ON THE BRACHYUROUS DECAPODS OF THE CAPE. 59 
Stirps. CANCRINA, or ArcuEep Crass. 
Families, 
a lacinia of third maxille dilated at the apex. Shell 
(eee, SL, arched in front. 
Aberrant Groupe. 
Outer lacinia of third maxille narrow at the apex. Shell 
Canceri#, M. E. < 2 Cancrip, M‘L, 3 
, ‘ arched in front. 
Hind feet with claws. Body | 
thick. SE ML Outer lacinia of third maxille narrow at the apex. Shell 
L apa as quadrilateral, or at least but little arched in front. 
Normal Groupe. AP. ML Outer lacinia of third maxille with the inner apex emar- 
Portusta MoE ears at ; ginate. Last joint of hind feet more or less round. 
,M. E. 
Hind feet dilated, and formed Outer lacinia of third maxille with the inner apex entire. 
for swimming. Body de- | 5 Carcrinip&, Leach. Last joint of the hind feet more or less acuminate at the 
pressed, apex. 
I proceed to enumerate the following Cape species, which belong to this Stirps :— 
Fam. XANTHIDA, Mihi. 
Sub-genus. AvERGAtIS, Dehaan. 
) Atergatis compressipes, 7. s. 

Se. 6. ( 
Descr. Atergatis testa rubra levi fulvo-maculatd clypeo vix quadrilobo; chelis intus com- 
pressis, digitis supra carinatis extus lineis elevatis duabus instructis, pedibus brevibus latis 
compressis fulvé-maculatis. 
Norr. The shell of this crab is about two inches long, and about twice as wide as long, of an 
oval form, very convex, and having only the branchial regions distinctly marked. The surface is 
quite smooth, of a dirty orange hue, marked with brick-red spots. Of these, one large spot, of 
an irregular form, reaches over the genital region almost the whole width of the shell. Another 
smaller spot marks the cardiac region, and the remainder of the shell is covered with small 
round spots of the same hue, which are also found on the feet. The seven-joited abdomen of 
the female is also marked with small fulvous spots. 
The margin of the clypeus is sinuated so as almost to show four rudimentary lobes. The 
chele at their points are blackish ; on the fixed joint there are two elevated lines on the out- 
side. The other feet are very much compressed and dilated. In other respects the characters 
are those common to all the species of the groupe named Atergatis by Professor Dehaan. 
This species is two inches long. 
Sub-genus. Cutoropivs, Leach. 
Se. 7. ( ) Chlorodius perlatus, 7. s. 
Descr. Chlorodius testa rugis divisd, supra granulosa granulis albis, marginibus lateralibus 
anticis quadrilobis ; clypeo quadrilobo manibus pedibusque crassis rugosis verrucosis, chelis 
apice translucentibus, pedibus brevissimis. 

Nors. This species comes very near the Chlorodius areolatus of Milne Edwards, but may be 
12 
