214 HISTORY OF BRITISH CRUSTACEA. 



being in an upright position. It was a most awkward 

 attempt, and though there was much effort there was little 

 effect." 



Fam. CAPRELLIDJU. 



Body elongated, cylindrical, and very narrow. Pour well- 

 developed antennae. Legs long and slender. Coxae fused 

 with the body of the animal. 



Animals not parasitic. 



Gen. 104. CAPRELLA, 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 behiud. 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. 



