CRUSTACEA. 
249 
riorly. The first somite of the pcreioii is small, the next two are suhequal, 
and the last is largo and deep, equal in length to the three preceding. On 
each side is a transparent lohe containing the genital apparatus and intended 
for the reception of the ova. Pleon short and cylindrical. Antenna} short, 
cylindrical, consisting of 12 articuli. Cephalon small and rounded anteriorly 
and depressed. Pereiopoda hiramose, and much resembling in form and 
position those of Notopteropliores. 
LERNEOSIPIIONOSTOMIDiE. 
Leposphilus, gen. nov., Hesse, Crust, nov. des cotes de France, Ami. des Sci. 
Nat. t. V. p. 277. Animal {‘‘ corps ”) fusiform, divided into ten distinct seg- 
ments, of which four belong to the pereion .and six to the pleon*. Cephalon 
small, having a central dorsal eye, and furnished inferiorly with a probosci- 
diform siphon, some denticulated maxillae, and three pairs of prehensile 
maxillipeds. Antennae ver}’- small, rounded at the extremity, and furnished 
with divergent hairs. Pleon retractile, the ultimate segment furnished with 
divergent appendages. Embryo oval, provided Avith three pairs of appen- 
dages. Ova agglutinate, and found in a large flat dorsal mass. Male un- 
Icnown. Lephosphilus lahrei, sp. n., Hesse, p. 278, found on the Green 
Wrasse. 
CIRRIPEDIA. 
Zcjias anatifera (L.), Heller, Carcin. des adriat. Meeros, Yerhand. d. 
zool.-bot. Gesell. Wien, p. 758. 
Conchoderma (jracile, sp. n., Heller, p. 758, a delicate little species, para- 
sitic on the gills of Maia sqiiinado. 
Scalpcllum vulgarc (Leach), Heller, p. 750. 
Chthamalus stcllatifs (Poli), Heller, p. 759. 
Chclonohia testudinaria (L.), Heller, p. 750, on Chtionia carcltu. 
M. Hesse, whose industry and research are so largely adding 
to the history of the Hare or netv Crustacea of tlie Coasts of 
France,"’^ in his tenth article, in the Ann. des Sci. Nat. t. vi. 
p. 3.21, treats of the parasitical Cirripedes Peltogaster and 8ac- 
culina. He considers that he has discovered the male of the 
former genus in the cliaracter of an Isopod, and therefore asserts 
that Peltogaster belongs to that order and not to the Cirripedes. 
But Professor Lilljeborg has already shown {vide genus 
^ Record,"’ 1864) that this Isopod is a parasite on Peltogaster, 
and that, while the parasite belongs to the family Popyridoi 
among the Isopods, Peltogaster belongs to the Cirripedes. M. 
Hesse appears not to have remembered that Professor Lilljeborg, 
besides the male, also discovered the female parasitic on Pelto- 
gaster] and while the larvpe of the former were developed as 
those of an Isopod, those of the latteT were developed on the 
type of the Cirripedes. To this conclusion M. Hesse^s researches 
also add confirmation ; for he both describes and figures the 
larvae of Peltogaster upon the type of those of a Cirripede. But 
* The author says four arc thoracic f but, according to his figures, the 
cephalon is included in this expression. 
