eddy on the Georgia continental shelf, April, 1977. Deep- 

 Sea Res. 

 Menzies. r.. and VV. KRUCZYNSKI. 



In press. Isopod Crustacea (excludinji Epicaridiai. Mem. 

 Hourglass Crui.ses. 

 MOREIRA. R S., AND V. SADOWSKY. 



197<S. An annotated bibliography ol' parasitic Isopoda 

 iCrustaceai of Chondrichthyes. Bol. Inst. Oceanogr. 

 27(21:95-152. 



Nielsen, S.. and J. StrOmberg. 



1965. A new parasite of Cirolana horealis Lilljeborg be- 

 longing to the cryptoniscinae (Crustacea Epicarideai. 

 Sarsia 18:37-62. 

 OVERSTREET, R. 



1978. Marine maladies? Worms, germs and other sym- 

 bionts from the northern Gulf of Mexico. Blossman 

 Print. Co.. Inc., Ocean Springs, Miss., 140 p. 

 RICHARDSON, H. 



1904. Contributions to the natural history of the Isopoda. 

 Proc. U.S. Natl. Mus. 27:1-89. 



1905. A monograph on the Isopods of North America. 

 U.S. Natl. Mus. Bull. 54. 727 p. 



SARS, G. 0. 



1899. An account of the Crustacea of Norway. Vol. II 

 Isopoda. Bergen Mus., Bergen, Norway, 270 p. 

 SCHLTLTZ. G. A. 



1969. How to know the marine isopod crustaceans. Wm. 

 C. Brown Co., F\iblishers, Dubuque. Iowa, 359 p. 

 SIGEL, M., W. RUSSELL. J. JERSEN. AND A. BEASLEY. 



1968. Natural immunity in marine fishes. Bull. Off Int. 

 Epizoot. 69:9-10. 



Patricia M. Bird 



Mote Marine Laboratory 

 1600 City Island Park 

 Sarasota, FL 33577 



A FLUSHING-CORING DEVICE FOR 



COLLECTING DEEP-BURROWING INFAUNAL 



BIVALVES IN INTERTIDAL SAND 



In planning a study on the population dynamics 

 and annual secondary production of deep-burrow- 

 ing infaunal bivalves, a device was required which 

 could take samples in shallow intertidal sand. 

 Though many grabs or coring devices described 

 in the literature (Brett 1964; Hopkins 1964; Mait- 

 land 1969; Kajak 1971) might have been suitable 

 for taking short cores ( 20-30 cm deep) in intertidal 

 or even subtidal areas, none were found suitable 

 for taking large numbers of quantitative samples 

 to a depth of 65-70 cm below the sediment surface. 

 A device similar to one described by Van Arkel 

 and Mulder (1975) was built to achieve this goal. 



FISHERY BULLETIN: VOL. 79, NO. 2, 1981. 



Materials 



The device (Figure 1) was built according to the 

 specifications outlined in Table 1. All materials 

 are obtainable from either hardware or plumbing 

 supply houses and are interconnected using poly- 

 vinyl chloride (PVC) cement, nuts, and bolts. 



Operation 



When intertidal samples are taken, the site is 

 visited at high tide or when the water over the site 



SIEVE 

 BASKET 



ELBOW 

 BEND 



SCREE 



HANDLE 



HOSE 



CONNECTION 



OUT ER PIPE 



INNER PIPE 



Figure l. — Flushing-coring sampler. Arrows indicate direction 

 of waterflow. Centrifugal water pump, gasoline engine, and 

 water hoses are not shovvTi. 



Table l. — Dimensions and materials used in the construction 

 of the flushing-coring sampling system. 



'High-pressure (22 m^;h) water pump and 3-hp gasoline engine. 



383 



