126 STALK-EYED CRUSTACEA. 



In W. lq)tod(icf>/la the ai-mature, as given by Spence 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 W. immata, are but rudimentary, 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. leptoducUjla. The spine on the anterior margin of the 

 carapace at the internal orbital angle is smaller than in TF. leptodactyla. If 

 the figure of W. Icptodactyla 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 pleurte of the second abdominal somite. In TF. inornata the 

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

 gular depression on either side there is a raised crescentic figure with its 

 concavity turned outward. The horizontal axis of the second abdominal 

 pleura) is much longer in proportion to their vertical axis than it is in TF. lepto- 

 dadjjla and these pleurae are much narrower and more produced anteriorly. 

 In TF. 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. 



1 male, 1 fem. ovig. 



2 males, 4 fem. (1 ovig.). 

 2 males, 1 fem. 

 1 fem. 



As in TF. lejdodactyla, the posterior thoracic appendages are perfectly chelate 

 in both sexes. 



The branchial formula is as follows : — 



Somites ~ viii. ix. x. xi. xir. xiii. xiv. 



Pleurobranchise 00 1 1 1 1=4 



17+ (5) 



The gills and epipods in general are large and well developed, the 

 epipods equalling the podobranchia) in length. The third maxilliped can-ies 

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



