254 DISCOVERY REPORTS 



I. Pleon serrate. Peduncle of all uropods slender, rami narrow lanceolate serrata 



II. Pleon not serrate. 



A. 5th joint of gnathopod 1 broad, 4th joints of peraeopods 1-3 narrow. 



1. Peduncles of uropods 1 and 2 stout, rami ovate lanceolate. Telson as long as 

 peduncle of uropod 3. 



a. Rostrum distinct sayana 



b. Rostrum obsolete pacifica 



2. Peduncles of all uropods slender, rami narrow lanceolate. Telson much shorter 



than peduncle of uropod 3 ... ... ... ... ... ... ... ••• aestiva 



B. 5th joints of gnathopod 1 narrow, 4th joint of peraeopods 1-3 broadly expanded ... remipes 

 Both Stebbing (1904) and Stephensen (1923, p. 3) consider that mtirrayi should 



be relegated as a synonym of felina, and it seems possible that aestiva may also be 

 synonymous, though both Chevreux (1920) and Stephensen (191 8 and 1923) retain the 

 latter as a distinct species. 



Chevreux's species stephenseni (1920) seems to be a young form (12 mm.) with the 

 3rd~5th peraeopods nearly the same length. Compare the young specimens of pacifica 

 {infra) in which also the anterior peraeon segments are swollen, and the 3rd and 4th 

 peraeopods have not attained their full elongation. 



Lanceola sayana, Bov. 



Bovallius, 1887, p. 30, pi. iv and pi. v, fig. 1. 

 Stephensen, 1918, p. 8, figs. 1-3; 1923, p. 3. 

 Chevreux, 1920, p. 1. 



Woltereck, 1927, p. 60, figs. 1 a, 1 b, 2, 3, 4 a, 4 c. 

 Occurrence: 1. St. 284. East mid- Atlantic. 2 immat. 15 and 17 mm. 



2. St. 285. East mid-Atlantic. 3 immat. 15-17 mm. (largest perhaps S). 



3. St. 286. East mid-Atlantic (102-0 m.). 1 c? 19 mm. 



4. ditto (125-0 m.). 1 c? 22 mm., 2 juv. 12 and 14 mm. 



5. St. 288. East mid- Atlantic. Three specimens 19-22 mm., 1 juv. 15 mm. 



6. St. 294. East mid-Atlantic. 1 S 22 mm. 



Remarks. This species seems to be rather less bathypelagic than the other species. 

 Tattersall (1906, p. 16) records it from the surface. 



Distribution. Atlantic, 56 N-32^ S; Indian and Pacific Oceans. 



Lanceola serrata, Bov. 



Bovallius, 1887, p. 34, pi. v, figs. 2-13. 

 Stebbing, 1904, p. 29. 

 Tattersall, 1906, p. 17. 

 Stephensen, 1918, p. 15; 1923, p. 4. 

 Chevreux, 1920, p. 2. 

 Occurrence: 1. St. 9. South Atlantic (0-3500 m.). 1 $ 27 mm. 



2. St. 71. South-west Atlantic. 1 juv. 18 mm. 



3. St. 78. South Atlantic. 1 S 28 mm. 



4. St. 86. South-east Atlantic. 1 immat. (? ?) 27 mm. 



5. St. 89. South-east Atlantic. 1 $ 40 mm. 



6. St. 101. South-east Atlantic (1310-1410 m.). 1 ^ 32 mm. (poor condition). 



7. St. 107. South-east Atlantic. 2 ?? 42 and 27 mm. 



