576 EEPOET OF COMMISSIONEK OF FISH AND FISHERIES. 



The Lepeophtheirus salmonis Krojer, is found upon the salmon of the 

 northern coast of New England. 



ECHTHROGALEUS COLEOPTRATUS Steenstrup and Llitken. (p. 459.) 



Op. cit., 380. Dinematura coleoptrata Gu^rin, Icnograpbie du Regne animal, Crust. 

 PL 35, fig. 6. Dinemoiira alta Baird, British Entomostraca, p. 285, PL 33, tigs. 

 6,7. 



Vineyard Sound, September 19, from the back fin of the mackerel- 

 sbark, {Lamna punctata.) It has been found upon the English coast and 

 off the Azores. 



ECHTHROGALEUS DENTICULATUS Smith, Sp. nov. (p. 459.) 



Oarapax broader than long, with a very slight median emargination 

 in the outline of the front. Posterior i^ortion of the body scarcely longer 

 and not quite as wide as the carapax. Dorsal plates, or elytra, covering 

 much more than half the genital segment, their inner and posterior 

 margins armed with a regular series of small teeth. The posterior lobes of 

 tbe genital segment somewhat triangular and each terminated by a stout 

 spine. Dorsal plate of the tail elongated, obtusely rounded at the ex- 

 tremity, and exposed from above by the very broad sinus in the genital 

 segment. The tail itself broad, somewhat rectangular, but narrowed dis- 

 tally and not projecting behind the dorsal plate ; the terminal lamellae 

 nearly as long as the tail, narrow, linear, nearly three times as long as 

 broad, and armed at the tip with several setae. 



Length, 9"^™ 5 breadth of carapax, 5.1 5 length of elytra along the inner 

 margin, 2.5. 



Vineyard Sound, on Atwood's shark, {CarcJiarias Atwoodi.) 



?Pandarus Granchii Leach, (p. 459.) 



Diet, des Sci. iiat.,tome xiv, p. 535, 1819, (teste Edwards et aL ;) Edwards, Regne 

 animal de Cuvier, 3™^ ed., Crust., PL 78, fig. 2; Steenstrup and Liltken, op. 

 cit., PL 11, fig. 22. 



A number of specimens of a Pandarus, taken from a dusky shark 

 {Eulamia ohscura) on the south side of Long Island in 1870, differ only 

 very slightly from the figures and descrii^tions of P. Crancliii quoted 

 above. 

 Pandarus, species. Plate VII, fig. 31. (p. 457.) 



Vineyard Sound, on Atwood's shark, {Carcharias Atwoodi.) It is, per- 

 haps, only a variety of the last species, but differs considerably from it, 

 wanting almost wholly the series of spines upon the posterior margin 

 of the carapax, havingthe caudal appendages shorter and obtuse, besides 

 some slight differences in the natatory legs. 



NoGAGUS Latreillii Leach. Plate VII, fig. 32. (p. 457.) 



Diet. des. Sci. nat., tome xiv, p. 536, 1819, (teste Edwards et al. ;) R^gne animal 

 de Cuvier, Crust., PL 79, fig. 3 ; Hist. nat. des Crust., tome iii, p. 459 ; Steen- 

 strup and Llitken, op. cit., p. 384, PL 9, fig. 18. 



Vineyard Sound, in company with the last species, on Atwood's shark. 

 All the species of Nogagtis are males of the allied genera, Paudarus, 



