IQ22.] 



S. Kemp : Notes on Crustacea Decapoda. 



241 



termination of a sharp carina which commences in the posterior 

 quarter of the carapace. 



The lower limit of the orbit is defined by an acute angula- 

 tion of the frontal margin. The supra-orbital spine is absent. 

 The antennal spine is large, with the hepatic placed behind it on 

 the same level ; both spines are supported by strong carinae. The 

 surface of the carapace is uneven ; a blunt ridge runs backwards 

 from the lower orbital angle and is separated from the antennal 

 and hepatic spines by a well-marked furrow. There is a similar 

 furrow above this ridge and a large shallow depression on the gastric 



&. 



b. 



Text-fig. 76.- 



Antennule. 

 Antennal scale. 



■Dasycaris symbiotes, sp. nov. 



c. Third maxilliped. 



d. Fingers of second peraeopod. 



region. The upper limit of the branchial cavity is defined externally 

 by a groove and an irregular fold. 



The eyes are rather slender. The cornea is hemispherical and 

 scarcely wider than the stalk and there is no trace of the ocular 

 spot. 



The basal segment of the antennular peduncle (text-fig. 76a) 

 is externally concave and is remarkably narrow in its distal third ; 

 its least breadth is only one quarter its length excluding the terminal 

 spine. The lateral process does not reach the middle of the basal 

 segment and consists of a comparatively broad plate with an acute 

 termination ; it thus differs considerably from that of Periclimenes 

 in which the whole process has the form of a simple spine. The 



