204 BRITISH ENTOMOSTRACA. 



Genus 2— Canthocamptus.* 



MoNocuLTJS, Linnceus, Fabricius, Jurine, &c. 



Cyclops, Midler, Ramdohr, Latreille, Desmarest, &c. 



Cyclopsina (pars), 31. Edwards. 



Canthocampus, Westwood, Partington's Cyclop. Nat. Hist. art. Cyclops ; 



The Entomologist's Text-Book, 115. 

 Cajv^thocarpus {tcro7i(jli/ quoted), Baird, Trans. Berw. Nat. Club, i, 97, 



and ii, 154; Mag. Zool. and Bot., i, 326. 

 Hakpacticus {jmrs), Dana, Proc. Amer. Acad. Arts and Sc, 1817. 

 Natjplius, VUlipin, Ann. Mag. Nat. Hist., 1810 ; Wiegm. Ai-cbiv, 1843. 



Character. — Foot-jaws small, simple. Antennules 

 simple. Ovary single, f 



1. Canthocamptus minutus. Tab. XXV, figs. 4-8; 

 XXX, fig. 3. 



Cyclops minutus, Midler, Zool. Dan. Prod., No. 2409, 1776; 

 Entomostraca, 101, t. 17, f. 1-7. 



— Ramdohr, Beyt. zui- Naturg., 10-13, t. 3, f. 1-9. 



— Latreille, Hist. Nat. Crust., iv. 265. 



— Rose, Mem. Hist. Nat. Crust., ii, 257. 



— Lamarck, Hist. An. s. Vert., v, 189. 



* Erom aicavGa, a spine ; and KafiirroQ, flexible. 



f M. Edwards includes the Cyclops minutus of Miiller in his genus 

 Cyclopsina. The antennules, however, are not branched (biramees) as they 

 are in Ci/clops Castor, which is the character upon which the genus Cyclop- 

 sina is i'ouuded ; and therefore it must foi'm a sepai-ate genus. The name 

 Canthocamptus was proposed for it by Mr. Westwood, some years ago, from 

 the flexible, horny appendage attached to the abdomen of the female. In 

 Partington's Cyclopaedia, art. Cyclops, and in the ' Entomologist's Text- 

 Book,' this genus is indicated by Mr. Westwood, but misprinted Cantho- 

 campus ; and it was farther misnamed by myself (quoting it from memory) 

 in the 'Trans. Berw. Nat. Club,' i, Canthocarpus ; reproduced again in the 

 ' Mag. Zool. and Botany,' and in the second vol. of the ' Berw. Club Trans.' 

 Philippi, in the Archiv, of Wiegmaun and Ericbsen for 1843, confirms my 

 observations upon the structure of the antennules, and the propriety of 

 separating the species from the genus Cyclopsina of Edwards. He forms of 

 it, and some other species alUed to it, the genus Naujdius. As that name 

 was used by Miiller for the young of the genus Cyclops, and as the genus 

 Canthocamptus was shortly characterised by Mr. Westwood in the work 

 quoted above as early as 1836, I have given the preference to Mr. West- 

 wood's appellation, as having the priority in date. Philippi, moreover, in- 

 cludes the genus Karpacticus in his Nuuplius. 



