204 
BRITISH ENTOMOSTRACA. 
Genus 2— Canthocamptus.* 
Monocultjs, Linnaeus , Fabricius, Jurine, &c> 
Cyclops, Muller , Ramdohr, Latreille , Desmarest , &c. 
Cyclopsina {pars), M. Fdwards. 
Canthocampus, Westwood, Partington’s Cyclop. Nat. Hist. art. Cyclops ; 
The Entomologist’s Text-Book, 115. 
Canthocarptjs ( wrongly quoted), Baird, Trans. Berw. Nat. Club, i, 97, 
and ii, 154; Mag. Zool. and Bot., i, 326. 
Harpactictjs {pars), Dana, Proc. Amer. Acad. Arts and Sc., 1847. 
Nauplius, Fhilippi, Ann. Mag. Nat. Hist., 1840 ; Wiegm. Archiv, 1843. 
Character . — Foot-jaws small, simple. Antennules 
simple. Ovary single, f 
1. Canthocamptus minutus. Tab. XXV, figs. 4-8; 
XXX, fig. 3. 
Cyclops minutus, Muller , Zool. Dan. Prod., No. 2409, 1776; 
Entomostraca, 101, t. 17, f. 1-7. 
— Ramdohr, Beyt. zur Naturg., 10-13, t. 3, f. 1-9. 
— Latreille, Hist. Nat. Crust., iv. 265. 
— Bose, Mem. Hist. Nat. Crust., ii, 25 7. 
— Lamarck, Hist. An. s. Yert., v, 189. 
* Erom aicavQa, a spine ; and KafnrroQ, flexible. 
f M. Edwards includes the Cyclops minutus of Muller in his genus 
Cyclopsina. The antennules, however, are not branched (biramees) as they 
are in Cyclops Castor , which is the character upon which the genus Cyclop- 
sina is founded ; and therefore it must form a separate 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 Wiegmann and Erich sen 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 allied to it, the genus Nauplius. As that name 
was used by Muller 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 Harpadicus in his Nauplius. 
