164 AMi'niroDA normalta. 



yond the precedinp:, and scarcely beyond the telson. Telson long, 

 conical, tipped with nidimentar)' rami (?). 

 Length ^■'x, ths of an inch. 



Hah. In a sponge, under the Hoe, Plymouth {Mr. Howard Stetvart); 

 Polperro (Mr. Loughriri) ; Naples (Costa). 



Some specimens, taken with this, have no tooth upon the carpus of 

 the anterior pair of gnathopoda ; these, I think, are females of the 



same species. 



2. Microdentopus Websterii. (Plate XXX. fig. 2.) B.M. 



Lembos Websterii, Spence Bate, Ann. Nat. Hist. Feb. 1857. 

 niiite, Hist. Brit. Crust, p. 180. 



Male. — Superior pair of antennas having the secondary appendage two- 

 or three-articulated. Fii'st pair of gnathopoda having the carpus 

 as long as the propodos, and both fringed with long hairs upon 

 the superior and inferior margins ; propodos ovate, palm short, 

 scai'cely oblique, the inferior angle developed into a long obtuse 

 tooth ; daetylos having the internal margin smooth. Second pair 

 of gnathopoda having the carpus longer than the propodos, both 

 furnished with long hairs upon the superior and inferior margins ; 

 propodos ovate, tapering, palm oblique, scarcely defined ; daetylos 

 having the internal margin serrated. The rest of the description 

 approximates to that of M. Gri/lhtalpa. The colour of this species 

 is grey, deepening almost to black in the anteiior and dorsal region 

 of the pereion and cephalon. When diied, the siu'face exhibits 

 prismatic hues. 



Length ^ths of an inch. 



Hab. Falmouth (Mr. Webster) ; Skye and Shetland (Mr. Barlee). 

 I have named this species after its discoverer, who has kindly sent 

 me the results of his dredging from several localities. 



3. Microdentopus anomalus. (Plate XXX. fig. 3.) B.M. 



Ganimainis anomalus, Bathhe, Ada Leop. p. 6-3. tab. 4. f. 7, 1843. 



Liljehorg, Ofrers. af Kon(jl. Vet. Ahad. Forhandl. 1854, p. 457. 

 Lembos Cambriensis, Spence Bate, Brit. Assoc. Report, 1855; Ann. 

 Nat. Hist. Feb. 1857. 



IMiite, Hist. Brit. Crust, p. 180. 



Female. — The three anterior segments of the pleon having the infero- 

 posterior angle produced to a point. Eyes black, long-oval. 

 Peduncle of the superior pah* of antennae reaching to the extremity 

 of the jieduncle of the inferior ; secondary appendage four-articu- 

 lated. First pair of gnathopoda having the carpus shorter than the 

 propodos ; propodos ovate, palm convex, not defined, fringed with a 



