. 
Premaxillary not iirojectile, very long and slender, forming the entire 
margin of the upper jaw. Maxillary long and slender, closely adherent 
"Gill, Proc. Acad. Nat. Sci. Phila. 1862, 128: type Ahpisaur us aliivelis Poey, from 
Cubg, {xavXo?, stem; Ttovi, foot; i. e., ventral tins of many stems or rays.) 
