302 
ZOOLOGICAL LITERATURE. 
dona virescmSj sp. n., C. albicans j sp. n., Cyprides torosa (Jones). These were 
all found during the year 1863, in the counties of Northumberland and Dur-- 
ham : one of them ( Cypris affinis) is a continental species, but has not hitherto 
been found in England. To the description of these species are appended a 
few notes on the animal of Cyprideis torosa (Jones), and on its occurrence 
in a recent state, which was first announced by Prof. T. Rupert Jones, in 
brackish water at Gravesend ; it was afterwards found in fresh Avater by the 
Rev. A. M. Norman at Sedgelield, and also in brackish water at Weston- 
super-Mare, as well as at Hartlepool, and by the author at Warkworth; in 
the two last-named places it was found associated with marine Crustacea 
(viz. Palcemon varians, Or any on vulgaris^ and Gammarus locustd). 
Cyclopid^. 
Mr. John Lubbock, in a paper in the Linnean Transaction3j 
vol. xxiv. p. 197, describes seven species of the genus Cy clops ^ 
six of which have been found on the continent, but not previ- 
ously met with in England, namely, Cyclops serrulatuSj Fischer, 
Cyclops coronatusj Claus, Cyclops brcvicorniSy Claus, Cyclops 
brevicaudatus, Claus, Cyclops tenuicorniSi Claus, Cyclops can^ 
thocarpoides, Fischer. The seventh being new to science, he has 
named it Cyclops clausii. 
These were all taken in pools in Kent. 
PoNTELLIDiE. 
Mr. John Lubbock also describes from the same locality 
and in the same paper two species of Dlaptomus (Westwood), 
namely, Dlaptomus westwoodiij a new species, and Dlaptomus 
castor, Jurine. 
Argulidaj. 
In a full and interesting monograph on this family (CEfvers, 
af k. Vet. Akad. Forh. No. 1, p. 7), Prof. Thorell, after a short 
notice of the previous observations of others on the subject, says 
that his opinions on the family of the Argulidse differ consider- 
ably from those of previous writers, and shows in what he con- 
siders Kroyer, Gegenbaur, and others to be erroneous. He gives 
a very full description in Latin, with figures, of Argulus purpu- 
reus (Risso) and of Argulus coregoni, sp.n., and follows with an 
account of the habits of these parasites, which sometimes, accord- 
ing to Dr. Nystrom, so tease the fish on which they collect 
that their victim is red with blood. 
Prof. Thorell then treats of the affinity of Argulus with 
Siphonostoma, Pcecilopoda, Limulus, Apus, &c., and enters into a 
consideration of their structures. The author states that the 
parasitic mode of life is generally connected with an increase in 
the development of the appendages of the mouth, at least in 
those groups which have an absorbent vessel and an evidently 
