PISCES. 197 
^ Vhysiculus kaupt, sp. n., Poey, Repert. Fisico-nat. Cub. 1865, p. 186, from 
Cuba. D. 10 I 60. A. 60. V. 8. 
JBreymaceros maccIeUandii haa received a third name by Lieut.-Col. Tickell, 
viz. Asthenurus atripinnis. Journ. As. Soc. Beng. 1865, p. 32, pi. 1. 
Lucifuga. Prof. Poey treats of the Blind Fishes of C»jJba generally, and 
mentions that Mr. Gill has proposed the generic name or Stygicola for the 
species of Lucifuga without palatine teeth. Repert. Fisico-nat. Cub. 1865, 
pp. 113-116. 
In the Record,^ last year (p. 161), we gave the results of 
Prof. Steenstrup^’s researches on the obliquity of Flounders, 
The greater part of this memoir has been translated by Prof. 
W. Thomson, who, however, comes to a different conclusion as 
regards the way taken by the eye on its migration from one 
side to the other. T^ie eye, he says, passes not through the 
vault of the head but under its integument, displacing in its 
progress the frontal bone of its own side — the space through 
which its nervous and vascular connexions passed being indi- 
cated in the mature skull by the unsymmetrical posterior half of 
the articulating process of the right prefrontal, the eye having 
maintained its normal relation to its associated bone through- 
out. The eye changes little in actual position. With the growth 
of the fish the associated parts are, as it were, developed past it, 
Ann. & Mag. Nat. Hist. 1865, xv, pp. 361-371, with a plate 
(figures taken from the original memoir). 
Dr. R. H. Traquair has published his researches into the 
osteology of the common British species of Pleuronectoids in 
Trans. Linn. Soc. xxv. 1865, pp. 263-296 (with four plates) . He 
describes in detail the bones of the skull, comparing each bone 
of the eye side with its fellow on the blind side. He adopts the 
opinion that the interocular bar is the homologue of the fron- 
tal arch of other fishes ; the osseous ridge above the upper eye, 
which he calls pseudomesiaP^ bar, he regards as a secondary 
formation destined to supply the place of the displaced frontal 
arch, in forming a strong and efficient bridge of connexion be- 
tween the anterior and posterior parts of the cranium, and also 
to support the cephalic continuation of the dorsal fin.^^ The 
interocular bar is formed by tw'o closely apposed processes, one 
from each frontal ; in the Plaice and Flounder, however, it is 
formed for the greater part of its extent by the process from the 
frontal of the eye side only, that of the other frontal being re- 
duced to a very small size. The osseous bar bounding the orbit 
on the inner side is formed by a process developed from the 
rental of the blind side, which proceeds forwards to join a cor- 
responding process of the praefrontal of the same side. The prae- 
frontal of the eye side has an interocular process wffiich joins the 
corresponding long process of the frontal of the same side. This 
process is entirely absent in the prsefrontal of the blind side. 
