SYSTEMATIC AND BIOLOGICAL ACCOUNT 105 



reported on a species under the name G. biloba Sars from the Malaysian area, but their figure is not 

 good. Through the courtesy of Prof. Dr H. Engel, Director of the Zoologisch Museum, Amsterdam, 

 I was able to re-examine a little tube full of 'Siboga' specimens labelled ' 119 E 1 Sulculeolaria biloba 

 Sars '. These must be Lens & van Riemsdijk's specimens, now in alcohol, from ' Siboga ' Station 1 17 A, 

 lat. i° 15' N., 123 37' E. I could not recognize the figured specimen, but picked out seven anterior 

 and seven posterior nectophores that were the best preserved. Most of the specimens were in very 

 poor shape. The seven posterior nectophores had bilobed lamellae with a 'sigmoid curve'. One or 

 two were preserved well enough for me to be able to decide that though small specimens they corre- 

 sponded sufficiently well with those of G. biloba from the North Atlantic. I am satisfied that the 



C rod lat 



C.com 



iQmm 



Cradd 



Som 



Text-fig. 49. Sulculeolaria biloba. Three anterior nectophores taken by M.B.A. Plymouth in 



Celtic Sea, July 1937. x 4-4- 



seven anterior nectophores that I selected represented G. biloba Sars, though they were in poor 

 condition. The somatocysts were not easily visible, but I think that I could just detect in each the 

 characteristic arrangement of the somatocyst and the ' basal pit ' for the proximal end of the stem, 

 such as I have described. These seven anterior and seven posterior selected nectophores could hardly 

 represent any other species known to me. 'Discovery II ' took specimens at Stations 1567 and 1568 

 as reported above (p. 102) and very recently thirteen anterior and nineteen posterior nectophores 

 were sorted out from a surface-haul from 'Discovery II' Station 2688 on the '90° E.' line of stations 

 in lat. 20 19' S. The average length of the nectosac of these anterior nectophores is 8-8 mm. I am 

 quite satisfied therefore that the Atlantic species Sulculeolaria biloba occurs in the Indian as well as 

 the Pacific Ocean. It is possible that the North Atlantic specimens reach a greater size than the 

 tropical Indian, but we have not sufficient data yet to be able to judge. 



14 



