Phreatoicoides. 1 33 



the distal margin is produced obliquely downward from the 

 hinder to the front margin, and overlaps the junction with the 

 carpus. The carpus is also subtriangular, the base of which forms 

 the distal margin. The posterior margin is fringed with setje. 

 The propodos is oblong, in the proportion of its length being 

 two and a half times the width, and its length measures two and 

 a half times that of the two previous joints combined. The 

 joint attenuates somewhat distally, and the anterior border in 

 side view is curved from the proximal to the distal extremity, and 

 is clothed in three places with a few long sette. The posterior 

 border is straight and forms a narrow palm, against which the 

 dactylos, which articulates at the distal extremity of this border, 

 can shut. Along the sides of the palm is a fringe of spiniform 

 setae. The dactylos is nearly as long as the propodos, slightly 

 curved inwards, with the margin entire, and terminating in a 

 strong sharp point. Along its inner margin are a nuujher of 

 very long filamentous seta?, and on the outer surface, near tlie 

 distal extremity, is a small tuft of short sensory hairs, similar to 

 form C previously described, and more proximaliy a few short 

 setse. 



Hymeftial form of pereiopod of male. — The only marked 

 difference in the hymenial form is in the propodos and dactylos. 

 Fig. 10 is a drawing of the inner surface of a smaller male than 

 the preceding one, viz., 9 mm. The propodos will be seen to 

 be much wider ; the palm is slightly concave and there is a 

 conical projection at its proximal end tipped with sensory hairs ; 

 there are no setae on the convex anterior niargin except at the 

 extreme distal end. The dactylos is longer and more curved than 

 in the normal form and tipped with a greater number of sensory 

 hairs. 



Second, Third, and Fourth Pereiopods. — The second, third, and 

 fourth pereiopods are similar to each other (Fig. 1 1 is a drawing 

 of the outer surface of the third and will sufficiently illustrate the 

 other two). The basos and ischios are similar to the first 

 pereiopod. The meros is sub-equal. The carpus is oblong and 

 almost as long as the meros ; the posterior margin bears a series 

 of eight long stout spines, pointing distally, and from the antero- 

 distal angle there is a tuft of long sette like those in a similar 

 position on the meros. 



2.\ 



