Appendix. 



In this appendix are given a series of correlation tables, setting out in full the data 

 for determining the effect of Sacculina neglecta on hiachus scorpio. All the measurements are 

 given in millimeters, and all the tables are arranged in the same way. The following expla- 

 nation of the arrangement of Table 1 can be applied to all. In the extreme left hand vertical 

 column the figures 9 to 19 refer to carapace length in millimeters. In the top horizontal 

 column the figures 5 — 19 refer to abdominal length in millimeters. The figures in the 

 interior of the table give the numbers of crabs found with each particular measurement of 

 carapace and abdomen indicated in the left hand vertical and top horizontal column. Thus 

 there were 26 crabs measuring 13 mm in abdominal length and 14 mm in carapace length. 

 In the right hand vertical column and the bottom horizontal column are given the total 

 number of crabs exhibiting each carapace length (vertical column) and each abdominal length 

 (horizontal column). In the extreme right hand corner is given the total number of crabs 

 used for making the table, viz. 295. 



Table 1. Uninfected females. Abdominal length. 

 Abdominal length in mm. 



