Bathypelagic Sampler 
The Bathypelagic Sampler (BPS) is 
essentially a larger version of the MPS. It 
has a 1 m x 1 m square freme with a single, one- 
meter net and is made to sample the 500-1000 m 
depth zone. Both the MPS and BPS have flow- 
meters that can record the amount of water 
filtered by each net tow. 
The principle of the present samplers may 
be modified to suit the specific needs of other 
investigators, particularly with respect to 
size of frame opening, number of nets and depth 
ranges to be sampled. Larger frames and more 
nets, for instance, are recommended for 
sampling the abyssopelagic realn. 
REFERENCES 
1. Hardy, A.C.(1926), "The herring in relation 
to its animate environment. Part II: 
Report on trials with the plankton indica- 
tor". MAFF, Fish. Invest., Ser. 2, 8(7): 
1-13. 
2. Gehringer, J.W.(1952), "An all-metal 
plankton sampler (Model Gulf III)". U.S. 
Fish and Wildl. Serv., Spee. Sci. Rep. 
Fish., No. 88: 7-12, 
3. Glover, R.S.(1953), "The Hardy plankton 
indicator and sampler: a description of 
the various models in use". Bull. Mar. 
Ecol., 4(26): 7-20. 
4. Ablstrom, E.H.(1958), "High-speed plankton 
sampler". U.S. Fish and Wildl. Serv., 
Fish. Bull., 58 (132): 187-214. 
5. Mpotoda, S.(1953), "New plankton samplers". 
Bull. Fac. Fish., Hokkaido Univ., 3 (3): 
181-86. 
6. Motoda, S.(1959), "Devices of simple 
plankton apparatus". Mem. Fac. Fish., 
Hokkaido Univ. 7 (1/2): 73-94. 
7. Be, A.W.H., & Ewing, M., & Linton, L.W., 
(1959), "A quantitative mltiple opening 
and closing plankton sampler for vertical 
towing". J. du Cons. int. Explor. Mr, 
25: 36-46. 
ACINOWLEDGMENT 
The present samplers were constructed by 
S.M. Harrison at the Lamont Geological 
Observatory and were successfully field 
tested on board the Observatory's research 
vessel VEMA during July and August 1961. 
Financial support was given by the National 
Science Foundation (NSF G-9557 and G-11593) 
ae Office of Naval Research (Nonr 266 
(48)). 
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