414 



" THETIS " SCIENTIFIC RESULTS. 



Fourth leg. 



Fig. 117c. 



ceptil)ly thickened at the extremity. Seventh joint curved, 

 tapering, about lialf the length of the sixth. 



The second joint of the fourth pair of legs is 

 nearly twice as long as the corresponding joint 

 of the second ; both the upper and lower borders 

 are ai'med with a series of unequal spinules and 

 five or six spines ; some of the latter are equal 

 to or exceed the transverse diameter of the 

 joint ; the third to the fifth joints are similar to 

 those of the second pair of legs, but the spinules, 

 spines and the distal thickenings are much more 

 pronounced. 



The second joint of the fifth pair of legs is 



about three times as long as broad, and of 



nearly equal width throughout ; the superior 



border is minutely spinulose. The following 



three joints are successively one-third shorter; 



each has the basal portion slender, the apical 



part dilated and encircled with a subdistal 



series of stout seise. 



Sixth joint nearly as long as the second, slightly narrowed 



in its proximal third, with a few scattered setse on the borders. 

 Seventh joint stout, curved and equal to the 

 third joint in length. The sixth and seventh 

 pairs of legs are similar to the fifth, but 

 slightly less in size. The pleopods are devoid 

 of any special features. The uropods are 

 furnished with a few stoutish spines and 

 many small spinules. 



This species is remarkable in having the 

 third to the fifth joints of the outer antennse 

 and of all the legs, except the first, nodose at 

 their distal extremities. 



Four examples of this species were obtained 

 off Botany Bay in 20 to 28 fathoms. 



Fifth les-. 

 Fig. md. 



ARCTURUS SERRULATUS, sp. nov. 



(Figs. 118a-c.) 



Station 57. 



Adult female: — Body 11 mm. long; the upper surface is 



. ornamented with a series of spines and tul)ercles ; these latter are 



disposed as follows : — The ceplialon carries a pair of compressed 



spines on the front, immediately Ijeliind the truncated antei'ior 



