STENHELIA. 143 



fourth pair, represented by the drawing (PI. XI. fig. 1), 

 has the outer and inner branches of nearly the same length, 

 but the outer is rather the longer one. 



The fifth pair, which are, small, have the basal joint broadly 

 subtriangular, but with the apex truncated and provided 

 with three setse of nearly equal length, and there is also a 

 seta of about the same length as the others near the lower 

 end of the inner margin (PL XI. fig. 2) ; secondary branch 

 narrow subcylindrical, breadth scarcely equal to half the 

 length, the apex is slightly produced to form the base for a 

 slender seta, a slender seta springs from near the distal end 

 of the inner margin, there are about four setse on the outer 

 margin, the two lower ones being stouter than the others. 



The Unreal joints are very small. 



Habitat. Near Eddystone Lighthouse, collected Auo-ust 

 31st, 1903; apparently not common; no males have been 

 observed. 



Remarks. The small size of the female, the peculiar struc- 

 ture of the antennules, the structure of the first pair of 

 thoracic feet, and the form and armature of the fifth pair 

 distinguish this species from any other known to us. 



STEXHELTA SIMULANS, Norman & T. Scott. (Pis. X. fio- 6 

 XIII. fig. 8 ; XIV. fig. 4; XVII. fig. 1; XXI. fig. 1.) 



1905. Stenhelia simulam, Normau & Scott, Ann. & Mao-. ]S"at. Hist, 

 ser. 7, vol. xv. p. 255. 



The form described under this name has a general resem- 

 blance to Stenhelia ima, G. S. Brady, both in the general 

 figure of the species, and in some of its structural details, so 

 that without dissection it may readily be mistaken for that 

 species. 



The female antennules, which are eight-jointed, are mode- 

 rately stout, but scarcely so elongated as those of S. iia ; 

 the first four joints taken together are equal to about twice 

 the entire length of the last four; the length of the first, 

 second, and fourth joints is nearly the same, but the second 

 is rather the longer one; the third, which is nearly as long- 

 as the end joint, is scarcely half the length of the joint that 

 precedes it ; the fifth, sixth, and seventh joints are small, 

 the fifth being the smallest and the seventh the longest of the 

 three, as shown by the drawing (PI. XXI. fig. 1). The 

 proportional lengths of all the joints are approximately mven 



iT f 1 JO 



in the formula : 



Proportional lengths of the joints. . 20 . 26 . 12 . 20 . (1 . 7 . . 14 

 Numbers of the joints T 2 3 4 567 8~ 



