4(5 
J. M. Thomson. 
Latreille, P. A., 1806 : Genera Crustaceorum et Insectorum secundem ordinem, 
naturalem in familias disposita, ieonibus exemplisque plurimis explicate, T.I.. 
Paris. 
Sars, G. O., 1894: Crustacea of Norway I. Amphipoda. 
Sehellenberg, A., 1928: Cambridge Exp. to Suez Canal. Ampliipoda. Trans. Zooh 
Soc. Lond.j XXI F, pp. 633-692. 
Stebbing, T. R. R., 1904: Gregarious Crustacea from Ceylon. Spolm Znjlan<ca, 
Vol. 2, pp. 1-29. 
1906: Amphipoda Gammaride. Das Tierreich. Lief. 21 (1). 
1914: Crustacea from the Falkland Islands. Proc. Zool. Soc. Land., 1914, 
pp. 341-378. 
Walker. A. O., 1914: Species of Amphipoda taken bv “Suna, M July and August,, 
1913. 
Ann, Mag. Nat. Hist. (8) 13', pp. 558-561. 
Order: ISOPODA. 
Suborder : FLABELLIFERA. 
Fami ly: ANTHURIDAE. 
CRXJRANTHURA gen. nov. 
Gmranthura simplicia sp. nov. 
Occurrence. 
June to September; twelve specimens being taken during this period.. 
Among algae. 
Female. 
Length 5-25 to 6 mm. (ovigerous) . Body elongate, narrow, back 
bioadly arched, surface smooth. Ratio of lengths of thoracic segments 
9:11:10:12:12:9:4. The seventh thoracic segment is wider than the ab- 
dominal segments. Abdominal segments 2-5 fused dorsally, though the 
suture may still be distinguished laterally. 
Head: Eyes large, situated in the prominent antero-lateral lobes. An- 
terior margin excavate for reception of antennae, with a conspicuous 
median rostral point. Dorsally there are scattered patches of dark pig- 
ment. The mouth parts are adapted for sucking. 
Appendages . First antenna 4 segmented, basal segment long, widening' 
distally. The fourth segment (flagellum) shows a distinct constriction at 
about two-thirds of its length, possibly indicative of a fused segment. Tt 
bears a thick bunch of setae on a slight prominence apically. Second 
antenna of five joints, the last densely setiferous, the basal segment the 
longest, penultimate the next longest. 
Mouth Parts: Unfortunately only the maxilliped and second maxillae 1 
dissected out well, but as far as could be ascertained the mandible had no 
palp, or else a very reduced one. Second maxillae straight with short lateral 
teeth distally. Maxillipeds, two-segmented, the proximal portion fused to- 
the head. The free segment is narrow distally, but much broader proximally,. 
the two portions distinguished by a marked constriction of the inner margin. 
Pereiopod 1, subchelate, propod with proximal tooth defining the palm 
which is only slightly oblique. There are two rows of setae on the inner 
side of the propod parallel to the palm, and one row on the outer si do ""he 
