222 BB. J. Q. DE MAN ON THE PODOPHTHALMOUS 



Folyonyx, and it seems almost a certainty that Haswell's species 

 is also a representative of this subgenus. It appears to be dis- 

 tinguished from P, transversa by the upper surface of the carapace 

 not being liaeolate on its posterior half, by the protogastric lobes 

 being not at all prominent, by the shape of the front, by the dis- 

 tinctly crested lateral margins, by the absence of a conical tooth 

 at the base of the immobile finger of the hands, and probably by 

 other characters, which will become manifest when both species 

 are compared with one another. 



P. Euphrosyne belongs to that small number of species ia which 

 the cephalothorax is much broader than long, the proportion of the 

 breadth to the length being the same as in P. transversa. The 

 upper surface is very convex longitudinally, and the lateral regions 

 are very declivous towards the lateral margins, but the middle of 

 the cephalothorax is transversely flattened. The regions are 

 faintly indicated, and the upper surface is smooth and glabrous, 

 except near the lateral margins, which are densely hairy. The 

 front is rather narrow, measuring only a fourth of the breadth of 

 the cephalothorax ; it presents a much deflexed, scarcely promi- 

 nent, subacute, median lobe, which projects a little more forward, 

 i. e. more downwards, than the rounded lateral angles, which are 

 formed by the internal angles of the orbits. The front is some- 

 what hairy above. The fronto-orbital margin therefore resembles 

 somewhat that of P. {Folyonyx) ohesula, "White (Miers, Zoology 

 of the Voyage of H.M.S. ' Alert,' 1884, pi. xxix. fig. D), but it 

 is comparatively broader in that species. The orbits are compara- 

 tively small, like the eyes themselyes ; the external angles of the 

 orbits are rounded or obtuse, not at all prominent, and the fronto- 

 orbital margin passes continuously on either side into the lateral 

 margins, which are distinctly carinate and prolonged backwards 

 about to the posterior third. At some distance from the orbits 

 the carinate lateral margins are interrupted by the lateral portions 

 of the cervical suture ; but no epibranchial tooth is found at that 

 interruption. The posterior margin of the cephalothorax is 

 slightly concave. The inflected sides of the carapace close to and 

 below and behind the lateral margins are marked with some oblique 

 rugose lines. The external antennae are about twice as long as 

 the length of the cephalothorax ; the first exposed joint is un- 

 armed, the second is a little longer and thinner than the first, 

 and the third is the smallest of all, being only half as long as the 

 second. The external maxillipeds have a quite smooth, glabrous. 



