1912.] R. B.SEyMouR-SEWELL: Surface-Living Copepoda. 359 
3rd joint of the exopodite and the coarse teeth on the proximal 
part gradually diminished in size and finally blended with the 
finer denticulations on the distal part of the margin, forming a 
continuous series. 
2. Acrocalanus longicornis, Giesbrecht, var. plumulosus, nov. 
A single specimen was obtained from locality G, which showed 
a slight form of variation of this type, the 2nd seta of the left 
furcal appendage showing a single dichotomous branching. 
3. Acrocalanus gardineri, Wolfenden. 
A. gavdinert, Wolfenden, Notes on the Collection of Cope- 
poda. The Fauna and Geography of the Maldive and 
Laccadive Archipelagoes, vol. ii, p. 1004, pl. xcvii, figs. 5, 
10, 14-21. 
Occurrence: Lecalities M, N, Q. 
Examples of this species were rare. Those that were obtained 
weie all males and tallied with Wolfenden’s description, with 
the exception that the 2nd basal segment of the 5th leg was in 
all cases much shorter than the Ist, not longer, as he describes it. 
4. Acrocalanus gibber, Giesbrecht. 
Occurrence-T ocahities DoH, J KIN; O; P: 
This species was fairly widely distributed, and in certain 
localities, notably D, H, K, was quite common. 
5- Acrocalanus gracilis, Giesbrecht. 
Occurrence: Localities C,G, H, J, M, N. 
With the exception of localities H, N, in which it formed 
1Io—11t% of the total catch, it occurred only in comparatively 
small numbers. It was also less widely distributed than the 
preceding species. 
6. Acrocalanus monachus, Giesbrecht. 
Only a single specimen was obtained from locality G. 
Genus Calocalanus, Giesbrecht. 
I. Calocalanus pavo (Dana). 
Occurrence: Localities D, E, O 
With the exception of a single specimen found in D, all those 
obtained came from EF and O, where the species was comparatively 
common. 
