422 Rev. A. M. Norman on two neiv 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 antennce 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 urojpods 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 mediterranean Leach. 



Anilocra mediterranean Leach, Diet, des So. Nat. vol. xii. p. 350 ; Desma- 

 rest, Consid. sur les Crust, p. 306; M.-Edw. Atlas du Regne Animal 

 de Cuvier, Crust, pi. 66. fig. 1 j Hist. Nat. des Crust, vol. iii. p. 257 ; 

 Savigny, Hist, de I'Egypte, Crustaces, pi. 11. fig. 10 ; Heller, Carcin. 

 Beitrage zur Fauna des adriatis. Meeres (Verb. d. k.-k. zool.-botan. 

 Gesellsch. in Wien, 1866), p. 19. 



Body tumid, boldly arched, surface smooth, polished ; co- 

 lour black, mottled with yellow. Head 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. Eyes confined to the sides, their combined breadth 

 not more than equalling half that of the head. Superior 

 antennce not as long as the head, flagellum of four joints. 

 Inferior antennce short, reaching the middle of first segment 

 of the pereion. Gnathopods and jpereiojpods glabrous, wholly 

 devoid of spines or hairs ; nails strong, hamate, and very 

 sharply pointed. Last uropods 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. 



Fif/. 12. Cirolanat7'U72cata,'Novm.[m. Head and antennae, X 25. 

 Fig. 13. The same. Mandible, X 40. 



F'iff. 14. The same. One of the anterior pairs of feet, X 40. 

 Fiff. 15. The same. Telson, x 16. 



