113 
COTJCniA. 
■When a notice of the most common species of the fishes comprised 
in this genua was published in the fifth volume of Loudon s ‘Magazine 
of hiatural History,” the name assigned to it was Cihata, ^ being 
expressive of the membranous organ bordered with slender threads in 
front of the dorsal fin, which is common to tins new genus, with that 
of Motdla; but ns this name is found to have been already appropriated 
to a different object, it pleased Mr. Thompson, of Belfast, to substitute 
for it the term Coitchia, which has received an establishment by* being 
adopted by Dr. Gunther in his “Catalogue of the Fishes of the British 
The definition of this genus is, — The body compressed, moderately 
elongated, covered with minute scales, and with a silvery pigment 
interiorly. Head compressed, with the upp-r jaw longest. A seiiarate 
caudal, anterior and dorsal membrane, which is composed of a band 
of numerous short fringes, concealed in a longitudinal groove the hrst 
frin'^e prolonged. One anal fin; ventrals composed of about tour rays. 
Minute teeth in the jaws and on the vomer. Snout with barbies. Air 
bladder none. Pyloric appendages in small niiraher. It will be 
observed that in his definition Dr. Gunther regards the fringed membrane 
on the back as a fin, which appears to be more than doubttul; but 
the distinction of the genus is well made out, so as not to be 
confounded with any other. 
MACKAKEL MIDGE. 
Ciliata glauca, 
Motella glauca, 
(( 
CoucTiia minor, 
“ glauca. 
Couch ; in Loudon’s Magazine Hat. Hist., 
YOh T. 
Jexyns; Manual, p. 451. 
Yareeil; Br. Fishes, vol. ii, p. 281. 
Tuoitrsos ; Nat. Hist. Ireland, vol. iv, p. 190. 
Guntuer; Catalogue Br. Museum, vol. iv., 
p. 363. 
This is one of the smallest fishes of which I have any 
knowledge, so that even compared with the usual magnitude 
of the Gobies, it hides its diminished bulk; but on the other 
hand, when brought into comparison with the mighty whale that 
sea beast 
“which Gop of all his works 
Created hugest — that swim the ocean stream, 
Q 
VOL, lit, 
