IDOTEA TRICUSPIDATA. 379 
ISOPODA. IDOTEIDA. 
NORMALIA, 







IDOTEA TRICUSPIDATA. 
Specisic character. Elongate-subovate ; lower antenne nearly half the 
length of the animal. Segments of the pereion (except the first) with dis- 
tinct_coxal plates (epimerz) occupying the whole lateral margin. Pleon with 
the first and second segments distinct, the third soldered in the middle to the 
terminal large joint, which is more or less tridentate at the tip. 
Length of the body, about one inch and a third. 
Idotea tricuspidata. | Dusmarzst, Cons. Crust. p. 289 (and pl. 46, f. 11?). 
Roux, Crust. Medit. t. 29, f. 11, 12. MuLne 
Epwarps, Crust. iii. p. 129, Warn, B. M. Cat, 
Brit. Crust. p. 65. Pop. Hist. Brit. Crust. 
p. 223, pl. 12, f. 2. Gossz, Man. Mar. Zool. 1, 
fig. 247. 
Oniscus tridens. Scoponr, Ent. Carniolica. Oxivier, Enc. Méth. vi. 
p. 26. 
Tdotea Entomon. Pennant, Brit. Zool. 4, pl. 18, f. 5. Leacu, Linn. 
Trans. xi. p. 364. 
A { ’ \ \ { 
a ' ie: Nees QR LIMP es S .' \YoKA 
