1922. j 



S. Kemp : Notes on Crustacea Decapoda. 



I5i 



of the outer antennular flagellura is composed of three or four 

 segments and is about two-thirds the length of the free portion 

 of the shorter ramus. The antennal scale (text-fig. 186) is rather 

 more than 3 times as long as wide (in an adult female) ; its outer 

 margin is slightly concave and terminates in a spine which reaches 

 as far forwards as the lamella. 



The third maxilliped bears an arthrobranch ; the ultimate 

 segment is considerably shorter than the antepenultimate. The 

 first peraeopod reaches beyond the scale by the length of the 

 fingers. The carpus is much shorter than the merus and slightly 

 shorter than the chela. The fingers are unarmed and about two- 

 thirds the length of the palm. 



The second peraeopods are equal or subequal and reach beyond 



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s 



Text-fig. 18. — Periclimenes latipollex, sp. nov. 



Antennule. c. Last two segments of third peraeopod. 



Antennal scale. d. Dactylus of third peraeopod. 



the scale b}' the whole length of the chela. Both merus and car- 

 pus are unarmed. The merus is nearly twice the length of the 

 ischium; the carpus is conical, about 15 times as long as broad 

 and scarcely one-fifth the length of the chela. The chela is as 

 long as the three preceding segments combined and much exceeds 

 the carapace-length; the palm is from 22 to 27 times the length 

 of the dactylus and is from 4*5 to 5 times as long as broad. The 

 fixed finger has a cutting edge armed in its proximal half with three 

 small teeth and on the dactylus there is a cutting edge with a 

 single basal tooth. When the claw is closed the cutting edges do 

 not coincide but slide past each other like the blades of a pair of 

 scissors, the single tooth on the dactylus fitting into a recess in the 

 fixed finger. The tip of each finger is provided with an inturned 



