PYCNOGONIDA. 43 



lateral band of some width, almost completely bare of them. On the two tibire the 

 same arrangement of the setfe occurs, except that along the middle of the bare band 

 there is a narrow baud of sette two or three wide. The distal fringes of the femur and 

 first tibia are not conspicuous, but that of the second tibia is formed of stout spines 

 chiefly on the ventral surface. The tarsus is a very small joint, and forms a cup-like 

 socket for the propodus (fig. Ib); it is thickly covered with small spines, and its distal 

 fringe is well developed, especially veutrally, where it is formed of very stout spines. 

 The propodus is covered thickly with stout setae with only an irregular vestige of the 

 bare band found on other joints ; it is slightly curved, and its ventral side bears 

 proximally four or more very stout spines, of which the first is the smallest ; the rest 

 of the margin is taken up with setas small, but larger than the average ; close to the 

 terminal claw is a group of large setse, one of which at least is a rather prominent 

 spine, The extremity of the joint is oblique, and forms a rounded spinose projection 

 or heel beyond the origin of the stout claw, which, with its two powerful auxiliaries, 

 arise from a common investment. 



The single adult specimen captured is a female, and the Genital apertures are 

 conspicuous on the second coxa of each leg. Five smaller specimens were, however, 

 taken at the same time and place, varying in size from 9 "5 mm. to 18 '5 mm. over all. 

 These present several differences of no small importance. The proboscis differs slightly 

 in form, being more tapering the smaller the specimen, and it is also more rigidly 

 articulated to the body ; in none of them is it movable through so large an angle as 

 in the adult. The chelifori are proportionally the same size as in the adult, but a 

 perfect chela is developed. This is small and feeble, the fingers curved like a pair 

 of callipers, and devoid of teeth. On the body the dorsal ridges are raised into a 

 more definite median point, and the tubercles which give an angular appearance to the 

 lateral processes and first coxae of the adult are now rather more prominent and carried 

 on to other joints. The pre-abdominal tubercle is a very variable structure, and is 

 sometimes prominent in one case almost absent. The palps do not call for any fresh 

 description, but the ovigers show several interesting stages in their development (figs. 

 Ic-lf). In the smallest specimen only the merest vestige of such an appendage exists. 

 In the next specimen four joints as such may be distinguished, the last one showing an 

 indication of future segmentation. In another, six joints are fairly well established, 

 the penultimate one showing traces of another division. In the largest of the 

 immature specimens the oviger possesses the full number of ten joints, but they are 

 very small, and the four terminal ones are only indicated and not clearly developed. 



Cape Wadworth, Coulman Island, 8-15 fathoms. Bottom : stones. Several 

 adult specimens were taken by the ' Franeais ' off the west coast of Graham's Land, 

 and one was taken by the ' Scotia.' The examination of Professor Pfeffer's Ammothea 

 grandis from South Georgia has established the identity of this species beyond all 

 question. 



