362 Records of the Indian Museum. [Vor Wide 
and 23rd segments are respectively fused together. The propor- 
tional lengths are as follows :— 
. 4. 5.6. 7. 8. 9. 10. II. 12. 13. 14. 15. 16. 17. 18, 19-21. 22-23. 24. 
6. 7. 5. 8 8. 7. 10, 10, 8. 15. 17. 25. 30. 27. 35. 50. 27. 15. 
The knee-joint occurs between the 18th and r9th segments, 
and the 17th, 18th and proximal half of the 1g—2Ist segments are 
all armed with rows of delicate teeth. The 2nd, 5th and t9—21Ist 
segments all bear spines, that on the 5th being large and well- 
marked. 
The 5¢h leg is exactly similar to that of C. dorsispinatus. 
There can, I think, be no doubt that these examples, obtained 
by me in Hinzé Basin, are identical with those described by 
Cleve under the name of C. notoceras from the Arabian Sea. But 
there seems to be certain discrepancies between them and C. dorsis- 
pinatus. 
Cleve himself, after seeing Thompson and Scott’s paper, came 
to the conclusion that his examples were identical, but on com- 
paring the two descriptions certain differences are apparent and I 
have tabulated these as far as possible :— 
{ 
| 
| 
C. notocevas, Cleve, and present | C. dorsispinatus, Thompson 
specimens. and Scott. 
I Abdomen 2 3-jointed. Abdomen ¢ 4 (?) jointed (three only 
are shown in the fig., but in the text 
it is stated that four are present). 
2 | Spines on genital (1st) segment | Spines only onvleft side. 
of abdomen ¢ on both sides. | 
3 | Rostrum, bifid. Rostrum broad and triangular. 
| | 
4 | Antennal joints 1-4 fused (in | Antennal joints all separate. 
female and left male), 
5 | Well-marked spine on 5th joint | No spine present. 
right antenna 7. | (They make no mention of it in the 
text but figure it as absent). 
Were it not that Cleve himself was convinced of the identity 
of his specimens with those from Ceylon, I should have had no 
hesitation in describing my examples as representatives of C. 
notoceras and distinct from, though closely allied to, C. dorsis- 
pinatus. Under these circumstances, however, I have left the 
matter open. 
3. Centropages orsinii, Giesbrecht. 
Occurrence: sLocalities BCD; EG, Hy MENON, 
This species was quite common, especially in localities G 
and H. 
