152 DISCOVERY REPORTS 



inner three are progressively shorter towards the cleft. Cleft very deep and widely rounded at its 



base; armed on each side with 20-21 regular teeth (Fig. 35 E). 



Length of adults of both sexes, 20 mm., though animals may be sexually mature at a length of 

 16 mm. 



Fig. 35. Mysidetes patagonica sp.n. (A-E). A, anterior end of female in dorsal view, x 12; B, left antenna, x 16; C, eighth 

 thoracic appendage of adult male, x 12; D, left uropod, x 16; E, telson, x 16. 



Mysidetes anomala sp.n. (F-J). F, left antenna of male ; G, eighth thoracic appendage of male of 20 mm. ; H, right uropod 

 of female; J, telson of female. All x 14. 



Remarks. This species can readily be recognized by the slender, outwardly curved antennal scale, 

 the large eyes, the long slender uropods and, especially, by the strong, regular spines arming the telson. 

 Males can also be distinguished by the unusually short thick genital appendage. The specimen, from 

 which Fig. 34 C was made, had a large dense brush of setae on the antennule and appeared to be adult, 

 and I do not think that the shortness of the genital organ is due to immaturity. 



Distribution. This species was taken at twelve stations on the Patagonian Shelf to the north and 

 west of the Falkland Islands and at two stations in the Strait of Magellan. 



