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BISCAYAN PLANKTON. 



Part VIII.— THE CEPHALOPODA. 



By William E. Hoyle, Director of the Manchester Museum. 

 {Communicated by Dr. G. Herbert Fowler, F.L.S.) 



(With. 3 Text-figures.) 



Eead 7th Juue, 1906. 



The small collection of Cephalopods entrusted to me for examination by my friend 

 Dr. Eowler consisted entirely of young specimens, many too young to enable the species 

 to be determined witb certainty, although the state of preservation was excellent. 



Most of the examples I have submitted to my friend Dr. Pfeffer, of Hamburg, who 

 has made a special study of these immature forms, and I am greatly indebted to him for 

 giving me the benefit of his opinion. 



The numbers preceded by " H " in square brackets refer to my own register. 



Eledonella sp. 



Locality : 32 i, July 21, lat. 47° N., long. T 38' W. ; depth, surface to 100 fathoms ; 

 temperature, 52° to 64° E. ; one specimen [H 1066]. 



This specimen is undoubtedly the young of some species of Eledonella or possibly 

 Jajietella ; the only noteworthy peculiarity it presents is that the arms of the second 

 pair are a little longer than those of the third. The suckers and the circumoral lip are 

 very dark, almost black. In the centre of the transparent arm is seen a slender black 



Fitr. 1. 



thread, upon which is a fusiform swelling under each sucker (see fig. 1); this is 

 presumably the nerve-cord with a series of ganglia. 



The present specimen extends the distribution of the genus to the Eastern Atlantic ; 



SECOND SERIES. — ZOOLOGY, VOL. X. 28 



