REY. T. R. R. STEBBING—CRUSTACEA ISOPODA AND TANAIDACEA. 215 
Reports on the Marine Brotocy of the Supanese Rep Sea.—XIV. On 
the Crustacea Isopopa and Tawnarpacea. By the Rev. THomas R. R. 
Srepsine, M.A., F.RS., F.L.S., F.Z.8., Hon. Memb. New Zealand 
Institute, Hon. Fellow Worcester Coll., Oxford. 
(PLATES 21-23.) 
| Read 16th December, 1909. | 
Tue collection contains fifteen species, distributed over twelve genera. Two 
of the species, one as larval, the other as imperfect, are left unidentified. 
Of the remainder, four are regarded as new and present points of interest 
noted in the several accounts relating to them. Three of the four new 
species are based on specimens of very small size. In one case only a single 
specimen was available, and where the largest number was in hand, all three 
specimens were imperfect. Under these circumstances the collection may 
be regarded as having yielded a fairly creditable result, especially as it was 
made in a part of the world where investigators have been frequently at work. 
Tribe CHerirera. 
Family TANAID &, 
Genus Tanals, Audouin § Milne-Edwards. 
1828. Tanais, Audoutn & Milne-Edwards, Précis d’Entomologie, p. 46, pl. 29. fig. 1. 
1905. Tanais, Stebbing, in Herdman, Ceylon Pearl Fish., Suppl. Rep. 28, p. 2. 
1905. Tanais, H. Richardson, Bull. U.S. Nat. Mus. No. 54, p. 7. 
TANAIS PHILETZRUS, Stebbing. 
1904, Tanais phileterus, Stebbing, Spolia Zeylanica, vol. ii. pt. 5, p. 7, pl. 2. 
A female specimen, having the bilaminar and very prominent marsupium 
loaded with eggs, shows no characters that would justify its separation from 
the species named. The thumb of the first gnathopods is oval, instead of 
having an irregular inner margin, but the armature is similar to that of the 
male, the inner border being fringed with sets, here six in number, and 
the apex carrying a short strong spine. The eyes and antenne and three 
pairs of pleopods agree with those of the male. The uropods are four-jointed, 
and here the first or peduncular joint is a little longer than any one of the 
three subequal flagellar joints. 
Length 2°5 mm. 
Locality. Label: Crustacea, Quay wall, Dec. 04, Crossland coll. 
LINN. JOURN.—ZOOLOGY, VOL. XXXI. 18 
