1908] -— Decapod Orustaceans. 23 
and submit the following description for comparison with Borra- 
DAILE'S definitions of the various Åxius genera. 
Fam. Azxiidae: sub-genus Cabcarides: Carapace dorsally some- 
what flattened in the anterior third and terminatimg mm a slightliy 
ascending acute rostrum [with fine spimulesj. On the anterior por- 
tion of the carapace [m front of the cervical groove] å median and 
two lateral carimae [with spimes] amd in addition om either side of 
the median carma, between it and the lateral carmae, å row of 
spinulesJ. None of the carinae extend entirely back to the cervical 
groove. Cervical groove well defined. The carapace posterior to the 
cervical groove is smooth, round, without any raised median or other 
carima.  Hyes without pigment. Stylocerite and scaphocerite om the 
peduncle of the 2nd antennae of medium length. nd pair of per- 
eiopods furnished with chelae. [1 arthrobranchia and 1 very slightly 
developed podobranchia on the 2nd maxilliped: no pleurobranchiaef.*) 
Ist pair of pleopods simple, without branches. 6th pair of pleopods 
with å distinet suture om exopodite. 
C. crassipes Tryp. Definition: Chela on the right Ist pereiopod 
about the length of the carapace (measured along 
the median line, rostrum not meluded). Digitus 
very much curved. 
C. coronatus Try». Definition: Chela om the right Ist pereiopod 
a little more than half the length of the cara- 
pace (rostrum included). Digitus only slightly 
curved.  Chela generally speaking considerably 
weaker than im the preceding. 
1) This refers to OC. crassipes. I have had no opportunity of verifying 
this in the case of UC. coronatus, and Trysom has not mentioned the branchiae. 
