ENHYDROSOMA. 99 



toothed, the palp elongated, its first and second joints 

 each bearing one strong plumose seta, the last joint 

 four apical setae. The second foot-jaw (fig. 18) is well 

 developed, its terminal claw long and slender. Both 

 branches of the first pair of feet (PI. LXXXI, fig. 12) 

 have two very long terminal setae, which bear near 

 their apices three or four lash-like cilia. In the three 

 following pairs the inner branch is very small and has 

 three plumose terminal setae ; the outer branch is of 

 moderate size, and has three plumose setae at the 

 apex, while the marginal spines are elongated, slender, 

 and strongly pectinate. The fifth pair in the female 

 (PL LXXXII, fig. 19) has the first joint very broad 

 and short, the internal segment fringed with five stout 

 plumose setae ; the second or outer joint is ovate, 

 crenulated on the external margin, bearing on the 

 inner margin two stout setae, and at the apex a short, 

 broad spine. In the male (PL LXXXI, fig. 14) the fifth 

 foot is smaller and is incompletely divided into two 

 laminae, each of which bears four or five plumose setae. 

 The caudal laminae are broadly ovate (fig. 15) and are 

 provided with five minute marginal setae. The animal 

 when seen from the side (PL LXXXII, fig. 11) is 

 arcuate, the head and tail being sharply bent upon the 

 body ; the integument glabrous. Length aVth of an 

 inch (*67 mm.). 



I have not been able to identify this with either of 

 the two species (E. curticauda and E. longicaudaia) 

 described by M. Boeck, the fifth pair of feet being 

 apparently quite different. E. cnrvata, though occur- 

 ring pretty plentifully in several widely separated 



