52 A REVISION OF THE ASTACID.E. 



spines acute. Carapace laterally compressed, punctate, fore border slightly 

 .in o-ula ted behind the antenna? ; 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. 

 Antennse 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, bearing 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 of 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. 



Halilal. Cuba. 



Krichson does not describe the male appendages, but Von Martens as- 

 serts that in Erichson's types in the Berlin Museum these organs have the 

 same structure as in those described by himself as C. Citbensis from Gund- 

 lach's Ciilian collections: "Die ersten Abdominalfusse sind eigenthiimlich 

 gcliildrl ; oliwohl nur aus cinem Stuck bestehend, lassen sich doch gegen ihr 

 Km Ir /,u y.\vei mit einauder verwachsene Theile unterscheiden, ein ausserer, 

 iler in eine stumpfe Spitze endigt und dessen Vorderrand nahe derselben 

 inerklich auschwillt, und ein inuerer, welrher nach hinten den vorigen iiber- 

 ragt. nach innen eine ebene ovale FTaehe bildet, welche sich an die des 

 Aiihaiigs dei- vordern Seite anlegt, und an seinem Ende zwei Lappen zeigt, 



