126 



STALK-EYED CRUSTACEA. 



In TF". leptodadyla the armature^ as given by Spcncc Bate, is as fol- 



lows : 



Marginal 8 



5 



18 to 23. 



Median ridge 



6 — 4. 



The marginal spines which lie behind the cervical groove, when present 

 in IF. inorwda^ are but rudimentaryj while there are no spines on the sub- 

 marginal carina or along the lateral boundaries of the cardiac area, where 

 they are present in W. Icptodadyla. The spine on the anterior margin of the 



W. 



If 



w. 



given by Bate is correct, there is an important 

 distinction between the two species in the tergum of the sixth abdominal 

 somite and in the pleura) of the second abdominal somite. In W. inornata the 

 dorsal carina of the sixth segment is double anteriorly and in the quadran- 

 gvdar depression on either side there is a raised cresccntic figure with its 

 concavity turned outward. The horizontal axis of the second abdominal 

 pleura3 is rauch longer in proportion to their vertical axis than it is in TF. leplo- 

 dactyla and these pleura) are much narrower and more produced anteriorly. 

 In FF. forceps A. M. Edw., the carapace is more inflated, closely beset 

 throughout with minute spinules, its sides more convex. 

 Station 3374. 1823 fathoms. 8 males, 6 fem. 



ii 



a 



a 



u 



3381. 1772 



. 1793 



3399. 1740 



3400. 1322 



U 



U 



u 



a 



1 male, 1 fem. ovig. 



2 males, 4 fem. (1 ovig.) 

 2 males, 1 fem. 



1 fem. 



As in W. lepjtodaolyhj the posterior thoracic appendages arc perfectly chelate 

 in both sexes. 



The branchial formula is as follows : — 



Somites viii, 



Pleurobranchise 



Arthrobranchise 

 Podobranchiae 

 Epipods 



IX, 





 1 







1 



X. 





 2 

 1 

 1 



XI. 



1 



2 

 1 

 1 



XII. 



1 



2 

 1 

 1 



XIII, XIV. 



1 



2 

 1 

 1 



1 





 

 



4 

 9 

 4 



(5) 



17+ (5) 



The gills and 



epipods in general are large and well developed, the 



epipods equalling the podobranchia) in length. The third raaxillipcd carries 

 onlj a slender epipod, and the membrane that connects this appendage with 



