NO. 3574 COPEPOD CRUSTACEANS — LEWIS 181 



Measurements. — (In mm) 1 female and 1 male: 



Total length, excluding lateral 



posterior processes but female 



including median projection 9.08 

 Length of ceiihalothorax, anterior 



to maxillae 4.70 

 Width of anterior region of 



cephalothorax 0.86 



Length from maxillae to trunk 0.78 

 Width of posterior region of 



cephalothorax (at maxilla) 0.99 



Length of trunk 3.07 



Width of trunk l.GO 



Lengtli of median posterior process 1.11 



Length of dorsal posterior processes 0.52 



Length of ventral posterior processes 0.58 



Length of egg string 2.48 



Total length, excluding posterior male 



processes 3.44 



Length of prosome 1.08 



Width of prosome 0.90 



Length of urosome 2.25 



Width of urosome 0.81 

 Width at constriction between prosome 



and urosome 0.77 



Description of female. — Body (fig. 68a) 2-parted, anterior part 

 consisting of cephalothorax, posterior of trunk. Cephalothorax elon- 

 gate, at sharp angle to longitudinal axis of trunk, consisting of cepha- 

 lon and maxilliped-bearing segment; anterior third with heavily 

 sclerotized tergum. Trunk, excluding posterior processes, approx- 

 imately three-fourths the length of cephalothorax, separable from 

 cephalothorax by distinct groove on lateral and ventral surfaces, 

 groove not as distinct dorsally. Trunk flattened dorsoventrally, 

 basically rectangular from dorsal viewpoint although with numerous 

 small irregularities. Posterior end (fig. 68c) with 2 pairs of short, 

 knoblike processes laterally, with rounded projection on ventral 

 median surface. 



Antennules, antennae, maxillules, maxillae, and maxillipeds covered 

 with thick layer of cuticular material, material overlying thin, darker 

 inner layer. Segment division of mentioned appendages not ex- 

 tending through outer layer although usually discernible and distinct 

 in inner layer. 



Antennule (fig. 68e) 3-segmented, situated on ventral anterior sm'- 

 face of cephalothorax. First segment large, irregular, approximately 

 1 Yi times the combined lengths of second and third segments. Second 



