236 
ZOOLOGICAL LITERATURE. * 
formse ac animal aclultiim, tliorace [pereion] seg-mentis septem totidem 
pedibus uncigeris instmcto, abdomine [pleon] segmentis sex, in qiiibus quinqiie 
paria pedum natatorioriim, ultimo appendicibus duabus simplicibus setigeiis. 
Epimera [coxm] in omnibus segmentis exceptis postremis, satis evoluta. 
JI. [ Cryptothiyiii] halani, sp. n., Bucliliolz, 1. c. p. 325, pis. xvi., xvii. figs. 1- 
18, on Bulamis ocularis (Lam.). This same species had previously received 
the same specific name from the Becorder, who considered, and still believes, 
that the figure of Buchholz of a young animal represents the perfect male. 
A complete liistory of this interesting and still imperfectly hiiowii genus is 
to be found in vol. ii. p. 257 of the ‘ British Sessile-eyed Crustacea.’ 
[Cryptot/nria'] Fdtoy aster payuri (male), llesse, Ann. des Sc. Nat. t. xvi. 
pp. 323 & 358, pi. xi. figs. 1-14. This species, which undoubtedly belongs 
to the genus Cryptotkiria (Dana), Liriope of Hat like & liilljeborg, M. Hesse 
elaborately describes as the male of the parasitic Peltoyaster, Avhich he there- 
fore proposes to remove from the Cirripedia and arrange with the Isopoda. 
But the larvae, as figured by M. Hesse, demonstrate their relation to the 
former, while Professor Lilljeborg has shown that the young of the female 
Cryptothiria, which is parasitic on Peltcyastcr, and Avhich M. Hesse has over- 
looked, contains the larvae of true Isopoda, the young Cryptotkiria. 
CrMOTHOIDTE. 
SciiioDTE (Naturliist. Tidsslc. pp. 168-206, I860) gives an ac- 
count of tlic sucking oi’al apparatus of Crustacea, the substance 
of which is indicated in the following paragraphs : — 
1. The sucking- apparatus of the Condyiopoda consists of a 
greater or less difterentiation of the prehensile mouth ; and the 
author considers it important to understand the correct homo- 
logies of the oral apparatus, in order to understand the nature of 
the mouth of Articulata in general. Savigny solved the problem 
in regard to Insects ; but Avith regard to Crustacea the author 
considers that there is almost everything to be done. 
2. He commences with the parasitic Isopoda, because as to 
the structure of the mouth so little is known. He gives the 
opinions of previous authors. 
3. Outline of the principal form of the prehensile mouth of 
Isopoda, Avhich he illustrates, pi. x. fig. 3«, by the inferior as- 
pect of the head of Cirolana. 
4. The author considers that a fundamental distinction betAveen 
the Crustacea and Insecta exists in the relation of the first pair 
of oral appendages to the lateral parts of the head. 
In Crustacea the mandibles do not project beyond the other 
oral appendages, and have the flexor muscles attached to a hy- 
postome, .except Avhen the cephalon is fused Avith the pereion. 
In Insecta the appendages coalesce Avith the lateral Avails of 
the head, and the muscles consequently disappear. 
5. In the cdriophthalmous Crustacea the first somite of the 
body [pereion] , the author says, is united to the cephalon, Avhile 
in the Insecta there is a distinct division betAveen the head and 
