340 Records of the Indian Museum. [Vor. VIT, 
The Ist antennae comprise 21 joints, the 7th and 8th seg- 
ments being completely and the roth and 11th partially fused. 
When fully extended they reach nearly to the end of the abdo- 
men. ‘The proportional lengths of the joints are as follows :— 
Segments— 
I. 2. 3.4. 5. 6. 7-8. Q. IO-Il, 12. 13. 14. 15. 16. 17. Wiss Wp AOs Bil, BA, 25} 
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The distal part of segment 2 and segments 3 to 14 are fringed 
posteriorly with long hair. 
The 2nd antenna, mandible and maxillae are of the usual type. 
The maxilliped resembles that of other members of the genus, 
but is armed with a row of fine teeth down the margin of the 2nd 
basal joint. 
The ist pair of legs is as figured. All the segments of the 
exopodite are fringed with fine hair and the terminal saw is long 
and siender, being over 14 times the length of the last segment. 
The 5th pair of legs very closely resembles those of the preced- 
ing stage as described by Giesbrecht. In both cases there is no 
endopodite present; it differs, however, in having five spines on the 
margin of the exopodite instead of four. As we shall see later 
this increase in the number of spines appears to be connected with 
the progressive stages of development, the young immature forms 
only having three spines present. 
¢ Total length 2°43 mm. 
The general structure of the cephalo-thorax is the same as in 
the female, but the cephalic groove, described above, appears to be 
usually somewhat better marked. The rostrum resembles that of 
the female and has no lenses. A well-developed ventral lens is 
present. 
The abdomen consists of 5 segments, of which the 5th is very 
small. The furcal rami are symmetrical, as in the female, and the 
proportional lengths of segments and furca are 5:6:6:4:1:6. 
The left 1st antenna resembles that of the female, the propor- 
tional lengths of the joints being as follows :— 
Segments— 
The right 1st antenna, as usual, forms a grasping organ, and 
the exact determination of the limits of the various segments in 
the proximal portion is a matter of considerable difficulty ; as re- 
gards the distal segments the knee-joint is situated between seg- 
ments 18 and 19 and the roth to 21st segments are fused together. 
The proportional lengths of the last 9 joints are as follows :— 
14. 15. 16. 17. 18, 19-21. 22. 23. 24. 
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The 17th segment bears a prominent crest, which terminates 
distally in a sharp point; the 18th segment is armed with a 
toothed-plate, which is not produced proximally as in the earlier 
