214 HISTORY OR BRITISH CRUSTACEA. 
being in an upright position. It was a most awkward 
attempt, and though there was much effort there was little 
effect" 
Tam. CAPRELLIDJZ. 
Body elongated, cylindrical, and very narrow. Four well- 
developed antennae. Legs long and slender* Coxae fused 
with the bodv of the animal. 
•/ 
Animals not parasitic. 
Gen. 104. CAPBELLA, Lam . 
Second and third thoracic rings without legs, but each 
furnished with a pair of branchial vesicles or lamellae. 
Head swollen in front and narrowed behind. First pair of 
antennae much longer than second pair, which latter are 
pediform. 
Mr. Henry Goodsir^ says they cast their skins often : be- 
fore the process commences, the animal is so languid as to 
appear dead; a slight quivering motion then takes place, 
when the skin bursts transversely on the head and down the 
middle thoracic segments. 
Caprella linearis. Pennant's Skeleton Screw . — Head 
* Edin. New Phil. Journal, xxiii. 
