.72 



DE. G. H. FOWLER— BISCAY AN PLANKTON 



level with or behind the septum, the posterior fin is rather more on the trunk than on 

 the tail ; the teeth are shorter and thicker, and less closely appressed together ; the 

 numbers of posterior teeth are much smaller for the length. 



In genex'al characters and in the numbers of the armature they stand closest to 

 plcmctonis, Steinhaus, except for the fact that the anterior fin is rather wider posteriorly 

 and a slight collarette is present : of the detailed characters of the jaws and teeth in 

 plancionis we have no information. 



1 Aida's neglecta is almost certainly bipunctata, Quoy et Gaim., and his hipimctata = Bedoti, Beraneck. 



It is not worth while to enter into detailed differences between all these species * and 

 my specimens, but the following rough points will serve to differentiate them : — They 

 are stronger in build {i. e. stronger longitudinal muscles and smaller lateral fields) than 

 furcata, much broader and less pin -shaped than hipimctata. The description and figure 

 of neglecta are so generalised and give so little detail that it is impossible to say whether 

 this, if a " good " species, has any relation to our specimens. From regularis they are 

 readily differentiated by general outline {cf. Aida's fig. 17). They are too stoutly biiilt 



* It is hard to believe that all the above are separate species. It is even harder to reduce their number, since most 

 of them are quite insufficiently described, and the figures (when they exist) are generally as inadequate as the 

 descriptions. 



