348 TUE RKV. T. R. 11. STEBI51NG UN 



cj/.siis on Dec. 29, 1910, and at vniious otliei- dates, hy liand-iiet 

 from bed of 2Iacrocj/,siis in Hoy Cove, fioni a dt'ptli of between 

 3 and 4 fatlionit^, and in tlie same locality two specimens fiom a 

 depth of 6 fathoms, on which he notes th;it one was banded red 

 and chocolate in colour, and the other cream-coloured with 

 chocolate markings. 



ISOPODA ANOMALA 

 (or Apseudacea). 



1902. Isopoda cmoinala Stebbing, S. African Crustacea, pt. 2, 



p. 48. 

 19J0. „ „ Stebbing, Ann. S. Afr. Mas. vol. vi. 



pp. 413, 576. 



Fam. Tana ID ^. 



1905. Tavakloi H. Richardson, Bull. U.S. Mus. no. 54, p. 3. 

 1905. ,, Stebbing, Herdman's Pearl Fish. Rep., no. 23, 



p. 2. 

 1913. „ Nierstrasz, Siboga-Expeditie, Mon. 32 a, p. 20, 



The last of these references supplies an ample bi])liogr:iphy of 

 the Apseudacea. In my own ti'eatise above mentioned, on p. 4, 

 I attribute to Sars the statement that in his genus Ileterotunais 

 the palp of the fii-st maxilla is teiininated by a single seta, a 

 mistake for which I cannot account, as he distinctly states that 

 there are two setse. The distinction A\hich he does in fact draw 

 is that in Tanais the palp is biai'ticulate and ti})ped with several 

 seta?, but in lleterotanais uniarticulate with the setae only two. 

 These minute features have been so seldom attended to in 

 descriptions, that they are difficult to use for the settlement of 

 genera. It might be convenient to withdraw from Tanais those 

 species which have six separate pleon segments instead of only 

 five. But even on this point authors ai'e not always as definite 

 as could be desired. The species about to be described belongs 

 clearly to the group in which the pleon has six separate segments. 

 As in Tanais, it has only three piiirs of pleopods. Its form is 

 robust like that of T. robiistus Moore, but Avhile that species has 

 seven setse on the palp of the first maxilla, this has only two. It 

 shows points of agreement with the much smaller 7\ seurati 

 Nobili, 1906-1907, but there the second joint of the second 

 antennfe is much shorter than the first, here the reverse is the 

 case. 



The late Dr. Nobiliin 1907 gives the family nam.e as Tnnaididte. 

 As, however, the genitive case of Tanais, in Latin, is the same 

 as the nominative, it can scarcely l)e necessarj' to alter the 

 accustomed form. 



[8] 



