CO 



_J 

 < 



9 



> 



00 



ID 



o 



Peridonimus 



Anomia 



Trilasmis 

 I I SteQo poma 



Worm tubes 

 ^ No fouling 



Figure l. — Occurrence ofepizoiteson male and female Ba^/i^'/ieciessMperfcus atanecdysis 

 (C1-C4), proecdysis (D1-D4), and postecdysis (A2-B2) for four modal size (short carapace 

 width) groups («35 mm, 36-45 mm, 46-57 mm, s=58 mm). 



quinquedens Smith (Pilsbry 1907) and Cancer 

 borealis Stimpson, collected from the same cruises 

 from yjhich Bathynectes were obtained. Trilasmis 

 (Poecilasma) was also observed on mature 

 lobsters, i/omarus americanus H. Milne-Edwards. 

 These decapods are bathymetric associates of 5. 

 superbus (Lewis 1975). Trilasmis (Poecilasma) 

 has also been found on Hyposophrys noar, a 

 brachyuran from the Straits of Florida (Williams 

 1974). 



Anomia aculeata has been recorded from the 

 Arctic Ocean to Cape Hatteras, N.C. within a 

 bathymetric range of 1.8 to 144 m (Smith 1937). 

 The stations at which this pelecypod occurred on 

 Bathynectes were in depths greater than 200 m. 



The hydroid, Stegopoma plicatile, is common 

 along the east coast of the United States from 

 Hudson Bay to Cape Hatteras with a bathymetric 

 range of 45 to 1,733 m (Fraser 1944). 



Acknowledgments 



I thank Frank Holland (North Carolina Divi- 



sion of Commercial and Sports Fisheries) for col- 

 lection of specimens (RV Dan Moore) and Charles 

 Wenner (Virginia Institute of Marine Science; RV 

 Albatross IV). Ship time on RV Columbus Iselin 

 and RV Eastward was provided by J. A. Musick 

 through NSF grants GS-37561 and GS-27725, re- 

 spectively. Dale Calder (South Carolina Marine 

 Resources Research Institute) identified the hy- 

 droids found onB. superbus, and Mariana Doyle 

 (U.S. National Museum) confirmed identification 

 of Trilasmis (Poecilasma) kaempferi in- 

 aequilaterale . I also thank George Grant, P. A. 

 Haefner, Jr., Fred Jacobs, and W. A. Van Engel for 

 their criticism of the manuscript. 



Literature Cited 



Capart, a. 



1951. Crustaces decapodes, Brachyures. Exped. oceanogr. 



Beige dans les Eaux cotieres afr. Atl. Sud. (1948-1949) 



3(l):ll-205. 

 Drach, p., and C. TCHERNIGOVTZEFF. 



1967. Sur la methode de determination des stades d'inter- 



mue et son application generale aux crustaces. Vie 



Milieu 18:595-609. 



226 



