THE OSTRACODA. 



277 



Bisoayan means being' just too short foi* a continuation of the Mediterranean means. 

 The two sets of oliservations give six stages at least for this species. 



CONCHCECIA ZETESIOS, sp. n. 



Only two stages were observed, both of which were female. Their measurements 



were : — 



2. 



Stage? I. I 7 

 Mean, 3-42. i 5 



Stage? II. 

 Mean, 



mm. 

 2-6 

 2-5 

 2-4 

 2-3 



1, l-o. J 

 Table Q. — Total specimens measured : 20 ? , 



Halocypris globosa, Claus. 



As regards the males, the lengths of my single specimen (21 mm.) and of Dr. Miiller's 

 (2'25 mm.) seem to indicate that they belong to the oldest stage, if compared with the 

 mean of females at Stasje I. 



Fig. J. 



100 90 80 ;0 60 50 



I-*> 



The largest females of the ' Research ' collections (2-1 to 2-8 mm.) were slightly smaller 

 than those recorded by Miiller from the ' Valdivia ' expedition (26 to 30 mm.) ; l)ut 



45* 



