BOPYRUS SQUILLARUM. 219)” 
(Oniscus sq.). GoopsIR, in 
Ann. Nat. Hist. xi. p. 75, pl. 
7.  Mutne Epwarps, Crust. 
iii, p. 282. Wurtz, Cat. Brit. 
Crust. (Brit. Mus.) p. 82. 
Pop. Hist. Brit. Crust. p. 256. 
Monoculus Crangorum. Fasricius, Ent. Syst. Suppl. p. 
306. Bosc, Hist. Crust. ii. 
216 (Bopyrus cr.). 
Insecte qui s attaché a la brevette. Fouceroux pg BonpAroy, Mém. 
Acad. Se. 1772, p. 29, t. 1. 
(Var.?) Bopyrus Paleemonis. Risso, Crust. de Nice, p. 148. 
Lamarce, Op. Cit. p. 165. 
DrsMAREST, Crust. p, 326. 
Tuts species has long been known in consequence of 
its occurrence, during the summer months, beneath the 
carapace of the common edible prawn, the presence of 
the female causing a large tumour, of nearly half an 
inch in diameter, on the side where the parasite affixes 
itself. The female, in the ordinary condition, is flat- 
tened and broadly ovate in form, and the minute male is 
generally to be found fixed amongst the respiratory 
plates on the underside of the tail of the female. The 
male closely resembles one of the Jdotee in miniature, 
having the body elongate and narrow, with rounded, 
flattened lobes at the sides of the segments of the body, 
and with the tail of a reversed, triangular form, rounded 
at.the tip, with the six segments only indicated by five 
incisions on each side, being confluent on the disc. The 
antennz are very short, and resemble those of the 
female, and the legs are also very short, although strong 
and chelate. 
The female is broadly ovate, but having the pleon 
somewhat narrower than the pereion, flattened and 
curved either to the right or left,* according to the side 
* This curvature is occasioned by the unequal pressure from the carapace 
of the prawn. 
