282 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [576] 
The Lepeophtheirus salmonis Kroyer, is found upon the salmon of the 
northern coast of New England. 
ECHTHROGALEUS COLEOPTRATUS Steenstrup and Liitken. (p. 459.) 
Op. cit., 380. Dinematura coleoptrata Guérin, Ienographie du Regne animal, Crust. 
Pl. 35, fig. 6. Dinemoura alta Baird, British Entomostraca, p. 285, Pl. 33, figs, 
6,7. 
Vineyard Sound, September 19, from the back fin of the mackerel- 
shark, (Lamna punctata.) It has been found upon the English coast and 
off the Azores. 
ECHTHROGALEUS DENTICULATUS Smith, sp. nov. (p. 459.) 
Carapax broader than long, with a very slight median emargination 
in the outline of the front. Posterior portion of the body scarcely longer 
and not quite as wide as thecarapax. Dorsal plates, or elytra, covering 
much more than half the genital segment, their inner and posteriar 
margins armed with a regular series of small teeth. The posterior lobes of 
the 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 bréad, somewhat rectangular, but narrowed dis- 
tally and not projecting behind the dorsal plate; the terminal lamelle 
nearly as long as the tail, narrow, linear, nearly three times as long as 
broad, and armed at the tip with several seti. 
Length, 9™™ ; breadth of carapax, 5.1; length of elytra along the inner 
margin, 2.5. 
Vineyard Sound, on Atwood’s shark, (Carcharias Atwoodi.) 
?PANDARUS CRANCHII Leach. (p. 459.) 
Dict. des Sci. nat., tome xiv, p. 535, 1819, (teste Edwards et al.;) Edwards, Régne 
animal de Cuvier, 3™¢ éd., Crust., Pl. 78, fig. 2; Steenstrup and Liitken, op. 
cit., Pl. 11, fig. 22. 
A number of specimens of a Pandarus, taken from a dusky shark 
(Eulamia obscura) on the south side of Long Island in 1870, differ only 
very slightly from the figures and descriptions of P. ranch 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, having the caudal appendages shorter and obtuse, besides 
some slight differences in the natatory legs. 
Nogacus LATREILLU Leach. Plate VII, fig. 32. (p. 457.) 
Dict. des. Sci. nat., tome xiv, p. 536, 1819, A tendrus et al.;) Régne animal 
de Cuvier, Crust,, PI. 79, fig. 3; Hist. nat. des Crust., tome iii, p. 459 ; Steen- 
strup and Liitken, op. cit., p. 384, Pl. 9, fig. 18. 
Vineyard Sound, in company with the last species, on Atwood’s shark. 
All the species of Nogagus are males of the allied genera, Pandarus, 
