660 Bea.dy and Norman — Monograph of the Marine and Freshioater Ostracoda 



one on the side near the extremity; third joint sub-triangular, a single seta on 

 each margin; fourth with two distal setse on inner, and four and the sensory 

 organ on the outer margin, the sensory seta long-ringed, the filamentous processes 

 confined to the lower third of its entire length ; fifth with one setas ; sixth with 

 four porrected setse, as well as the greatly developed pair of setae which are 

 reflexed upon the limb. The antennae have the third joint of the swimming 

 branch fully twice the length of the second, the swimming setae are eleven in 

 number, the secondary appendage is, as usual in the male sex, a well-developed 

 grasping organ, the basal joint rather longer than broad, with three setae, the 

 second joint very long, with two spine- formed setae on the middle of the inner 

 face, the third joint as long as the second, and reflexed on it. 



The mandible is without masticating lobes or spines; first joint of palp with 

 seven long, and a few short setae on the inner margin, and one median and two 

 distant setae on the outer margin, the laminar appendage small, not half the 

 length of the following joint ; second joint with a fascicle of five setae on the 

 middle of inner margin ; third joint of nearly equal breadth throughout, its 

 inner margin with a pair of setae near, and four setae at the extremity, outer 

 margin with one or two pairs of sliorter setae near the middle, succeeded by a pair 

 of very long-ringed setae ; last joint with two ungues, one of which is very long, 

 above which is a spine and below a seta; the second maxillae have the outer 

 member of the palp bearing two plumose setae of unusual size for that position ; 

 on the limb itself teeth seem to be absent, and their place taken by lanciform 

 spines. The penultimate limbs have their first lobe furnished with two setae, 

 the second with one lateral and six distal, the third with one lateral and seven 

 distal, while the fourth lobe is entirely coalesced with the vibratory lamina, but 

 distinguishable by its four smaller and differently constructed setae, the vibratory 

 lamina itself having eight large, plumose, backwardly curving setae. Vermiform 

 limb with few setae. Caudal laminae narrow, with ten ungues, the upper six small 

 and of uniform size, the seventh much larger, the eighth small as the first six, 

 the ninth and tenth long and slender, ciliated on their edge, as is also the seventh. 

 In all the specimens examined a smaller unguis is, as described, interposed 

 between the second and fourth from the end. We have only seen the male 

 of this species. 



Males only procured from tow-net gatherings when at the Zoological Station, 

 Naples, in 1887 (A. M. N.). 



[Our description of this species was written before the publication of Herr 

 G. W. Miiller's monograph, in which it is by a coincidence figured and described 

 under the specific name which we had ourselves assigned to it. Miiller, however, 

 takes the species as the type of a new genus — Pseudophilomedes — distinguished 

 from Philomedes by the structure of the first and second pairs of maxillae. It 



