186 
ZOOLOGICAL LITERATURE. 
Prof. Peters considers the question settled, that the Leptocephali are not the 
larvae of Cepola or of other Band-fishes.” 
Plectognathi. 
Mola, Prof. Steenstrup and Dr. Liitken have critically ex- 
amined the species of this genus and their history, on the 
occasion of a gigantic specimen of Mola nasus (Rafin.) being 
thrown on shore near Sevede in Denmark. They admit only 
two other well-determined species, viz. Mola retzii (Ranz.) and 
Ranzania truncata (Retz.). Young specimens differ from the 
old ones in form, physiognomy, and surface of the integuments, 
which circumstance has induced Swainson, Dekay, and Gill to 
form distinct genera and even families for them (Molacanthus ^ 
Acanthosomaj Molacanthidce) . Qilfvers. Dansk. Vidensk. Selsk. 
Forhandl. in 1863, p. 36. 
\i jPsilonotus amhoinemis, sp. n., Bleeker, Tydschr. Nederl. Ind. 1864, p. 180, 
from Amhoyna. 
Lopiiobranchii, 
Hr. Malmgren mentions Syngnathus typhle and Nerophis ophidion as oc- 
curring on the Finnish coasts. Wiegm. Arch. 1864, p. 343. 
Ganoidei. 
Lepidosteus. Prof. Winchell enumerates 15 species of this genus, one of 
>1 which is described as new — Cylindrosteus oculatus from Michigan. Proc. 
Acad, Nat. Sc. Philad. 1864, p. 183. 
Squalid.®, 
M. du Bocage, Proc, Zool. Soc. 1864, June 14, enumerates 
the sharks of Dr. Gray^s group Acanthianaj which are found on 
the coast of Portugal, and describes the following new species 
and genera : — 
Centrophorus lusitanicus, p. 260, fig, 1 j C. crepidalhuSj p. 261, fig. 2 j C. 
crepidater, p. 261, fig. 3. 
>i CentroscymnuSf g. n., p. 263 ; Teeth of the upper jaw very similar to those 
of Seynmus j those of the lower jaw as in Centrophorm. Dorsal fins narrow, 
short, with inconspicuous spines. C. ccelokpis, sp. n., fig. 4. 
^ Scymnodon, g. n., p. 263 : Teeth of the upper jaw as in Scymnus j lower 
jaw with a single median tooth, the teeth adjoining it erect, and those to- 
wards the angle of the mouth gradually decumbent. Dorsal fins narrow, 
short, with minute spines. S. ringenSj sp. n., fig. 6. 
^ Crossorhinus tejitaculatus, sp. n., Peters, Monatsber. Acad. Wiss. Berl. 1864, 
p. 123, from Adelaide. 
Carcharias rnenisorrah (Miill. & Henle) is the t}q>e of a distinct genus, ac- 
cording to Mr. Gill, Proc. Acad. Nat. Sc? Philad. 1864, p. 264. He names 
it Platypodon, and refers to it Squalus tihuro (Poey), S, acronotus (Poey), 
and >S. obscurus (Les.). 
