DESCRIPTION OF SPECIES 



3SI 



is notched for the reception of a fourth joint which is short and narrow, not extending 

 to the end of the third joint and bearing six long setae at its distal end. A corresponding 

 joint is found on the palp of S. platygaster, n.sp. (Fig. 19 a), S.pagenstecheri, Pfeffer, 

 and S. gerlachei, Monod. 



a 5^ "^Z 



Fig. 20. Serolis bouvieri, Richardson. 

 a, peduncle and ten flagellar joints of antennule: x 20. b, cutting edges of mandible: x 15. c, second 

 thoracic appendage: x 7. d, third thoracic appendage of adult cJ: x 20. e, fourth thoracic appendage of tj: 

 X 6. /, last thoracic appendage of cJ: x 20. 



The second, third, fourth and eighth thoracic appendages of the male are shown in 

 Figs. 20 c-f. The propodus of the second appendage has its inner margin armed with a 

 row of thirty-six broadly oval processes, alternating with peculiar modified spines. The 

 distal edge of the carpus is crenulate and it bears two stout spines, each with a bifid 

 extremity. In the third thoracic appendage of the male (Fig. 20 d) the propodus is slightly 

 concave, broader at its proximal than at its distal end ; the broad end bears a group of six 

 pairs of stout spines ; three or four pairs are arranged along the proximal two-thirds of 

 its surface, and a few simple setae are also present. The spines are of the type shown in 

 the figure. The dactylus is rather short, curved, terminating in two spines, one of which 

 is larger than the other ; the inner margins of the carpus and the merus are fringed 

 with numerous fine hairs, which also extend along part of the margin of the ischium. 

 The last thoracic appendage is much smaller than the preceding. In the male (Fig. 

 20/) the dactylus is short and curved, and the inner margins of the propodus, carpus 

 and merus bear a dense fringe of long delicate hairs ; shorter hairs also occur on the 

 outer margins of these joints as well as on the inner margin of the ischium. The setae 



13-2 



