Mr. A.G. Butler on the Agaristide. 135 
upper surface is beset with minute rough tubercles. No distinct 
eyes are present ; at the base of the peduncle of the inner an- 
tenne, on each side, one perceives simply a small roundish 
black speck as the indication of an organ of vision. ‘The 
peduncles of the antennz are tolerably hairy, the internal 
spine of the peduncle of the inner antennz longer than the 
peduncle itself. The anterior legs are very long, and when 
laid backwards reach beyond the caudal swimmeret: their 
several joints much compressed, the brachium 7:5, the ante- 
brachium 3°5, the carpus 4, the dactyli 5 lines long; the 
brachium and antebrachium beset with one or two small spines 
on their outer margins ; the hand is likewise provided on its 
upper and lower margins with some very fine teeth. The 
succeeding pairs of legs appear considerably shorter ; the hand, 
particularly of the third and fourth pairs of legs, almost pris- 
matic, quadrangular; the finger slender, slightly hairy ; the 
terminal joint of the fifth pair much shorter than the conical 
tarsus ; the coxa provided on its inner side with two roundish 
projecting scales, behind which lie the orifices of the male 
genital organs. The first abdominal segment is flat on its 
upper surface, the four succeeding furnished with a well- 
marked salient sharp median ridge, which is prolonged at the 
end of each segment into an acute anteriorly hamate and 
incurved spine; this spine is most highly developed on the 
fourth segment. The median ridge is but little indicated on 
the sixth segment, and bifurcates anteriorly. The pointed 
triangular median plate of the caudal swimmeret roughly 
granulated at the base, provided with two ridges converging 
towards the tip on the hinder half. The plates of the swim- 
meret are all strongly ciliated on their margins. Length of 
the body 2 inches. 
A single male specimen of this interesting species, found in 
the Mediterranean near Sicily, exists in the Zoological Museum 
at Vienna. 
X VIII.—Notes on certain Genera of Agaristidee, with Descrip- 
tions of new Species. By ARTHUR GARDINER BUTLER, 
ABV Ta. Easy CEC. 
(Plate XIII. ] 
Tue following notes I have made during my rearrangement 
of the Agaristide in the collection of the British Museum. 
The genera Hespagarista and Damias (part.), placed by Mr. 
Walker among the Castnii, are referable to the present family, 
