36 isoroDA. 



TANAOPSIS LATICAUDATA, G. 0. Sars. 



1886. Tanaopsis laticaudata, G. O. Sars, " Middelhavets Saxipoder. 



p. 353, pi. xv. figs. 14-17. 

 1896. Tanaopsis laticaudata, G. 0. Sars, Crust. Norway, Isopoda, 



pi. 32, pi. xiv. fig. 1. 



Plymouth Sound, 1903 ; Exmouth, 1904 (A. M. NJ. 



Tribe II. FLABELLIFERA, G. 0. Sars. 



Fam. 1. ANTHURID^E. 

 ANTHURA GRACILIS (Montagu). 



1866. Antliura gracilis, Bate & Westwood, vol. ii. p. 160. 



1886. Anthura gracilis, Norman & Stebbing, " Crust. Isopoda of 



' Lightning,' ' Porcupine,' and ' Valorous ' Expeditions," Trans. 



Zool. Soc. vol. xii. p. 122, pi. xxv. figs. 3, 4. 



Devon (Montagu) ; Thatcher Rock, Torbay ( Walker, fide 

 Bate} ; Torquay (Stebbing) ; Ilfracombe and Plymouth (A. 



M.N.); Salcombe(TW). 



" On June 131 found a male AntJnira gracitts, 4 mm. long., 

 provided with an antennal flagellum of nine joints, each of 

 which was encircled by a dense ring of long slender hairs. 

 Another specimen, dredged on September 16th, was 5 mm. 

 long ; the antenna? were as long as the head and first two 

 segments of the pereion, and each of the twelve joints of the 

 flagella was encircled by hairs, as in the preceding specimen. 

 The discovery of these specimens confirms in an interesting 

 manner the prediction of Norman and Stebbing concerning 

 the secondary sexual characters of the adult male of this 

 species (Trans. Zool. Soc. xii. p. 123) " (Garstang, ii. 

 p. 337). 



Fam. 2. GNATHIID^E. 

 GNATHIA MAXILLARIS (Montagu). (PI. II. figs. 1-8.) 



1866. Anceus maxillaris, Bate & Westwood, vol. ii. p. 187. 



It is not improbable that more than one of the Ancei named 

 by Hesse are referable to this species. 



The frontal margin (fig. 5) is furnished with three pro- 

 jections, of which the central is widest, flattened and some- 

 what concave distally. The mesosome may be said to consist 

 of six segments, since behind the cephalosome there exists a 

 narrow fillet which indicates the first of these segments ; the 

 fourth segment is elevated into hump-like processes at the 

 sides over the base of the legs ; the last two segments are 



