462 Miscellaneous. 
systematic zoology, are now those which excite the liveliest interest. 
Lophogaster typicus, a Crustacean discovered by M. Sars on various 
parts of the Norwegian coast, is one of these forms. 
Milne-Edwards combined the Euphauside and Myside with the 
Squillide and Amphionide to form an order distinct from the Deca- 
poda, and for which he retains Latreille’s name of Stomapoda. This 
order is characterized by the absence of thoracic branchiz lodged in 
an internal cavity. Dana has followed the same course, his orders 
Eubranchia and Anomobranchia being synonymous with Decapoda 
and Stomapoda. 
These orders are not, however, so distinct as they seem at first 
sight. The branchize of certain Macrourous Decapods (Alpheus, 
Hippolytes, Stenopus) are only partially covered by the carapace ; 
and Kroéyer has shown that in the genus Sergestes the sides of the 
carapace are not sufficiently prolonged to cover the branchiz. 
These exceptions sufficed to show that these two orders of Crustacea 
form a continuous series; but, by his description of Lophogaster, 
M. Sars has made us acquainted with a link which unites them still 
more intimately. 
In this Crustacean the thoracic branchie are ramified like the 
posterior branchize of the Luphauside. The upper part of the rami- 
fication is covered by the carapace in the manner of the branchiz of 
the Decapoda, whilst the median aud lower branches hang down 
freely in the water, as in the Huphauside. Other characters, to 
which it is unnecessary to advert, render the relationship of Lopho- 
gaster to both groups still more evident ; and thus it appears that 
the whole of the Podophthalmous Crustacea form a single natural 
order. The Stomapoda seem to be only degraded Macrourous 
Decapods—an opinion which is supported by Professor Dana. The 
development of Lophogaster is precisely similar to that of Mysis.— 
Bibl. Univ. Sept. 20, 1864, Bull. Sci. p. 87. 
On a Peculiarity in the Venation of the Leaves of the Genus Fagus. 
By Professor A. DeCanpoLie. 
In the ordinary condition the lateral veins cf a leaf occupy the 
centre of the lobes, or answer to the extremities of the teeth, when 
the leaf has lobes or teeth. Of the rare exceptions to this rule M. De 
Candolle has already indicated three in a note to p. 558 of vol. ix. 
of his ‘ Prodromus,’ namely, Coldenia procumbens, Linn., Crategus 
oxyacantha, Linn., and the Rhinanthi, in all of which the secondary 
ves correspond with the sinuses, and not with the projections, of the 
margins of the leaves. In the present paper he describes the occur- 
rence of the same structure in certain species of Fagus. 
Of the Beeches of the southern hemisphere, two, namely Fagus 
Gunnii, Hooker, and FI. antarctica, Forst., have the veins constantly 
and distinctly corresponding with a sinus; but in some cases the 
veins even of the same leaf, towards the extremity, run partly to 
the teeth and partly to the notches. This is the case in Fagus 
alpina, Popp. & Endl., and even in the common F. sylvatica ; but 
