E. jB. Wilson — Pycnogonida of Neio England. 
17 
Three specimens only, taken in the Bay of Fundy by the U. 8. 
Fish Commission, in 1872. In general appearance it is closely similar 
to Achelia spinosa. 
Nymphon Chr. Fabricius. 
Body slender. Neck distinct. Rostrum cylindrical, rounded. 
Antennae three-jointed, chelate. Palpi five-jointed. Accessory legs 
present in both sexes, eleven-jointed. Legs slender ; dactylus with 
auxiliary claws. 
All the species of Nymphon are slender, some of them exceed- 
ingly so. The antennae are slender and the claws of the chelae are 
armed along their opposable edges with a series of close set, slender 
spines. The sexes generally resemble each other closely, the chief 
differences being found in the accessory legs. These appendages are 
armed, in both sexes, with a series of flattened denticulated spines, 
borne on the seventh, eighth, ninth, and tenth joints. The auxiliary 
claws are not large. The genital openings are small, sometimes 
minute. 
In certain species the specific characters are extremely variable, as 
described below. 
Nymphon Strcemii Kroyer. 
Nat. Tidss., lste Bind, 2det Hsefte, p. Ill, 1844; Voy. en Scand., Laponie, etc., 
PI. 35, figs. 3 a-f ; Miers, Ann. and Mag. Nat. Hist., 4th series, vol. 20, No. 1 1 G, 
p. 109. 
Nymphon giganteum Goodsir, Ann. and Mag. Nat. Hist., vol. xvi, No. xeviii, p. 293, 
1845; Terrill, Am. Journ. Sci. and Arts, vol. vii, p. 411, 1874. 
t Nymphon gracilipes Gamil Heller, Die Crustaceen Pycnogoniden und Tunicaten der 
K. K. Osterr-Ungar. Nordpol-Exp., p. 16, Taf. iv, fig. 15, Taf. v, figs. 1, 2. 
Plate VI, figures 1 a to 1 h. 
Body very stout, nearly smooth. Neck very short, but deeply con- 
stricted. Oculiferous segment large, longer than the two following 
segments united, stout and swollen anterior to the constriction of the 
neck. Oculiferous tubercle prominent, smoothly rounded. Eyes 
very distinct, black, ovate. Abdomen small, tapering toward the 
extremity. 
Rostrum rather large, nearly cylindrical though slightly expanded 
in the middle. 
Antenna; smooth, rather slender; basal joint as long as the ros- 
trum; claws of chelae remarkably slender and elongated, gently 
curved, when closed meeting along nearly their whole length ; they 
Trans. Conn. Acad., Vol. V. 3 July, 1878. 
