1892.] Correlated Variations in Crang-on vulgaris. 



17 



Table XIII. — Mean Length of Sixth Abdominal Tergum for observed 

 Values of Total Carapace Length. (Southport: 800 individuals.) 



M c = 248 31; Q c = 3-96. M Tvi = 143-56; Q Tvi = 3 20. 



Length of c. 



Mean associated 



Length of Tvi when 



Difference 



length of Tvi. 



r 0-05. 



observed, Tvi. 



259 



145 -57 



143-99 



+ 1-58 



258 



140-75 



143 -95 



-3-20 



257 



144-25 



143 -91 



+ 0-34 



256 



142 -74 



143*87 



-1-13 



255 



142 -84 



143 83 



-0-99 



254 



143 '92 



143 • 79 



+ 0-13 



253 



143 41 



143 75 



-0-34 



252 



144-54 



143 -71 



+ 0-83 



251 



144-97 



143 67 



+ 1-30 



250 



143 -26 



143 63 



-0-37 



249 



143*23 



143 59 



-0 36 



248 



143 -56 



143 55 



+ 0-01 



2.47 



143-67 



143-51 



+ 0-16 





143-90 



143 -47 



+ 0-43 





144-16 



143 -43 



+ 73 



2. 



142-57 



143 -39 



-0-82 



243 



143 -88 



143 -35 



+ 0-33 



242 



142 -48 



143 -30 



-0-82 



241 



143 -41 



143 -26 



+ 0-15 



240 



I 



142 -33 



143 22 



-0-89 



Table XIY. — Mean Value of Total Carapace Length for observed 

 Lengths of Sixth Abdominal Tergum. (Southport : 800 indi- 

 viduals.) 



Length of Tvi. 



Mean associated 

 length of c. 



Length of c when 

 r = 005. 



Difference 

 observed, c. 



150 



249 -15 



248 -71 



+ 0-34 



149 



248-74 



248 -65 



+ 09 



14S 



247 -44 



248 -59 



-1 05 



147 



247 -53 



248-52 



-0-99 



146 



249 -47 



248 -46 



+ 1 01 



145 



24S -71 



248 -38 



+ 33 



144 



247 -40 



248 -34 



-0'94 



143 



247 -76 



248-28 



-0 52 



142 



247 -35 



248 21 



-0-86 



141 



247-26 



248-14 



-0-88 



140 



249-14 



248-09 



+ 1-05 



139 



245 -51 



248 -03 



-2 52 



138 



248-69 



247-95 



+ 0-74 



137 



246 81 



247 -90 



-1-09 



VOL. LI. 







C 



