INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 451) 



List of external i)arasites observed on Jishes and oilier marine animals of 



Southern NeiD England. 



In the following list I have inclnded all the determined species ob- 

 served in these waters, whether living in the sounds, or in the outer 

 waters, or in the brackish waters of the estuaries, for most of these par- 

 asitic species are capable of living in as diverse conditions as do the ani- 

 mals which they infest, and most of the fishes pass from time to time into 

 each of the divisions named, though some, like the cod, are chiefly found 

 in the colder outer waters, and even there only in winter. 



The list is undoubtedly very incomplete for it is based chieflj' on col- 

 lections made during two seasons, and mainly in the summer months. 

 In addition to the true parasites I have, for greater convenience, in- 

 cluded in the list some that merely live on or with other animals, 

 either for the sake of shelter, or to feed upon their excretions, or to 

 share their food. Some of these would be properly classed as " commen- 

 sals." 



ARTICULATA. 



Grusiacea. 



Pinnotheres ostreum, (p. 3G7,) in oysters. 

 P. maculatus, in Mytilus edulis. 

 Laphystius sturionis, on goose-fish and skate, (457.) 

 Hyperia, species, on jelly-fishes, (439.) 

 Nerocila munda, on file-fish. 

 Conilera concharum. 

 Livoueca ovalis, on blue-fish, (457.) 



Cepou distortus, in branchial cavity of Gelasimus, (457.) 

 Ergasilus labraces, on striped-bass. 

 Argulus catostomi, on the sucker, (Catostomus.) 

 A. laticaii^la, (457.) 

 A. latus. 

 A. megalops. 

 A. alosie, ou " alewives." 

 Caligus curtus, on cod-fish. 

 C. rapax, on sting-ray, (Trygon hastata.) 

 Lepeophtheirus, sp., ou sting-ray. 



Lepeophtheirus, sp., on flounder, (Chaenopsetta ocellaris.) 

 -^ EchthrogaLus coleoptratus, on mackerel-shark, (Lamna punctata.) 

 E. deuticulatus, ou Atwood's shark, (Carcharodon Atwoodi.) 

 Paudarns Cranchii, (?) on dusky shark, (Platypodon obscurus.) 

 Pandarus, sid., on Atwood's shark, (Carcharodon Atwoodi.) 

 Nogagus Latreillii, on Atwood's shark, (457.) 

 N. tenax, on Atwood's shark, (457.) 

 Pandarus sinuatus, on the " dog-fish," (Mustelus canis.) 

 ' Cecrops Latreillii, on Othagoriscus mola. 



