BIOLOGICAL, SURVEY OF WOODS HOLE AND VICINITY. 



641 



Chondt 'acanthus phycidis Rathbun. 



R. Rathbun, 1886, p. 320 (sp. nov.); M. J. Rath- 

 bun, 1905, p. 101. 



From gills of Urophycis tennis, taken "off 

 Marthas Vineyard," 15 specimens, taken on 

 one occasion only (perhaps far beyond the 

 limits of the region). 



Family CALIGID^. 



Caligus belones Kroyer. 



C. B. Wilson, 19053, p. 586; M. J. Rathbun, 1905, 

 p. 91. 



From external surface of a fish in the Woods 

 Hole collection, labeled '' Coryphcena equiselis" 

 [probably C. hippurus] ; place of capture un- 

 certain .Wilson . 



Caligus bonito Wilson. 



C. B. Wilson, igosa, p. 589 (sp. nov.); M. J. Rath- 

 bun, 1905, p. 89. 



First obtained at Woods Hole, in summer of 

 1883, by R. Rathbun, who never published 

 a description. Found in the mouth and gill 

 cavity of Sarda sarda, as many as 100 having 

 been taken from a single fish. 



Larvae may be raised in August through three or 

 four successive molts; a typical metanauplius 

 and chalimus. Wilson (MS.). 



Caligus chelifer Wilson. 

 C. B. Wilson, 19053, p. 582 (sp. nov.); M. J. 



Rathbun, 1905, p. 91. 

 Hosts: Brevoortia tyrannus, Trichiurus lepturus, 



Xiphias gladius; external surface, rare. 

 Female specimens only known; breeds in July 



and August. 



Caligus curtus Miiller. 



Verrill and Smith, 1873, p. 575, 459 (no local 

 records); R. Rathbun, 18843, p. 486 (no local 

 records); C. B. Wilson, 19053, p. 578; M. J. 

 Rathbun, 1905, p. 90. 



Hosts: Gadus callarias, Hippoglossus hippoglos- 

 sus, Melanogrammus <zglefinus, Pollachius 

 virens, Raja l<zvi<;, Urophycis tennis; very 

 common on external surface and probably a 

 serious menace to the life of the fish; rarely 

 found in gill cavity. Wilso-i (MS.). 



Breeds from May to September; a typical nau- 

 plius occurs, colored with dark brown pig- 

 ment; chalimus may be found on cod in late 

 July or early August. Wilson (MS.). 



Caligus mutabilis Wilson. 



C. B. Wilson, 19053, 573 (sp. nov.); M. J. Rath- 

 bun, 1905, p. 90. 



Hosts: Centropristes striatus; also one specimen 

 each from Pollachius uirens and Sarda sarda; 

 found inside the mouth, fairly common. 



Breeds in July. Wilson (MS.). 



Caligus pelamydis Kroyer. 

 C. B. Wilson, 19053, p. 594. 

 Host: Sarda sarda; found in the gill cavity in 



company with Caligus bonito; rare and only 



the females known. Wilson. 



Caligus rapax Milne Edwards. 



Verrill and Smith, 1873, p. 575, 457; R. Rath- 

 bun, 18843, p. 487; C. B. Wilson, 19053, p. 

 568; M. J. Rathbun, 1905, p. 89. 



Hosts: Acipenser sturio, A losa sapidissima, Amr 

 modytes americanus, Carangus crysos, Carcharias 

 littoralis, Cyclopterus lumpus; Dasyatis centrum, 

 Gadus callarias , Kyphosussectatrix, Melanogram- 

 mus <zglefinus, Menticirrhus saxatilis, Mona- 

 canthus hispidus, Paralichthys oblongus, Polla- 

 chius virens, Pomolobus pseudoharengus, Pseudo- 

 plcuronectes americanus, Raja erinacea, Raja 

 lavis, Raja ocellaia, Remora remora, Roccus 

 lineatus, Scomber scombrus, Squalus acanthias, 

 Stenotomus chrysops, Trichiurus lepturus, 

 Urophycis chuss, Urophycis tenuis, Xiphias 

 gladius. Always an external parasite, often 

 being sufficiently numerous to seriously 

 injure the host. Frequently taken in tow. 



Breeds from April to October. Wilson (MS.). 



Caligus rufimaculatus Wilson. 

 C. B. Wilson, 19053, p. 561 (sp. nov.); M. J. 



Rathbun, 1905, p. 89. 

 Hosts: Fundulus heteroclitus, F. majalis, Mugil 



cephalic?, on external surface; also taken in 



tow net. 

 Breeds from June to September; chalimus stage 



found upon the host late in June or early in 



July. 



Caligus schistonyx Wilson. 



C. B. Wilson, 19053, p. 564 (sp. nov.); M. J. 



Rathbun, 1905, p. 89. 

 Hosts: Brevoortia tyranmis (common), Poma- 



tomus saltatrix (rare); external, also often 



taken in tow. 

 Breeds in late August or early September. 



Wilson (MS.). 



