THE OSTRACODA. 



267 



CONCHCECIA INEKMIS, ClaUS. 



The three specimens captured consisted of two males, 1-9 and 1-5 mm. ; and one 

 female, 2-0 mm. The smaller male had not developed secondary sexual characters 

 and was therefore presumably at Stage III. ; in this case Stage I., with a male mean 

 presumably aboiit 2'4 mm., has not yet been identified. 



CONCHCECIA LORICATA, ClaUS. 



It is rather curious that the earlier stages of loricata should have been so rarely 

 recognized in the ' Research ' collections. It is unlikely that some specimens in which 

 the lateral glands were invisible or inconspicuous were included with Stage II. of magna ; 

 a close re-investigation of very numerous specimens of the latter with this very object 

 failed to reveal more. As the specimens of adult loricata in the comparable epiplanktou 

 amounted only to 40, and those of magna Stage I. to 136, the penultimate stage of the 

 former is not likely to have been very numerous. On the other hand, if any specimens 

 of Stage IV. and earlier stoges were captured, they have probably been put with the 

 " A " larvse. 



The actual measurements were : — 



r 



Stage I., 

 Mean 



j8. 



-! 



Stage II. 

 Mean, 2-0. 



Stage III., 

 Mean, IS. 



1 



8 



19 



10 

 1 

 L 1 



2 



3 

 2 



i; 



mm. 

 2-8 

 2-7 

 2-6 

 2-5 

 2i 

 2-3 

 0-2 



2-1 

 2-0 

 1-9 

 1-8 

 1-7 

 1-6 



r4 



1-2 



^J 



Stage I. 

 Mean, 2-31. 



n 



1 I Stage II. 



1 I Mean, 175. 

 iJ 



I Stage III. 



^ J Mean, 1-2. 



Table I. — Total s|)ccin]ens measured: -19 ? + 13 cJ = 62. 

 The specimens at Stage III. are too few to give satisfactory groAvth-factors. 



SECOND SERIES. — ZOOLOGT, VOL' X. 



44 



