348 : THE REY. T. R. R. STEBBING ON 
cystis on Dec. 29, 1910, and at various other dates, by hand-net 
from bed of Macrocystis in Roy Cove, from a depth of between 
3 and 4 fathoms, and in the same locality two specimens from a 
depth of 6 fathoms, on which he notes that one was banded red 
and chocolate in colour, and the other cream-coloured with 
chocolate markings. 
ISOPODA ANOMALA 
(or Apseudacea). 
1902. Zsopoda anomala Stebbing, 8. African Crustacea, pt. 2, 
p- 48. 
GAO} i Fe Stebbing, Ann. 8. Afr. Mus. vol. vi. 
pp. 413, 576. 
Fam. TANAID&. 
1905. Tanaide H. Richardson, Bull. U.S. Mus. no. 54, p. 3. 
1905. Ry Stebbing, Herdman’s Pearl Fish. Rep., no. 23, 
p- 2. 
LOWS: A Nierstrasz, Siboga-Expeditie, Mon. 32 a, p. 20. 
The last of these references supplies an ample bibliography of 
the Apseudacea. In my own treatise above mentioned, on p. 4, 
T attribute to Sars the statement that in his genus Heterotanas 
the palp of the first maxilla is terminated by a single seta, a 
mistake for which I cannot account, as he distinctly states that 
there are two sete. The distinction which he does in fact draw 
is that in Tunais the palp is biarticulate and tipped with several 
sete, but in Heterotanais uniarticulate with the sete 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 Vanais those 
species which have six separate pleon segments instead of only 
five. But even on this point authors are 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. 
Asin Tanais, it has only three pairs of pleopods. Its form is 
robust like that of J’. robustus Moore, but while that species has 
seven setze on the palp of the first maxilla, this has only two. It 
shows points of agreement with the much smaller 7’. sewrate 
Nobili, 1906-1907, but there the second joint of the second 
antenne is much shorter than the first, here the reverse is the 
case. 
The late Dr. Nobiliin 1907 gives the family name as Tanaidide. 
As, however, the genitive case of Vanais, in Latin, is the same 
as the nominative, it can scarcely be necessary to alter the 
accustomed form. 
