GLOIOPOTE S — CRESSET 



11 



Pacific reported herein clearly shows theni to be distinct species. 

 This would account for some of the variation cited by these authors. 

 I have critically examined collections of each of these two species in 

 order to determine the extent of intraspeciiic variation. 



In one particularly large sample of G. huttoni taken from T. audax 

 off Cliile (Cruise 14, R. V. Anton Bruun, sta. 565), 50 adult females 

 were randomly selected. The distribution of individuals throughout 

 the size ranore is as follows: 



The body of the animal was divided into 5 regions; cephalon, leg 4 

 segment, genital segment, abdomen, and caudal ramus. Each of 

 these regions was measured along its dorsal anterior-posterior median 

 axis, and the percentage of the total body length that each comprised 

 was determined. The results of these measurements are as follows: 



percent of total 



length 

 range 



cephalon 



48.4 

 44.5-51.0 



leg 4 seg. 



7.5 

 5.4-9.8 



gen. seg. 



15.6 

 10.8-22.3 



abdmnen 



20.0 

 17.4^25.0 



caudal ramus 



8.5 

 7.2-10.0 



These same proportions in individuals in the lower, middle, and upper 

 thirds of the total length range were considered separately to determine 

 the correlation, if any, between the total length and the relative 

 component lengths. These results are as follows: 



The figures above indicate that the cephalon becomes proportionately 

 shorter with increased total length and the genital segment propor- 

 tionately longer. This change may have some relationship to the 

 production and development of eggs within the body of the animal. 

 Eggs are produced within the cephalon and migrate via the oviducts 

 to the genital segment, where they are stored prior to release as egg 

 strings. It is not known how many times a single female will produce 



