ME. E. J. MIEES OK THE IDOTEID^. 83 



segments, being as broad as they, but much sborter, witli the 

 postero-lateral angles rather prominent ; the two following seg- 

 ments are very narrow-transverse. The terminal segment is very 

 long, very convex in the middle, abruptly deflexed toward the 

 lateral and posterior margins, with the lateral margins parallel, 

 directed somewhat inward toward the distal extremity ; the poste- 

 rior margin deeply excavated. The eyes are inserted behind the 

 antero-lateral angles. Antennules very short, reaching to the 

 end of the second antennal joint, with the terminal joint elon- 

 gate-conical, and quite as long as the preceding cylindrical joint. 

 The antennge, when retracted, reach to the posterior margin of 

 the fourth thoracic segment, and are 6-jointed ; the joints 

 decrease in thickness, but increase in length, from the base to the 

 distal extremity ; the basal joint is short and annular, the second 

 and third joint with a dentiform process on its inner and upper 

 distal margin and with a notch on the underside. Legs as in 

 C. linearis. Epimera narrow, elongate-triangular, posteriorly 

 acute. On the second, third, and fourth segments they appear 

 shorter than, and occupy the anterior half of the lateral margins ; 

 on the three following segments they are anteriorly distinctly 

 broader, occupy the whole of the lateral margins, and posteriorly 

 even project somewhat beyond them. The whole surface of the 

 body is finely granulated. Colour appears to be light brownish ; 

 legs and antennae yellowish grey. Length a little under \^ inch 

 (22 millim.). 



St. Paul. 



As I have seen no specimens of this species, the desci'iption is 

 taken from Prof. Heller's work. 



The following are species which have been referred to the 

 IdoteidcE, but belong to other families : — 



Idotea psora (Linn.), Pabr. ; Idotea physodes (Linn.), Pabr. ; 

 Idotea albicornis, Pabr. ; Idotea aquatica (Linn.), Pabr. ; Idotea 

 scopulorum (Linn.), Pabr. ; Idotea penicillata, Eisso, on which 

 M. Eisso subsequently founded the genus Oliska. 



The Idotea evplectellce, Laudois, Jahresb. Westf. prov. Ver. 

 p. 42 (1878), inhabits Eiiplectella aspergillum, and is, according 

 to Dr. Bertkau (Arch. f. Nat. Band xlvi. p. 272, 1880), very 

 probably identical with Cirolana multidigitata. I have not seen 

 Landois's description. 



The species of the curious blind genus Cceeidotea, Packard, from 



6* 



