148 Records of the Indtun Museum [Vor. XI, 
is fringed with short setae. Thoracic appendages (fig. 8) stout 
and comparatively short, first joints almost equal in length to the 
next three, stout claw with lateral spines; the 3rd, 4th and 5th 
joints have on their inner side a dense mass of long setae, with 
paired stouter spines on the outer side of the 2nd, 3rd, and 4th 
and on the inner side of the 5th joints. Uropoda (fig. 9) extending 
beyond the telson; basal plate sparsely covered with setae, there 
is ashort, blunt spine on the outer side and a raised portion 
extending across the proximal end to the inner side, beneath which 
the endopodite articulates ; exopodite somewhat conical in shape, 
more globose on the inner side, endopodite slender, terminating 
in two long setae. Telson (fig. 10) triangular, flat, sides straight, 
apex sub-acute. Length t1°5 mm. Colour (in alcohol) greenish- 
brown with. yellow flecks on the head and mesosomatic segments. 
Habitat.—Under stones at edge of lake, Barkul, Lake Chilka, 
Orissa, 22-vii-13, No. 8670/10. ‘* Apparently an amphibious 
species’’. (NV. Annandale.) 
Type.—In the collection of the Indian Museum, 
The genus Arhina was constituted by Budde-I,und (Rev. 
Crust. Isop. Terr., 1904, p. 44) for a species, A. forcelliordes, found 
‘in a warehouse at Copenhagen, perhaps imported from East 
India.” The genus is placed by Budde-Lund under the sub-family 
Spherillioninae, which includes Pseudophiloscia, Suarezta, Sclerop- 
actes, Sunniva, Saidjahus, Ambounia and Shherillo. Neither 
Pseudophiloscia or Arhina are closely related to any of the above 
mentioned genera, and whilst I differ strongly from Budde-Lund in 
his views on classification, they would, in my opinion, have found a 
more natural position in his Tribe Alloniscoidea, (of. cit., p. 37). 
The form of the antennae, Ist maxillae, maxillipedes and 
uropoda clearly indicate the relationship of this species to Arhina 
porcelliotdes. 
Periscyphis gigas, n. sp. 
(Plate ix, figs. I-10.) 
Body (fig. 1) oblong oval, dorsal face strongly convex, sloping 
downwards posteriorly, almost smooth. Cephalon (figs. 2 and 3) 
small with median depression, flanked laterally by the lateral 
plates of the Ist segment of the mesosome, the anterior border of 
which extends slightly beyond the cephalon ; lateral lobes well 
developed, median lobe absent. Ventrally there is a strong median 
carination. Eyes prominent, sub-dorsal. Antennulae (fig. 4) 
short and stout, 3-jointed. Mandibles (fig. 5), the outer cutting 
edge has three blunt teeth and a blunt process on the inner edge, 
beneath which is a tuft of setae. First maxillae (fig. 6), the outer 
lobe terminates in four curved spines and five finer and straighter 
ones on the inner side. Second maxillae (fig. 7) thin and plate-like ; 
the inner lobe terminates in a mass of setae, whilst the outer lobe 
is more robust and tooth-like. ‘Tle segments of the mesosome 
are strongly convex, excepting those of the 1st the lateral 
plates are only slightly produced backwards. Maxillipedes (fig. 
