TESOH— PTEROPODA AND HETEROPODA 185 



small swellings at equal distances, but in some cases has a somewhat articulated appear- 

 ance, as in the female of Vayssiere's F. desmareMi. I would emphasize the fact that 

 I cannot explain, in this author's figure, the curious arrangement by which the two little 

 lobes, in which the body ends, and the caudal appendage are both inserted on the proximal 

 part of the visceral nucleus*. This peculiarity is not alluded to in any way in the text, 

 though it differs largely from all that is known about the tail of Firoloida. However, if 

 any error may be assumed to be excluded and the figure is taken from a normal specimen, 

 this character indeed is wholly different from that of F. kowalewskyi. 



2. LIST OF THE STATIONS, FROM WHICH HETEROPODS HAVE 



BEEN RECORDED. 



A. Plankton Stations. 



Stat. A, May 16, 2.58—3.43 p.m. N. of Chagos Archipelago. 

 Surface. Firoloida kowalewskyi (2 $$\). 



Stat. L, June 6, 8.40 — 9.40 p.m. Peros— Diego Garcia. 

 100 — fins. Atlanta lesueuri (l). 



Stat. N, June 30, 1—2.45 p.m. Peros Atoll. 



600 — fins. Oxy gyrus rangi (l), Atlanta peroni (1), Atlanta inclinata (1). 



Stat. P, June 30— July 1, 6.30 p.m.— 6.30 a.m. Salomon Atoll. 

 10 — fms. Atlanta peroni (3), Atlanta turriculata (1). 



Stat. Q, July 4—5, 7.15 p.m. — 7.15 a.m. Same position. 

 Surface. Firoloida kowalewskyi (1 $). 



Stat, a, Aug. 22, 1.43—2.30 p.m. Mauritius. 



25 — fms. Pterotrachea (s. s.) sp. (1 ?), Firoloida kowalewskyi (4 $?). 

 50 — fms. Firoloida koivaleivskyi (2, $, ?). 



Stat, c, Aug. 22, 4.40 — 5.20 p.m. Same position. 

 200 — fms. Firoloida kowalewskyi (1 $). 

 275 — fms. Firoloida koivaleivskyi (1 $). 



Stat, k, Sept. 2, 10.30—11.20 a.m. Nazareth Bank. 

 300 — fms. Pterotrachea (s.s.) sp. (1 ?). 



Stat. 1, Sept. 2, 11.45 — 12.30 a.m. Same position. 

 250 — fms. Pterotrachea (s. s.) scutata (1 ?). 



Stat, n, Sept. 8, hour? N. of N. Saya de Malha Bank. 



Surface. Protatlanta souleyeti (14), Atlanta lesueuri (21), Atlanta infiata (132). 



Stat, q, Sept. 27, 7—9.30 a.m. S. by E. of Farquhar. 



1000 — fms. Atlanta peroni (2), Atlanta inclinata (2). 



* I.e. fi». 67. Here Vayssiere depicted the visceral nucleus, and the neighbouring parts, of the female 

 of F. desmaresti. 



t Within brackets is indicated the number of specimens caught. 



SECOND SERIES— ZOOLOGY, VOL. XIV. 24 



