52 A-REVISION OF THE ASTACID At. 
spines acute. Carapace laterally compressed, punctate, fore border shehtly 
angulated behind the antenne ; cervical groove sinuate ; no lateral spine ; 
small branchiostegian spine ; areola of moderate width, punctate. | Abdo- 
men longer than the cephalothorax ; anterior segment of telson with two to 
five spines on each side. Epistoma very short, broad, with an anterior spine. 
Antennx long, slender; scale very broad, broadest in the middle, with very 
small apical spine. Third maxillipeds hairy within. Chela sub-cylindrical, 
long, slender, densely covered with ciliate, squamous, small tubercles; fingers 
slender, with an internal and external longitudinal rib. Carpus cylindroidal, 
hardly furrowed above, squamoso-tuberculate like the hand, one or more of 
the tubercles on the inner margin spiniform. Meros granulate, with spines 
on the lower surface and at the distal end of superior border. Sternum 
lanuginose. ‘Third pair of legs with a long, slender hook on the third joint. 
First pair of abdominal appendages short, thick, outer part ending in a blunt 
tubercle, bearmg a minute horny tooth directed forwards ; the internal part 
projects far beyond the hind border of the external part, terminating in a 
slender outwardly directed spine; within, it forms a broad, flat, setose plate ; 
the anterior margin of the appendage has a projecting rectangular shoulder 
near the tip. 
The second form cf the male has the hooks on the third legs short and 
blunt; the external part of the first abdominal appendages has a terminal 
blunt tubercle in place of the sharp horny tooth of the first form, 
The female has shorter, broader, smoother hands; annulus composed of a 
large anterior bilobed tubercle and a smaller posterior tubercle. In a large 
number of the females examined the annulus is hardly at all developed. 
Length, 56 mm. 
Habitat. — Cuba. 
Erichson does not describe the male appendages, but Von Martens as- 
serts that in Krichson’s types in the Berlin Museum these organs have the 
same structure as in those described by himself as C. Cubensis from Gund- 
lach’s Cuban collections: “ Die ersten Abdominalfiisse sind eigenthiimlich 
gebildet ; obwohl nur aus einem Stiick bestehend, lassen sich doch gegen ihr 
Ende zu zwei mit einander verwachsene Theile unterscheiden, ein dusserer, 
der in eine stumpfe Spitze endigt und dessen Vorderrand nahe derselben 
merklich anschwillt, und ein innerer, welcher nach hinten den vorigen iiber- 
ragt, nach innen eine ebene ovale Flache bildet, welche sich an die des 
Anhangs der vordern Seite anlegt, und an seinem Ende zwei Lappen zeigt, 
