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BRITISH ENTOMOSTRACA. 
species the same degree of development and structure, and 
that in some species, Cliondr acanthus Lophii for example, 
only a single small specimen is found on each female, and 
in other species, on the contrary, two small specimens are 
found in the sexual apertures of a female, sufficient reason 
may be found to support Nordmann’s view, and to esta- 
blish its truth.” 
Gems 1 — Chondracanthus.* 
Chondracanthus, De la Roche, Nouv. Bull. Soc. Phil., ii, 1811. 
— Lamarck, Hist. An. s. Yert, edit. 2d, iii, 681. 
Chondracanthus (pars), M. Edwards, Hist. Nat. Crust., iii. 
Lernacantha, Blainville, Journ. de Phys., xcv, 442, 1822 ; Diet. Sc. 
Nat., xxvi. 
— Desmarest, Cons. gen. Crust., 350. 
Character . — Two pairs of foot-jaws prehensile, the third 
nearly rudimentary. Appendages of thorax representing 
the feet, in form of digitated, but not articulated, and not 
setiferous lobes or tubercles. Oviferous tubes very short, 
broad, and flattened. 
The genus Chon dracan thus was established by De la 
Roche in 1811, in the ‘Nouv. Bull, de la Soc. Philom./ 
upon a species of Lernea which he found attached to the 
Zeus faher , and which appears to be characterised by its 
exceedingly bizarre appearance, as if it were stuck over 
with horny spines or tubercles, and having the oviferous 
tubes short, broad, flattened, and nearly concealed be- 
tween the elongated, terminating, lateral prolongations. 
Blainville, in the ‘Journal de Physique/ 1822, in his 
monograph of the Lerneadse, established upon the same 
species his genus Lernacantha ; but the name of Chon- 
dracanthus has by most succeeding authors continued to 
be retained. 
* XovUpog, cartilage ; and aicavQa, spine. 
