i5« 



DISCOVERY REPORTS 



In M. similis the spines are much more dense, small in the region of the statocyst, but increase in size 

 distally. The spine row appears to be variable in length, but usually extends only from the distal 

 portion of the statocyst to about half way along the endopod. In M. major the spine row is composed 

 of very small spines which are of equal size throughout, extremely dense and extend from the distal 

 region of the statocyst to about seven-eighths of the total length of the endopod. 



Distribution. Identical with that of M. similis, except that it has only been taken in shallow 

 water. 



Fig. 38. Mysidopsis similis (Zimmer). A, right antennular peduncle of adult male; B, right antenna; C, maxilla; D, first 

 thoracic appendage without epipod; E, endopod of second thoracic appendage; F, endopod of sixth thoracic appendage; 

 G, fourth pleopod of male; H, endopod of right uropod; J, telson. All x 36. 



Mysidopsis acuta Hansen, 1913 



1913 Mysidopsis acuta Hansen, p. 16, figs. \ &• JV / 



1 92 1 Mysidopsis acuta, Hansen, p. 3. 



Occurrence : 



St. 49. 3. v. 26 (night). Off Cape Bougainville, East Falkland I., 0-5 m., 2 adult c?c?> IO '5 mm - 

 St. 51. 4. v. 26 (day). East Falkland I., 105-115 m., 1 <£, 11 mm., 2 $?, io-8 mm. 

 St. 56. 16. v. 26 (day). East Falkland I., 105-16 m., 1 juv. $, 4-8 mm. 



St. 123. 15. xii. 26 (day). Off mouth of Cumberland Bay, South Georgia, 230-250 m., 3 ovig. $$, largest 12-6 mm., 

 10 imm. $$. 



