Ostracoda 11 



lamellar and fringed with fine spinules (see fig. 9) ; palp rather narrow and only 

 sparingly setiferous, but armed on the tip with a coarse, claw-like spines ; vibra- 

 tory plate small and edged with three or four slender setae. Maxillae (fig. 10) 

 provided at the base with a well-developed, semilunar, vibratory plate; palp 

 very much produced with the proximal joint narrow-fusiform in shape; distal 

 joint short and armed on the tip with two subequal, clawlike spine (see fig. 11). 

 Legs (fig. 12) comparatively short and robust, only slightly increasing in length 

 posteriorly, with the basal part almost bare; first joint of the terminal part 

 rather narrow and of somewhat different length on the several legs; the two 

 outer joints in all of these firmly connected, to form a somewhat dilated hand, 

 against which the strongly curved, nail-shaped apical claw or dactylus is seen 

 to impinge, the latter issuing with a broad compressed base and terminating in 

 a sharp, upturned point, being moreover armed inside with five long and slender, 

 likewise upturned spinules (see fig. 13). Caudal lamellae (comp. fig. 3) much 

 reduced, but not clearly made out. 



Colour not yet ascertained. 



Length of adult female • 45 mm. 



Male. — Unknown. 



Remarks. — The above-described remarkable ostracod is easily distinguished 

 from any of the hitherto recorded Cytheridae, both as to the general shape of 

 the shell and to the structure of the several appendages, in particular that of 

 the legs. It is one of the smallest known forms, and indeed the anatomical 

 examination has therefore been attended with no small difficulties. 



OccTJERENCE. — Three specimens of this interesting form were among the 

 Ostracoda sent to me by Mr. F. Johansen. They were contained in a separate 

 little tube labelled "Cythere, Canada," the exact locality, date and collector 

 not being known. (Old museum specimen, perhaps collected by J. B. Tyrrell.) 



