PYCNOGONIDA OK THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 159 



The Genital apertures are on a prominent outgrowth at the distal extremity of 

 the second coxae of the two posterior pairs of legs. The eggs are numerous, and two 

 roughly spherical packets may be found on each oviger. 



Two specimens, both ovigerous males, were taken in Scotia Bay, at a depth of 

 10 fathoms. 



Leionymphon grande. 



Ammothea <jrandis, Pfeffer, (24), pp. 4345. 

 Colossendeis (?) Charcoti, Bouvier, (2), pp. 295-296. 

 Leionymplion grande, Hodgson, (13), pp. 41-43. 



This species was first described by Dr PFEFFER as coming from South Georgia. 

 Professor BOUVIKR has recorded it more recently from Carthage Bay, where it was 

 taken by the French Antarctic Expedition. A single adult female and several 

 immature specimens were captured by the Discovery off Coulman Island in the Ross 

 Sea. In the Report on the Discovery Pycnogonida I have described the species at 

 some length, and transferred it to a genus founded by Professor MOBIUS (22) for an 

 immature species taken off Bouvet Island. 



A single specimen only was taken by the Scotch Expedition in Scotia Bay, South 

 Orkneys, 14 fathoms, 26th March 1903. It is a male, not quite adult, retaining the 

 chelate condition of the chelifori ; and the genital apertures are not yet developed. In 

 point of size it is a good deal smaller than the adults, but otherwise does not exhibit 

 any important differences. The length of the body is 11 mm., its width 9 '5 mm. 

 The proboscis, which tapers very slightly towards the extremity, is 12 mm. long. 

 The legs have a length of only 42 mm., the proportions of the three principal joints 

 being 9 '5, 9, 12. There are only three stout spines proximally on the ventral side of 

 the propodus, and the distribution of the short stiff setae over the legs is quite uniform. 

 The ocular tubercle ends in a cone above the eyes. 



These are the only differences to be found between this specimen and the adult 

 taken by the Discovery. 



The oviger, however, presents important sexual features, and though this specimen 

 is not mature the appendage may be described in detail. The first joint is very small ; 

 the second is longer and stout ; the third is more slender, and has, as usual, a very 

 oblique termination ; if measured to the extremity of this it is about as long as the 

 preceding. Their outer margins are rather thickly covered with short setae. The 

 three following joints form a curvature in the opposite direction to the first three. 

 Their proportions are about as 5, 6, 3'5, and they are covered with short setae, but 

 more particularly so on the outer side. The precise proportions of the remaining 

 joints cannot be given, owing to their relations one to the other. The seventh 

 joint is shorter than the preceding, and articulated to it at something like a right 

 angle. Near its distal extremity it bears a tuft of setas. The eighth joint is richly 

 setose, and also articulated to the seventh at a considerable angle ; the two terminals 



(ROY. soc. EDIN. TRANS., VOL. XT.VI., 179.) 



