422 Rev. A. M. Norman on two new British Isopods. 
of peduncle much narrower and shorter than the second; fla- 
gellum consisting of only about four joints, the first of which is 
twice as long as the last of the peduncle, and longer than the 
rest of the flagellum. Inferior antenne very long and slender. 
Telson as broad as long; margins crenulated, distally truncate 
and denticulate; the two external teeth on each side larger 
than the row of intermediate ones. Last wropods having both 
branches truncate at the extremity. 
Dredged in 40-60 fathoms on a muddy bottom, in St. Mag- 
nus Bay, Shetland, in the summer of 1867. 
Anilocra mediterranea, Leach. 
Anilocra mediterranea, Leach, Dict. des Se. Nat. vol. xii. p. 850; Desma- 
rest, Consid. sur les Crust. p. 8306; M.-Edw. Atlas du Régne Animal 
de Cuvier, Crust. pl. 66. fig. 1; Hist. Nat. des Crust. vol. iii. p. 257 ; 
Savigny, Hist. de ’Egypte, Crustacés, pl. 11. fig. 10; Heller, Carcin. 
Beitraige zur Fauna des adriatis. Meeres (Verh. d. k.-k. zool.-botan. 
Gesellsch. in Wien, 1866), p. 19, 
Body tumid, boldly arched, surface smooth, polished; co- 
lour black, mottled with yellow. ead narrower than pereion 
(which gradually increases in width to the hinder extremity 
of the fifth segment, whence it narrows posteally), projecting 
beyond the eyes into a process, which is as long as the rest 
of the head, nearly square, and bent downwards at the ex- 
tremity. yes confined to the sides, their combined breadth 
not more than equalling half that of the head. Superior 
antenne not as long as the head, flagellum of four joints. 
Inferior antenne short, reaching the middle of first segment 
of the pereion. Gnathopods and pereiopods glabrous, wholly 
devoid of spines or hairs; nails strong, hamate, and very 
sharply pointed. Last wropods with the inner branch only 
slightly exceeding half the length of the outer, subequal in 
length to telson; outer branch longer than peduncle, and 
much longer than telson, narrow, subfalciform, glabrous. 
Telson with a slight central keel, depressed near the base, 
rounded at the extremity, with smooth margins and polished 
surface. Length slightly exceeding one inch. 
Found on small fish in rock-pools at Herm in 1865. 
I sent a specimen to Mr. Spence Bate, for use in his work ; 
and I conclude that it must have been by some oversight 
omitted, though the specimen is still in his hands. 
EXPLANATION OF PLATE XXIII. figs. 12-15. 
Fig. 12. Cirolana truncata, Norman. Head and antenne, x 25. 
Fig. 13. The same. Mandible, x 40. 
fig. 14. The same. One of the anterior pairs of feet, x 40. 
Fig. 15. The same. Telson, x 16. 
