20 
E. Ii. Wilson — Pycnogonida of New England. 
Nymphon grossipes Chr. Fabr. 
? Phalangium marinum Strom, Sondmor, p. 208, 1762. 
Phalangium grossipes Linne, Syst. Nat., ed. xii, i, p. 1027, 1767. 
Pycnogonum grossipes 0. Fabr., Fauna Gronlandica, p. 229, 1780. 
? Nymphum grossipes Sabine, Suppl. to the Appendix Capt. Parry’s First Voyage, 
p. 225, 1824. 
Nymphon grossipes Chr. Fabr., Ent. Syst., Tom. 4, p. 217. 1794; Latreille, Hist. Nat. 
des Crust, et des Insect., Tom. vii, p. 333, 1804 ; Genera Crust, et Insect., Tom. i, 
p. 143, 1806; Kroyer, Nat. Tidss., lste Bind, 2det Haefte, p. 208, 1844; Isis, 
Jahrg. 1846, Heft vi, p. 442; Voy. en Scand., Laponie, etc., PI. 36, figs, \cv-h ; 
Stimpson, Inv. Grand Manan. p. 38, 1853; Buchholz, Zvveite Deutsche Nordpol- 
fahrt, Crust., p. 396, 1874; Verrill, Amer. Journ. Sci., vol. vii, p. 502, 1874. 
Nymphon mixtum Kr., Nat. Tidss., lste Bind, 2 det Ihefte, p. 110 ; Voy. en Scand., 
Laponie, etc., PI. 35, figs. 2a-/; Buchholz, 1. c., p. 397. 
Nymphon brevitarse Ivrbyer, Nat. Tidss., lste Bind, 2det Hgefte, p. 115; Voy. en 
Scand., Laponie, etc., PL 36, figs. 4a-/. 
Nymphum hirsutum Kr., Gronland’s Amfipoder, S. 92, (teste Kroyer). 
Plate VII, figures 1 a to 1 q. 
Body slender, smooth. Oculiferous segment variable ; in some 
specimens nearly as short and stout as in N. Stromii , in others much 
longer and very slender. Oculiferous tubercle very prominent, coni- 
cal, very acute. Eyes black, oval or nearly round. Abdomen small, 
tapering, often bent upward. 
Rostrum large, somewhat variable, but usually shorter than the 
oculiferous segment, slightly swollen at the extremity. 
Antennae slender, basal joint about as long as the rostrum ; chela 
similar to that of N. longitarse , but stouter, the claws shorter, slightly 
hairy. 
Palpi slender, with a few small hairs most numerous on the outer 
joints; basal joint, nearly quadrate, about one-fourth the second; 
third slightly longer than the first two united ; fourth less than half 
the third ; fifth longer, slender, tapering, somewhat variable, being 
stouter in some specimens than in others. 
Accessory legs very slender. In the male they are, on an average, 
about one-eighth the extent of the legs ; in the female about one-sixth. 
The joints have nearly the same proportions as in N. longitarse, but 
the fourth and fifth joints are longer and still more slender. 
Legs long and slender, proportions of the first six joints nearly as 
in N. Stromii. Tarsus extremely variable in length (PI. VII, figs. 
1 b to 1 g) ; in young specimens it is less than half the propodus, while 
in some large adult specimens it is nearly twice that joint; the 
propodus is armed, on the inferior margin, with a series of slender, 
