PYCNOGONIDA OF NEW ENGLAND AND ADJACENT WATERS, 495 



Nymphon hirtum Fabricius. 



Ent. Syst., vol. iv, p. 417, 1794.— Kroyer, Nat. Tidss., Iste Bind, 2det Haefte, 



p. 113; Voy. en Scand., Laponie, etc., PI. 36, figs. 3a-g. — Norman, Rept. of 



the Brit. Assoc, for tlie Advancement of Sci. for 1868, p. 301.— Buchliolz, 



Zweite Deutsche Nordpolfahrt, p. 397, 1874. — Miers, Ann. and Mag. Nat. 



Hist., 4th series, vol. 20, Ko. 116, pp. 103-9, PI. IV, fig. 3, 1877.— G. O. 



Sars, Archiv for Mathematik og Naturvidenskab audet Bind, Tredie Hefte, 



p. 365, 1877. 

 ? Nymphon hirsutum Sabine, Supplement to the Appendix, Capt. Parry's First 



Voyage, p. 226, 1824. 

 Nymphon hirtipes Bell, Belcher's Last of the Arctic Voyages, Crust., p. 401, 



PI. XXXV, fig. 3, 1855.— Wilson, Trans. Conn. Acad., vol. v, p. 22, PL V, 



figs. 2 and 3; PI. VI, figs. 2a to 2k, July, 1878. 

 Nymphon femoratum Leach, Zool. Misc., vol. i, p. 45, PL 19, fig. 2, 1814. — 



Johnston, Mag. Zool. and Bot., vol. 1, p. 380, 1837 {teste Hodge). 



Plate VII, Figures 38 to 41. 



Body very robust, lateral processes scarcely separated. Oculiferous 

 segment broad and stout, neck very thick. Oculiferous tubercle much, 

 elevated, slender, rounded. Ej^es ovate, black. Abdomen slender, 

 tapering from the middle toward the base and tip. 



Antennae very hairy, rather stout, basal joint slightly longer than the 

 rostrum; claws of chelae slender, acute, very strongly curved, when 

 closed crossing each other at a considerable distance from the tips. 

 The spines, with which they are armed, are rather long, slender, and 

 not very closely set; toward the base they become strongly curved or 

 even hook-shaped. 



Palpi very stout; basal joint nearly quadrate, half the length of the 

 second; the remaining joints decrease regularly to the last. The 

 appendage is densely hairy; on the outer three joints the hah's are 

 densely plumose. 



The accessory legs differ considerably in the sexes. In the female 

 there are three short basal joints, followed by two which are considera- 

 bly longer, nearly equal, and somewhat clavate; the sixth is about two- 

 thirds the fifth, and the remaining joints become successively smaller to 

 the last, which is acute and claw-like, and armed below with a series of 

 opines. In the male the appendage is larger and stouter, the fifth joint 

 is about twice as long as the corresponding joint in the female, and 

 near its outer extremity it is swollen and furnished on each side with a 

 dense tuft of long hairs; the spines of the outer joints are scarcely 

 denticulated and alike in both sexes. 



Legs comparatively stout, often distended with the generative organs ; 

 first and third joints about as long as broad; second longer, somewhat 

 clavate, longer in the male than in the female; the three following 

 joints are much longer, the sixth longest; tarsus short, half the propo- 

 dus, which has, below, a series of slender spines ; dactylus about two- 

 thirds the propodus; auxiliary claws very small and slender, about 

 one-fifth the dactylus. All the appendages are thickly' covered with 



