PYCNOGONIDA— CALMAN. 



41 



Surface of body smooth, the legs spinous, especially the distal segments. 



Measurements, in mm. 



Length of proboscis . " 



Diameter of proboscis at base 



Diameter of proboscis near tip 



Length of cephalon 



Greatest width of cephalon 



Width of neck 



Length of trunk 



Width between first and second lateral processes 



Width across second lateral processes 



Third right leg — 



First coxa . 



Second coxa 



Third coxa 



Femur 



First tibia . 



Second tibia 



Tarsus and propodus 



Claw 



Remarks. — This species is allied to A. hracliyura, especially iu the armature of spurs 

 on the lateral processes and proximal segments of the limbs and iu the shortness of the 

 abdomen. It differs from that species, amongst other characters, in the form of the 

 proboscis with its slender distal part and conspicuous apical brush, and in the long and 

 sharply pointed immovable finger of the chela. 



Genus PALLENOPSIS, Wilson. 



Pallenopsis glabra, Mobius. 



Pallenopsis glabra, Mobius, 1902, p. 184, PL xxvii, figs. 1-6 ; Hodgson, 1907, p. 11 ; Bouvier, 



1913, p. 109, figs. 62-65. 

 P. Uemalis, Hodgson, 1907, p. 17, PI. i, fig. 4, PL ii, fig. 3. 



Occurrence. — Station 314, McMurdo Sound, 222-241 fathoms; 1 ?. Station 338, 

 Entrance to McMurdo Sound, 207 fathoms; 5 ?, 4 ^, 1 immature. Station 355, 

 McMurdo Sound, 300 fathoms ; 1 ?. 



Remarks. — Except that they are a good deal larger and more spiny, the 

 " Discovery" specimens referred by Hodgson to P. ^Za6ro do not seem to me to differ 

 greatly from the types of his P. hiemalis. Most of the specimens obtained by the 

 " Terra Nova " resemble very closely the types of P. hiemalis, but they show a good 

 deal of variation in the development of spines or setse on the body and limbs, although 



