DUBINa THE ' CHALLENaBR ' EXPEDITION. 89 



Cypridina (■?) ELONGATA, G. S. Brady. 

 1865. Cypridina elongata, G. S. Brady, he. cit. p. 386, pi. Ixii. figs. 9 a-d. 



Eespecting this species I am able to add nothing to the short description already 

 published. 



(?) Cypridina punctata, Dana. (Plate XVI. figs. 5-9.) 

 1852. Cypridina punctata, Dana, Crustacea of U.S. Exploring Exped. p. 1293, pi. ix. figs. 2 a, b. 



Three specimens only of a species closely similar to, if not identical with, Dana's 

 C. punctata were taken by the ' Challenger ' Expedition at some point, not accurately 

 noted, in the Eastern Archipelago. All the three were in very bad condition — many 

 of the limbs broken or absent. In no case have I been able to find the slightest trace 

 of the vermiform limb. 



Shell extremely thin and membranaceous : seen from the side (fig. 5) subovate, 

 greatest height in the middle and equal to somewhat more than half the length, dorsal 

 and ventral margins evenly arched, the dorsal having the larger curve ; anterior 

 extremity obliquely subtruncate, with a short wide beak, above which is a shallow 

 sinuation, subrostral sinus narrow ; posterior extremity produced below the middle 

 into a rather wide, obtusely angular process, which is continuous with the ventral 

 margin below, but is separated from the dorsal margin by an abrupt sinuation ; seen 

 from above the outline is ovate, with produced subacute extremities. The mandibular 

 foot terminates in three short, equal ungues (fig. 7), which are slightly swollen at their 

 bases ; there is also a single slender curved seta, considerably shorter than the ungues ; 

 the masticatory process (fig. 8) is slightly bifid at the apex. Caudal laminae (fig. 9) 

 having eight marginal ungues, the first three extremely small and weak, the rest 

 successively increasing in length to the last ; the fifth, sixth, and seventh ungues are 

 not articulated to the limb but are simply processes of it. Length of the shell 

 1"5 millim. 



Cypridina dan.e, G. S. Brady. (Plate XVI. fig. 24.) 

 1880. Cypridina dana, Br slAj, Report on the Ostracoda of the ' Challenger ' Expedition, p. 156, 

 pi. xxxvi. figs. 2 a-d. 



The head of the vermiform appendage, here figured, is peculiar, the upper portion 

 being massive, strongly curved, and armed with a series of marginal teeth ; the lower 

 portion much smaller, and consisting of a simple, almost rectangularly curved process, 

 wide at the base but slender beyond the middle. 



Cypridina (?) armata, n. sp. (Plate XV. figs. 20, 21.) 



Shell thin and membranaceous : seen from the side oblong, subovate, greatest height 

 situated in the middle and equal to two-thirds of the length; dorsal and ventral 



