SURFACE COPEPODA OF THE GULF OF MANNAK. 207 



The First Pair of Legs. — Basal 1 bears a single seta on its 

 inner border, and is devoid of any spines either on its surfaces 

 or the external margin. 



Basal 2 bears the usual S-shaped seta on its distal inner 

 border, and is likewise devoid of spines. 



Exopod 1 bears a single inner seta and has no marginal 

 spine. 



Exopod 2 has a single inner seta and bears a short transverse 

 row of needle-like spines on the outer margin. 



Exopod 3 has four iimer setse : the usual two marginal 

 spines are present, and in addition there is a row of three or 

 four teeth on the proximal part of the outer border. The 

 end spine is long and slender, being nearly as long as the whole 

 exopodite. 



The endopodite is two-jointed, and reaches to the level of 

 the joint between exopuds 2 and 3. 



The Second Pair of Legs. — Basal 1 bears a single inner seta 

 and no spines. 



Basal 2 has no spines or setse. 



Exopod 1 has a well-developed marginal spine, and bears in 

 addition a transverse row of sharp spinules on its outei" and 

 posterior aspect. There is a single inner seta. 



Exopod 2 bears a marginal spine, and in addition has a row 

 of six curved claw-like spinules on its outer margin, and tlu-ee 

 triangular spines on its anterior surface. A single seta is 

 present on the inner margin. 



Exopod 3 bears two marginal spines and a row of spinules 

 on that part of the outer margin proximal to the fii'st spine. 

 Five setoe arise from the inner border. The terminal spine is 

 a trifle longer than the last segment, in the proportions 9 : 8. 



Endopod 1 is small, and the outer border ends in a short 

 spine. A single seta is present. 



Endopod 2 bears an oblique curved row of sp mules, usually 

 five or six in number on the posterior surface, and a longi- 

 tudinal row of four or five needle like spinules on the outer 

 border, which also terminates in a small spinous process. A 

 corona of small spinules is situated on the anterior aspect near 

 the distal margin. A pair of setse are present on the inner 

 border. 



