348 



DISCOVERY REPORTS 



slightly broader than long, by a suture. The second joint of the palp is broadest distally, 

 with its inner margin fringed with setae; the third joint is more or less parallel-sided, 

 with its inner distal end rounded and fringed with setae. Near the extremity of this 

 joint, at its outer angle, is a fourth small joint ; the distal extremity of this joint does not 

 extend beyond that of the third, and it is truncate, bearing six long setae. Similar joints 

 are present in a corresponding position on the maxillipeds of several other species. 



Fig. 19. Serolis platygaster, n.sp. 

 a, maxilliped: x 14. b, second thoracic appendage: x 14, c, third thoracic appendage of (J: x 14. 



£f,uropod: x 24. 



The second thoracic appendage has its propodus greatly expanded, with its inner 

 margin armed with a row of about thirty-five broadly oval processes alternating with 

 modified spines (Fig. 19 b). As is usual in the adult male the third thoracic appendage 

 is modified (Fig. 19 c). The proximal angle of the expanded propodus is produced 

 so that the inner margin appears to be considerably hollowed out ; this margin is armed 

 with a double row of modified spines (see figure), three pairs of which are situated 

 on the inner surface of the produced angle, whilst a further six pairs are arranged along 

 the remaining part. The dactylus is shorter than the propodus and terminates distally 

 in two short spines, one of which is larger and stronger than the other ; the inner margins 

 of the carpus and merus are densely fringed with short hairs. Most of the thoracic 

 appendages are incomplete, the last does not differ except in size from those that pre- 

 cede it. 



The protopodite of the first three pairs of pleopods is triangular in shape with the 

 produced angle bearing plumose setae, three on the first, and two on the second and 



