DESCRIPTION OF SPECIES 



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distance beyond the outer, and with its rounded extremity fringed with delicate hairs. 

 The exopod of the uropod is shorter than the endopod; the latter is broad, with its 

 distal end obliquely truncated, and with the inner angle rounded and the outer pointed 

 and slightly produced (Fig. 4 b). 



Colour. Pale brown, becoming darker in the middle of the body, with dark brown 

 or black spots which vary considerably in number and size in different specimens. 



Distribution. From the Gulf of Peiias, in the north to the Falkland Islands in the 

 south ('Challenger'). 



i 



C. 



Fig. 4. Serolis schythei, Liitken, 5. polaris, Richardson, and 5. glacialis, Tattersall. 



S. schythei, Lutken. a, dactylus of third thoracic appendage of ?: x 20. b, uropod: ;< 20. 



5. polaris, Richardson, c, type of setae on propodus of second thoracic appendage, d, third thoracic 



appendage of immature o- e, fifth thoracic appendage of ^J. /, uropod. 

 S. glacialis, Tattersall. g, cutting edges of mandible: ;■' 42. 



[Serolis serrei, Lucas. 



S. serrei, Lucas, 1877, pp. cxlv, cxlvi; Beddard, 18846, p. 32. 



This species has not been recorded since it was first briefly described by Lucas in 

 1877 from a collection made by the French vessel ' Magicienne ' in the Strait of Magellan. 

 The description given by Lucas is repeated in the Challenger Report (Beddard, p. 32). 



According to Lucas the species is closely allied to S. trilobitoides. It measures 27 mm. 

 in length and 36 mm. in breadth ; its dorsal surface is covered with small brown spots, 

 whilst the ventral surface and the surface of the limbs is of a yellow colour. The coxal 

 plates are transparent and not serrated at their margins. The terminal segment is broader 



