On some Indian Phyllopoda. 15 



Description of the (young) female. 



The specimen, from which fig-ures 9, 10 and 11 on 

 PI. II were drawn, is an ovigerous female apparently belong- 

 ing to the present species, though it was taken in a different 

 locality, and is of far inferior size to the above-described 

 male. It is now fully proved, however, that the Phyllopoda 

 reach maturity long before they have attained their full 

 size, and as the specimen under question, apart from the 

 usual sexual differences, agrees on the whole rather well 

 with the male specimen, there is no reason for separating it 

 specifically. 



The shell measures only 5 mm. in length and 3 mm. in 

 height, and is accordingly scarcely more than half as large 

 as that of the above-described male specimen. It is of a 

 pale yellow colour and rather pellucid, with the surface less 

 glossy than in the male. 



Seen laterally (fig. 9), it appears on the whole shorter 

 in proportion to the height, with the free edges of the valves 

 more regularly curved. The dorsal margin, as in the male, 

 is perfectly straight, and terminates both in front and behind 

 in a well-marked angular corner. The lines of growth are 

 much fewer in number than in the above-described male, 

 only 12 — ^14 being counted on each valve; but this may 

 easily be accounted for by the apparently young age of the 

 individual. The lines, however, are quite as prominent as in 

 the male, and are also pretty regularly arranged. The surface of 

 the shell between them exhibits a faint and somewhat irre- 

 gular reticulation. The free edges of the valves are mi- 

 nutely hairy throughout the greater part of their length. 



The enclosed animal, on the whole, agrees in structure 

 with that of the above-described male, exhibiting, however, 



