298 
Transactions of the Society. 
inserted within it. Mandibles long and thin, with fine chelae similar 
in both sexes. 
With exca- 
vations of 
the ventral 
surface for 
the recep- 
tion of 
the legs. 
s 
Body regular in form. Dorsum 
regularly vaulted or arched, 
and without sculpture ex- 
^ cept pitting or areolation . . 
First pair of legs with ambu-'l 
lacra (claws and caruncles) / 
First pair of legs without am-l 
bulacra J 
Body irregular in form ; dorsum not regularly vaulted or 
arched, but sculptured 
Uropoda. 
Cilliba 
(Discopoma). 
Glyphopsis. 
r Body of adult protected by fused dorsal and ventral plates . . Dinychus. 
Without 
such exca- 
vations 
r Adult without ventral plate except the geni- 
tal operculum (epigynium) 
Dorsal and ven- 
tral plates noli 
k. fused 
Dorsal and ven- 
tral plates con- 
^ spicuous 
r Genital plate 
of female 
distinct from 
the sternal 
First legs j 
with am- > 
bulacra .. J 
First 
without , 
ambulacra J 
Uroseius. 
Trachytes. 
Polyaspis. 
Genital plate of female"! 
^ fused with the sternal . . J 
Uropodella. 
Descriptions of New Species. 
TJropoda hamulifera sp. n., plate VI. figs. 5-7. 
? s 
Length about *71 mm. -68 mm. 
Greatest breadth about .. .. *60 „ *58 „ 
Length of legs, 1st pair, about *26 *25 „ 
„ 2nd and 3rd pairs, about ., *29 „ *28 „ 
„ 4th pair, about *35 ,, ’34 „ 
The striking characteristic of this species consists in the hooked 
hairs on the dorsal surface. There is hardly any sexual dimorphism, 
except that the female is a trifle the larger and of course the difference 
of the genital plates. 
Colour rather pale yellow-brown. 
Texture chitinous, dull, without any polish. 
Shape nearly elliptical, a trifle wider posteriorly than anteriorly ; 
very round posteriorly. The anterior portion projects a little, forming 
a short, broad, truncated trigon ; the anterior (truncated) edge of this 
trigon is quite straight, and measures about 0 * 09 mm. There is also 
a very slight, wide, lateral projection of the periphery commencing at 
the base of the trigon. The whole margin is broken and irregular. 
Dorsal Surface. — This may be considered as divided into two 
areas, a central slightly-domed space and a flatter, but not really flat, 
margin. The central space is strongly areolated, areolations about 
