studies on marine Ostracods 



127 



expected to yield a satisfactory mean; the mean is too low to fit with the ratios between 

 Stages III. and II. : 1,08 x 1,30 = 1,40; 1,40 x 1,30 = 1,82" (p. 275). 



Conchoecia procera G. W. MOller. 



Stage II. 



StaRe III. 

 Mean 0,9 



Stage IV. ?Stage \'. 



Mi-aii 0,6'i Mean 0..t 



Number of ? mea.sured: 

 Length in mm. : 

 Number of rj measured: 



Total specimens measured: 85 ? + 62 o. 



„Taking the females first: —0,64 x 1,36 = 0,87; 0,87 x 1,36 = 1,18. On morpho- 

 logical grounds the specimen at 0,5 appeared to belong to an earlier stage than those at 0,6 

 and 0,7; and by the same growth-factor this stage would have a mean at 0,47. — In the males 

 there is an overlap of the Stages II. and III. at 1,0 ... . the numbers are too small for 

 accuracy: 0,7 x 1,26 = 0,88; 0,88 x 1,26 = 1,10." (p. 271). 



Conchoecia Haddoni G. S. Brady and A. M. NORMAN. 



stage I. 

 Mean 2,72. 



Stvge II. 

 Mean 1,6*>. 



Stage m. 

 Mean 1,1. 



Stage \\. 



Mean 0,66. 



? Stage V. 

 .Mean 0.4. 



Leiiglli in mm.: 

 \iinil)ei' of 5 measured: 



:!.n 



2,'J 

 1 



2.8 



3 



Total specimens measured: 37 -f ?3 = 40$. 



,,In the females the usual proportions between the means appear, the second place of 

 tlecimals being somewhat vague, presumably owing to the paucity of specimens. Thus, 

 0,62 X 1,64 = 1,01; 1,01 X 1,64 = 1,656; 1,66 X 1,64 = 2,72. The observed mean of 0,6(i 

 for Stage IV. is perhaps too high, and the growth-factor employed a little larger than tlie 

 true factor" (p. 265). 



Only 5 males were measured, representing two different stages. 



Conchoecia hyalofhyUum C. Claus. 



Stage I. 



Stage II. 



Alean I.5R. 



Stage III. 

 Mean I.n:. 



\umber of % measured: 

 Length in mm.: 

 Number of (J measured; 



stage I. 

 Mean 2,3. 



.Sliige II. 

 .Mean 1.5. 



Stage III. 

 Mean l.OS. 



Stage IV. 

 Mean U,T. 



Total specimens measured: 62+ ?l 5 + 43 J. 



