NARRATIVE OF THE CRUISE. 



151 



light on the morphological value of different parts of the animal. The male is only known 

 in one species (Nebalia geoffroyi), in which it is but little more slender than the female, 

 and has the first pair of antennae only slightly larger and the second pair much longer than 





Flo. 63, A. —Female of Xebalia {Paranebalia) longipes, Suhm, magnified about 20 diameters, from a drawing by von Sulim. a, first 

 antenna ; b, second antenna ; Oc, eye ; It, rostrum ; M, stomach ; D, intestine ; F, furcal process. 



is the case in the female. In this Bermudian Nebalia (Paranebalia), which differs in many 

 ways from any Nebalia hitherto known, the male is only half the size of the female, and has 

 the first pair of antennae changed into strong prehensile organs, whilst the second pair 



Fi<;. 63, B. — Male of the same, magnified about 35 diameter*.. Letters as in A. d, palp of the first maxilla (" Putzfuss," 



Clans) ; g, ductus ejaculatorius. 



does not differ from that of the female. In both cases the genital opening is at the base 

 of the eighth pair of pectoral limbs. These differences in the males of the two species arc 

 so considerable that, according to the principles adopted for the classification of other 

 groups, for example the Copepods, it would be necessary to make another genus of this 



