54 M.0O.A.L, MORCH’S REVIEW OF THE VERMETID2. [Feb. II, 
evidently with a net; the state of their sexual organs shows that 
the spawning commences at that time of the year. It must be very 
difficult to catch the fishes after the middle of November, partly be- 
cause they retire into the deeper parts of the lake, and partly because 
the attempts to set nets are frustrated by the stormy weather of the 
season. Repeated endeavours to obtain more specimens, made by the 
Earl of Enniskillen, proved to be unsuccessful. In a letter from 
Mr. J. Walker, this gentleman mentions that he saw one taken with 
a fly in the month of August. 
The Earl of Enniskillen mentions, in a letter directed to Mr. 
Thompson, that the ‘‘ Freshwater Herring”’ is plentiful in the middle 
of November. ‘The people are now taking them in cartloads. 
The flesh of such as I send is white and soft, and different from 
what that of Charr is in any other lough.” Mr. Thompson* saw 
the female ; and, according to him, it is externally not different from 
the male. The ovaria contained 959 ova in a specimen 11 inches in 
length, each being two lines in diameter. 
Number of vertebree sixty, as ascertained by Thompson in a male 
and female fish, and by myself in two males, 
7. REVIEW OF THE VERMETID&. By Orto A. L. Morcu 
(or CopENHAGEN). (Part III.) 
[Concluded from Proc. Zool. Soc. 1861, p. 365.] 
Bryonta, Gray, 1850. 
The Bivine, Gray, Cat. Brit. Mus. 1842, p. 62. 
Bivonia, Gray, ibid. p. 90; Gray, 1850, in Mrs. Gray’s Fig. iv. 
p- 82.no, 3; Adams, Genera, i. p. 358. 
T. affiza, plerumque spiralis, apertura contracta circulari, sepe liris 
spiralibus interupto-nodulosis et lira mediana elevata ; columella 
levissima, nitida. 
Animal tentaculis cylindricis, filamentis pedalibus subulatis vel seta- 
ceis. Operculum parvum, rudimentare (Phil.). 
Dr. Gray gives (in the Brit. Mus. Cat. 1842, p. 62) the following 
character :—‘ The Livine have an orbicular spiral operculum, with 
an oblong lateral scar like the Trochi.” I suppose this description 
was made from a broken specimen, giving the muscular impression the 
appearance of being lateral. In the Brit. Mus. Cat. for 1840, quoted 
in Proce. Zool. Soc. no. 258, by Dr. Gray, I cannot find anything 
about this genus. The edition 1844, quoted in the same place, is, 
according to the indication of the pages 62 & 90, no doubt a typo- 
graphical error. In the Systematic Index of Mrs. Gray’s Fig. of 
Mollusca, p. 82, the diagnosis is altered thus :—‘ Operculum rudi- 
mentary, small (spiral?),” which is evidently taken from Philippi’s 
description of Vermetus triqueter, Biv.,—‘ Operculum parvum, rudi- 
mentare,” which must thus be regarded as the type. Of the other 
P * Ann, and Mag. Nat, Hist, 1841, vi. p. 443. 
