CATALOGUE OF BRITISH CRUSTACEA. 
65 
Arrnida, Risso, Eur. Mer. v. 109. 
Gonotus, Raf. Free. p. 26. 
Oniscus, pt. Linn. 
Entomon, Klein. 
Squilla, pt. Degeer, Mem. vii. 
Asellus, pt. Oliv. Enc. Meth. iv. 
1. Idotea pelagica. Marine Idotea. 
Idotea pelagica, Leach , Linn. Trans, xi. p. 365 ; Desm. Cons. p. 
289; M. Edw. Crust, iii. p. 129. 
Oniscus balticus, Pallas, Spic. Zool. ix. t. 4, f. 6 ? 
Idotea marina, Fabr. Ent. Sgst. Suppl. p. 303 ? 
Rhaetia pelagica, Leach, MSS. 
a — g. British Coast. (Bell Rock). From the collections of Col. 
Montagu and Dr. Leach. 
2. Idotea tricuspidata. Three-toothed Idotea. 
Idotea tricuspidata, Desm. Cons. p. 289 ; Roux, Crust. Med. t. 13. 
f. 11, 12 ; M. Edw. Crust, iii. p. 129. 
Oniscus tridens, Scop. Ent. Cam. 
Idotea entomon, Leach, Linn. Trans, xi. p. 364. 
Idotea tridentata, Lair. Gen. Crust, et Ins. i. p. 64. 
.< a — z. British Coast, Scotland and England. From the collections 
of Col. Montagu and Dr. Leach. 
a* — c.* Cornwall. Presented by W. P. Cocks, Esq. 
3. Idotea emarginata. Notched Idotea. 
Idotea emarginata, Fabr. Ent. Sgst. Suppl. p. 303 ; M. Edw. Crust. 
iii. p. 130 ; Cuv. R. A. (Croch.) t. 69, f. 2. 
Cymothoa emarginata, Fabr. Ent. Sgst. ii. p. 508. 
Squilla marina, Degeer, Ins. vii. p. 522, t. 32, f. 11, 14. 
Idotea excisa, Bose. Crust, ii. p. 181 ; Lair. Crust, vi. t. 58, f. 5, 
var. ? 
Idotea peloponesiaca, Roux, Crust. Med. t. 30, f. 10. 
a — s. British Coast. From the collections of Col. Montagu and 
Dr. Leach. 
