1472 



Pietsch, Helen G., and Reuben M. Cares. 1964. 



Histologic technique for larvae of bivalve molluscs. Turtox News 42(9): 

 234-235. 



Describes a technique for paraffin embedding, microtome sectioning, and 

 staining of lamellibranch larvae for studying infectious bacterial necrosis 

 in hard clam and other species. Refers to a paper on the pathogen by 

 Tubiash and Chanley (1963) , abstracted elsewhere in this bibliography, and 

 a manuscript by Cares and Tubiash on histopathology of bacillary necrosis of 

 larval M. meraenaria^ to be published in a journal not identified. We have 

 been unable to locate this second paper. - J.L.M. 



1473 



Pilgrim, R. L. 



C. 1954. 



The action of acetylcholine on the hearts of lamellibranch molluscs. J. 

 Physiol. 125(1): 208-214. 



Some mechanism exists , intimately linked wi 

 system of the lamellibranch ventricle, whic 

 (ACh) . Results to date did not show overal 

 attempt apparently had been made to draw th 

 results of studies on 8 New Zealand lamelli 

 meraenaria and Gryphaea angulata for compar 

 of the drug in producing reduction in ampli 

 reduced frequency varied between species 

 comparable to Venus in their high sensitivi 

 suitable for bioassay. - J.L.M. 



th the rhythmically contractile 

 h is influenced by acetylcholine 

 1 behavioral patterns, and no 

 em together. The author reports 

 branchs, with data on Venus 

 ison. Effective concentration 

 tude or systolic arrest or 

 Dosinia and Amphidesma were 

 ty, and should be equally 



1474 



Pluhowski, Edward J. 



1970. 



Urbanization and its effect on the temperature of the streams on Long Island, 

 New York. U.S. Geol. Surv. , Prof. Pap. 627-D: 1-60. 



Human modifications of the natural environment have increased average stream 

 temp in summer by as much as 5° to 8°C. Winter stream temp in man-affected 

 reaches of the streams averaged about 1.5° to 3°C lower than in unaffected 

 reaches. Mercenavia meraenaria is not mentioned, but it is possible that 

 these alterations might affect the ecology of coastal bays into which these 

 streams empty, and in some of which M. meraenaria is abundant. - J.L.M. and 

 M.W.S. 



1475 



Poillon, C, and L. Clarke. 1965. 



Report on critical needs of the commercial fishing industry of Long Island, 

 New York. L.I. Fisherman's (sic) Assn., Atl . Process. Co., Westhampton 

 Beach, N.Y. (unpub) . 



Could not locate. Search terminated. - J.L.M. 



1476 



Pollard, J. F. 1973. 



Experiments to re-establish historical oyster seed grounds and to control 

 the southern oyster drill. La. Wild Life Fish. Coram. , Tech. Bull. 6, 32 p. 



Meraenaria (Venus) meraenaria is not mentioned. - J.L.M. 



412 



