Zoological Society. $47 
. both of very great rarity, which had recently come into his posses- 
sion: they were the Phasianus Semmeringii, Temm., and the Phas. 
versicolor, Ej. He accompanied the exhibition by some remarks on 
the subdivisions which appear to him to be required among the Pha- 
sianide generally ; and more especially on the position, among that 
extensive group, of the species exhibited. 
Mr. Bell read ‘‘ Some Account of the Crustacea of the Coasts of 
South America, with Descriptions of New Genera and Species; 
founded principally on the Collections obtained by Mr. Cuming and 
Mr. Miller. (Tribus 1, Oxyrhynchi.)” 
The skeleton was exhibited of a Coypus, Myopotamus Coypus,Comm., 
together with preparations of some of the viscera obtained from the 
same individual, which recently died at the Society's Gardens. With 
reference to them some notes by Mr. Martin were read, which are 
given in the Proceedings. 
Mr. Christy subsequently exhibited several skins of the Coypus, 
for the purpose of directing the attention of the Meeting to the po- 
sition of the mamme in the female, which are situated extremely high 
up the sides. 
Nov. 24.—Mr. Yarrell exhibited a specimen of the SyngnathusAcus, 
Linn., with the view of again* calling the attention of the Society 
to the fact that the males in this species of Pipe-fish are furnished with 
a pouch under the tail, in which they bear about with them the ova 
until the young have escaped from the capsule; and which probably 
serves also as a place of shelter to which the young can, for some 
time after their exclusion, retreat in case of danger. In this indivi- 
dual the opened abdomen exhibited the preparatory organs of the 
male; and the displayed subcaudal pouch showed many eggs con- 
tained in it, the young of which were fully developed and ready to 
escape from the capsules, while from others the young had actually 
escaped. As a guide to those observers who may be desirous of 
procuring specimens equally illustrative of the peculiarity of this 
fish, Mr. Yarrell mentioned that the individual exhibited was ob- 
tained on the 20th of July. 
Mr. Yarrell read some “‘ Notes on the Economy of an Insect destruc- 
tive to'Turnips”; which he prefaced by adverting to the importance 
to agriculture of an attentive collection of those entomological facts 
which relate to species injurious to the ordinary crops of the farmer. 
He then proceeded to remark that the turnip crop is in this country 
usually infested in every season by two species of Haltica; and that 
another destroyer has been, in the dry summer of this year, super- 
added to them, especially on the light and chalky soils. To the 
history of this latter pest, which has been known to occur in those 
seasons only in which there has been an almost total absence of rain, 
Mr. Yarrell’s paper is directed. A good account of a similar visita~ 
tion in 1782, as it was observed in Norfolk by Mr. William Marshall, 
was published in the ‘ Philosophical Transactions’ for the following 
year. 
Early in July last the “‘ yellow fly ” was seen upon the young tur- 
* See Lond. and Edinb. Phil. Mag., vol. vi. p. 383, 
2M2 
ms 
