Sludies on marine Oslracods 



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. Mt'LLEH. 



StaRe II. 

 Mean l.U', 



Stugt' III. 

 Mean 0,9 



Stage I\'. 

 Mean 0.6 i 



?Stage W 

 Mean 0.5 



Number of ? measured: 

 Length in mm.: 

 Xnniber of ^J measured: 



Staofe II. 

 Mean l.Il 



Stage III. 

 Mean 0,9 



Stage 1\. 

 Mean 0.66 



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 HaMoni G. S. Brady and A. M. NORMAN. 



stage I. 

 Mean 2,72. 



stage U. Stage m. 

 Mean l,6l!. .Mean 1.1 



Stage IV. 

 Mean n.66. 



?St*ge V. 

 Mean 0,4. 



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



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

 decimals 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 0,66 

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

 true factor" (p. 265). 



Only 5 males were measured, representing two different stages. 



Conchoecia hyalofhyllum C. .ClauS. 



Stage I. 

 Mean 2.:! 



Stage II. 



Al.sin i.'.s. 



Slag.- III. 



M.-.ni l.'i- 



Number of ^ nieasinvd ; I 

 Length in mm.: j 2.5 



.\nmher of rj measured:; 



2.1 



8 

 1.7 



8 



1.1 l.o 



7 1 



Stage I. 

 Mean 2,3. 



Slagr II. 

 Mean 1,5. 



Total specimens measured: 62+ ?1 $ + 43 o. 



.<l.iK' 111. SUgc IV. 



Mean l.flti. M""> '>'•■ 



