CRtJSTACEA. 
299 
by M. Hesse, but in distinctions of a specific value, from Mon- 
tagues genus Pranizay which Leach many years since supposed 
to be the female of AnceuSj and which M. Hesse has now 
demonstrated to be so. 
The seventh section is on the habits and manners of Anceus. 
The eighth is on their food. The ninth section discusses the 
classification of the genus, in which M. Hesse thinks that Anceus 
should be placed in a section between the Cymathoidjc, with 
which it has much in common both in form and habits, and 
the sedentary Isopods or EpicarideSj^ which, like them, are 
suctorial Crustacea. 
M. Hesse has enumerated no less than twelve species, without 
counting two females of which the males are not known to him ; 
of these, all are new to science except one, Anceus rapaxl 
These he arranges under four different heads, according to 
the conformation of the mandibles of the males. 
1. Mandibles in the form of pincers, denticulated only at their extremities. 
Anceus formica^ Anceus hrivatensis. 
2. Mandibles in the form of an axe, the internal border being denticulated. 
Ailceus asciaferus. 
. 8. Mandibles falciform, with the internal margin entire, but showing the 
impressions of denticulation ; the external margin strengthened with a ridge 
(bourrelet). 
Anceus erythrinus, Anceus falcarius, Anceus manticorus, 
4. Mandibles falciform, with the internal margin denticulated, and without 
a strong ridge on the external margin. 
Anceus triglif Anceus scarites, Anceus htpi, Anceus rapaXy Anceus verruco- 
sus, Anceus surmulcti. 
It is a very remarkable circumstance, that among so many species, all of 
which are found at Brest, the species so common on the coast of Cornwall 
and Devon (Anceus maxillaris) does not occur. 
BoEyridal. 
The name of JBopyroides is proposed as S, generic name by Dr. Stimpson 
(Proc; Acad. Nat. Sc. Philad. 1864, p. 166) for those Species of this family 
which resemble the genus Bopyrus in form, but possess only rudimentary bran- 
chial pleopoda in the female, “ being merely fleshy ridges instead of laminae.” 
The species on which he founds the genus was taken on Jlippolyte hrevirostris, 
and he names it Bopyroidcs acidimarginatus. He thinks that Bopyrus hippo- 
lylcs, Kroyer, belongs to this genus. 
In the Report of the Newcastle meeting of the British Association, pub- 
lished 1864, a new species of lone of Montagu, from Vancouver’s Island, was 
described by Mr. Spence Bate under the name of Icnw cornuta. It was taken 
from beneath the carapace of Callianassa longimana. The author was also 
enabled to describe and figure the larva and male. (See also Proc. Zool. Soc. 
1804, p. 668.) 
In the Annales des Sciences Naturelles (vol. ii. sdr. 6. p. 289, and Supple- 
ment, p. 325) Prof. Lilljeborg communicates the substance of a memoir that 
had been previously published by him in the Acta Nova RegisB Societatis Scien- 
