I. 'oe. 48 



All the abdominal somites are dorsally rounded with the 

 exception of the fourth, which shows traces of a dorsal carina, 

 and is produced posteriorly to a short spinc^ which overhangs 

 the succeeding somite. The sixth is less than tw^o-thirds the 

 length of the fifth and is more than half as deep as long. The 

 telson IS about half as long again as the last abdominal somite ; 

 it is dorsally sulcate and tapers to a narrow rounded apex 

 (fig. 2), armed with eight spines, of which the outer pair is 

 much the longest. 



The eyes are two-fifths as long as the antennal scale. The 

 rounded cornea is scarcely as wide as the stalk and is set 

 obliquely on it; it is quite devoid of black pigment, but it is 

 none the less distinctly facetted. The stalk is produced 

 anteriorly to a small tubercle on its inner dorsal aspect. The 

 antennular peduncle reaches to rather more than half the length 

 of the antennal scale. The ultimate joint is longer than the 

 penultimate ; both together are shorter than the basal segment, 

 which bears externally a lateral process, w^hich does not quite 

 reach to its distal end. The antennal scale is about three and 

 a half times as long as broad^ ; externally it is convex, and is 

 produced distally to a strong spine, which reaches beyond the 

 rather narrow apex of the lamellar portion. The basal joints 

 of the flagellum reach to about half the length of the scale. 



The mandibles, maxillae and maxillipedes are figured by 

 Smith (1884, pi. vi. figs. 2-7). The mandibles bear a palp 

 composed of two joints of approximately equal length. The 

 second maxillae, like those of Pasiphae, do not possess the 

 laciniae found in some other genera belonging to this family. 

 The first and second maxillipedes possess epipods, but no 

 exopods ; in the first pair the epipod is large and bilobed 

 and the rounded ultimate segment of the endo}X)d is little more 

 than one-third the length of the penultimate. The epipod of 

 the second pair is very small an^ rudimentary. The third 

 maxillipedes are provided with a small epipod and a long 

 exopod, which reaches to about half the length of tha penul- 

 timate segment. The two distal segments are together about 

 equal in length to the anti-penultimate. 



The first pair of pereiopods reaches beyond the antennal scale 

 by more than half the length of the propodus. The chela is 

 about half the length of the carapace and its dactylus is about 

 two-thirds the length of the palm. In the second pair 

 the merus is much longer, and is provided with a few spinules 

 on its inferior margin. The chela is much longer and more 

 slender and the dactylus is only a little shorter than the palm. 

 When stretched forward this pair of legs reaches beyond the 

 apex of the antennal scale by five-sixths the length of the 

 chela. The third pair of pereiopods is very slender and 

 reaches beyond the apex of the eyes. The ischium is nearly 

 half the length of the propodus, the latter being less than tw^o- 

 thirds as long as the merus ; both carpus and dactylus are 



1 Smith states that the antennal scale is three times as long as broad ; 

 his description was drawn up from large specimens in which the antennsl 

 scale (and uropods) are wider than in the smaller Irish examples. 



