From 1948 to 1956, numerous blue crabs 

 were caught in Maine waters, north of their 

 usual range. No records during 1957-59. 

 During period of occurrence water tem- 

 peratures were warmer than usual. Migrated 

 from southern Massachusetts. 



Scattergood, Leslie W., Parker S. Trefethen, and 



Gareth W. Coffin. 



1951. Notes on Gulf of Maine fishes in 1949. 

 Copeia, 1951, No. 4, p. 297-298. 



Records in the Gulf of Maine of two blue 

 crabs and various fish species which usually 

 prefer the warmer waters south of Cape 

 Cod. Probably due to unusually warm 

 waters in the Gulf during the summer of 

 1949. 



Schallek,W. 



1945. Action of potassium on bound ace- 

 tylcholine in lobster nerve cord. Journal of 

 Cellular and Comparative Physiology, vol. 26, 

 p. 15-24. 



Acetylcholine content of blue-crab ganglia. 



Schone, Hermann. 



1968. Agonistic and sexual display in aquatic 

 and semi-terrestrial brachyuran crabs. Ameri- 

 can Zoologist, vol. 8, No. 3, p. 641-654. 



Review of literature and author's observa- 

 tions on 26 genera. C. sapidus was grouped 

 with those crabs characterized by the 

 female carried by the male for some time 

 before copulation. It is not known if the 

 male recognizes the receptive female by 

 means of tactile or chemical stimuli. 



Schwartz, Frank J. 



1960. Bibliography of Maryland fisheries. 



Chesapeake Biological Laboratory, Solomons, 



Md., Contribution No. 144, 35 p. 



Includes 82 references (anatomy, biology, 

 fishery, industry, and others) to the blue 

 crab. Subject index. 



Scrocco, Virginia M., and John Fabianek. 



1969. Symbiosis of Callinectes sapidus Rath- 

 bun with Carcinonemertes, bryozoans, and 

 barnacles. Federation Proceedings, vol. 28, 

 No. 2, p. 526. Abstract only. 



The nature of symbiotic relation of blue 

 crabs from waters of various salinities with 



Carcinonemertes carcinophila, Acan- 

 thodesia tenuis, and Balanus eburneus. 



Semling, H. V., Jr. 



1965. Plastic "can"— one step closer- 

 approved for crabmeat in Maryland. Canner/ 

 Packer, vol. 134, p. 36. 



Plastic containers for pasteurized crab 



meat. 



Serbetis, C. 



1959. Un nouveau crustace comestible en Mer 

 Egee Callinectes sapidus Rathbun (Decapode, 

 Brachyura). Proceedings of the General 

 Fisheries Council for the Mediterranean, vol. 

 5, No. 72, p. 505-507. 



Since 1954, the blue crab has progressively 

 invaded the Greek coasts and probably 

 could be used in the canning industry. It is 

 not known how this species was intro- 

 duced. 



Sette, O. E., and R. H. Fiedler. 



1925. A survey of the condition of the crab 

 fisheries of Chesapeake Bay, a preliminary 

 report. U.S. Bureau of Fisheries, Special 

 Memorandum 1607-14, 36 p. 



Ascertains the practices of the crabbing 

 industry and presents statistical data 

 showing the downward trend of the 

 fishery. Summary of life history. Recom- 

 mendations for conserving the supply. 



Severy, Hazel W. 



1923. The occurrence of copper and zinc in 

 certain marine animals. Journal of Biological 

 Chemistry, vol. 55, No. 1, p. 79-92. 



Copper and zinc content of 15 marine 

 animals and one land slug. The legs, the 

 shell, and the minced body (shell removed) 

 of C. sapidus were examined. 



Shea, Sean, David Sigafoos, and Donald Scott, 

 Jr. 



1969. The effect of calcium and potassium on 

 the thermal excitability of a model thermo- 

 receptor. Comparative Biochemistry and 

 Physiology, vol. 28, No. 2, p. 701-708. 



Peripheral nerves from the legs of the blue 

 crab respond to a cold stimulus in artificial 

 sea water with an impulse discharge. Prepa- 

 rations maximally excited to spontaneous 



63 



