PHYSOSTOMI. 
Pisces. 35 
caudal fius is against such a conclusion. Peters, MB. Ak. Berl. 1876, , 
pp. 846-848. 
Stomias boa, Risso. A specimen exhibiting no differences from this 
species found in the Pacific Ocean ; id. l.c. p. 846. 
/^xocostus. Liitken (Vid. Medd. 1876, pp. 389-408, pi. x.) has made 
/a particular study of this genus, which, originally consisting of two 
I species, has been increased to the number of fifty, with ten doubtful. 
He finds that several characters not unimportant for the group- • 
ing of the species have been quite overlooked ; one, for instance, drawn 
from the pectoral fin, affords a means of subdividing the greater part 
of the genus, thus : — A. 2nd ray of pectoral entire. B. 2nd ray of pectoral 
deeply cleft. The species which range themselves in these two groups 
are about equal in number. When the 2nd pectoral ray is cleft, the 3rd is 
always the longest ray, pp. 398 & 399. He publishes a preliminary ab- 
stract from a forthcoming monograph of the genus, giving (pp. 392-394) 
* Conspectus sectionum generis Exocoeti,’ but without the names of any 
of the new species which will appear in the complete work. Remarks 
and corrections in respect of known species are added. E. georgianus, 
Val., is wrongly ranged by Gunther in the section with short pectorals, 
and takes its place with E. evolans and obtusirostris, differing, however, in 
the possession of barbels, p. 394. Remarks on the comparative cha- 
racters for distinguishing the two last named species, p. 395. E.^ 
\^comatus, Mitch., figured, pi. x. fig. 1, and E. fuiiatus, Mitch., fig. 2 
(head) ; E/nuttallii, Les., is the young of the latter, p. 400. 
vi^xoccetus exiliens. Remarks on the flight of this fish, from close 
observation ; G. Browne-Goode, Fishes of Bermudas, p. 65. 
Salmon I Dii^. 
c 
( ' 
Stewart, J. On the Introduction and Acclimatization of the Salmon 
[into New Zealand]. Tr. N. Z. Inst. viii. pp. 205-209. . 
V y ' V 
R. Collett finds only three species of Salmo in Norway, viz., S. salar, 
L., S. erlox, L. (moa;, truttK, and /a’no, L.), and 8. alpinus,!,., pp. 155-162. 
To Coregonfs lararetus, L., he refers also the following species 
maroena, Bl., C. widegreki, Malmgr., Q, lapponicus, Gthr., C. grcicilis, Gthr., 
and perhaps C. ma^Ularis and humilis, Gthr. ; his reasons for this are 
given in the article on C. lavaretus, p. 166. Norges Fiske. 
Salmo schiffermuelleri, Bl. The results of L. Fitzinger’s observations 
upon this species, in his “Bericht fiber die an den Seen des Salzkam- 
miergutes, Salzburgs, und Berchtesgadens gepflogenen Nachforschungen 
fiber die Natur des Silberlachses ” (SB. Ak. Wien, Ixxii. pp. 235-240), 
lead inevitably to the conclusion that it is a hybrid, the fact being 
ascertained that reproductive organs exist only in a rudimentary con- 
dition in the young stage, degenerating into adipose tissue in the adult. 
This is also the opinion of the fishermen. With respect to the two 
forms of which it will prove to be the union, although without having 
obtained the certainty which would be afforded by successful artificial 
impregnation, the author is able to make a shrewd guess, viz., that, if 
