394 



ISOPODA. 



NORMALU. 



IDOTEHLE, 



IDOTEID^E. 



(J 



IDOTEA ACUMINATA. 



Specific diameter. Long and narrow. Lateral margins of the segments of 

 the pereion more or less rounded. Legs subequal. Pleon composed of a 

 single joint, elevated along its middle and produced into an obtuse point. 

 Colour pale, with three paler longitudinal streaks, edged with dusky. 



Length, one-half to three-fourths of an inch. 



Stenosoma acuminatum. LEACH, Edinb. Enc. vii. p. 433. Trans. Linn. 



Soc. xi. p. 366. PENNANT, Brit. Zool. 4, 

 pi. 18, f. 3. (?) 

 WHITE, B. M. Cat. Brit. Crust, p. 66. Pop. Hist. 



Brit. Crust, p. 224. 

 RATHKE, Faun d. Krym, p. 384, pi. 6, f. 79. (?) 



Idotea acuminata. 



Idotea capita. 



OUR figure of this species was taken from Dr. Leach's 

 type in the British Museum (No. 1,002). It is unfortu- 

 nately in very bad condition, having been pinned whilst 

 in a soft state, so that the sides of the body have curved 

 downwards, and our figure consequently represents the 

 animal as having its lateral margin much too continuous, 



