1452 



Pearse, A. S. 1949. 



Observations on flatworms and nemerteans collected at Beaufort, N.C. Proc. 

 U.S. Natl. Mus. 100(3255): 25-38. 



Venus mereenaria was often infested with Malaoobdella grossa, Order 

 Bdellonemertea, Class Nemertea. On June 1, eight hosts yielded three; on 

 June 17, nine hosts six (three in one host); and on July 25, five hosts one; 

 an average of 0.45/host. - J.L.M. 



1453 



Pearse, A. S., H. J. Humm, and G. W. Wharton. 1942. 



Ecology of sand beaches at Beaufort, N.C. Ecol. Monogr. 12(2): 135-190. 



Venus mereenaria was quite common on mud and sand flats on Bird, Sheepshead, 

 and Guthrie Shoals and also on the beach inside Fort Macon. The species is 

 mentioned in several places in the text in connection with resistance to 

 wave action, digging and depth of burrowing, length of siphons, feeding, 

 predation by birds, and breeding, but these are general observations and not 

 new contributions to knowledge. - J.L.M. and M.W.S. 



1454 



Penn, Edwin (Erwin ?) S. 1974. 



Price spreads and cost analyses for finfish and shellfish products at 

 different marketing levels. NOAA Tech. Rept. NMFS SSRF 676, 74 p. 



The paper does not mention hard clam specifically, but the data and con- 

 clusions would apply generally to this species. The margin between selling 

 and purchasing prices for each of 13 fishery products and the share of the 

 consumer's dollar by each level and each cost component are calculated. 

 Costs and profits are analyzed by each marketing function and major 

 influences on margin differences are described. The study was made to 

 provide a guide to fish firms to determine whether there was room for 

 improvement in performance. - modified author's abstract - J.L.M. 



1455 



Percy, George. 1973. 



A preliminary review of evidence for prehistoric Indian use of animals in 

 northwest Florida. 25th Ann. Meeting, Fla . Anthrop. Soc . , unpub. rep. 

 distrib. at meeting, 51 p. 



According to Cake (1977), abstracted elsewhere in this bibliography, Percy 

 reported larval cestodes of the genus Tylocephalum in Mereenaria (Venus) 

 eampeehiensis and M. (Venus) mereenaria texana. - J.L.M. 



1456 



Perkins, E. J. 1974. 



Tne Biology of Estuaries and Coastal Waters. Academic Press Inc. (London) 

 Ltd., ix + 678 p. 



Mereenaria mereenaria is referred to occasionally throughout the work. The 

 work deals primarily with British estuaries, but references are given fre- 

 quently to other parts of the world. - J.L.M. 



406 



