264 



W. J. CROZIER 



and length (fig. 4), and between weight and length (fig. 14). 

 This point of view is supported by the results of mating experi- 

 ments w^ith starved animals, tests which are discussed in a 

 subsequent section. 



C. The distance of the genital papilla from the anterior end 

 of the animal (mouth), and its height above the ventral surface 

 of the foot, were also measured in a number of specimens. These 



8 



10 



le 



4- 



crn5. 



Leo^f^. 



Fig. 14 Showing the irregular relation between length and weightj^in freshly 

 collected individuals, which cannot be due to irregularities in the weight of the 

 stomach contents. 



figures are neither numerous enough nor sufficiently homo- 

 geneous to enable cross-correlation indices to be calculated; 

 moreover, such calculations w^ould be unnecessary for present 

 purposes. The data obtained in this connection are detailed 

 on a subsequent page; they are intended to give an idea of 

 the topographical position of the genital papilla in nudibranchs of 

 different sizes. The important point is that the genital papilla 



