16 G. O. Sars. 



slender, tapering terminal part. The basal part is strengthened 

 by several chitinous stripes, and seems to consist of 2 

 imperfectly defined joints, forming together a geniculate 

 bend, from which a few small bristles are seen to issue. 

 The terminal part is divided into 4 well-defined joints, the 

 1st of which is much the largest and about as long as the 

 2 succeeding ones combined. It contains several strong 

 muscles joining the very movable outer part of the leg, and 

 carries at the end anteriorly a simple bristle. The 2 next 

 joints are firmly connected, though defined by a distinct 

 transverse suture, and have each at the end anteriorly a 

 similar bristle to that of the 1st joint. The last joint is 

 very small, and carries on the tip an exceedingly long and 

 slender, anteriorly curving claw, at the base of which 2 

 small bristles are secured. 



The posterior legs (fig. 10) are considerably more slender 

 than the anterior, and are apparently only composed of 4 

 joints, though a short basal joint may probably exist The 1st 

 joint is somewhat bent in the middle, and carries 3 slender 

 setæ, 2 of which issue from near the end, whereas the 3rd 

 is attached to the middle of the lower edge. The 2nd joint, 

 which forms with the 1st a strong elbow-like bend, is very 

 much elongated and narrow cylindric in form, having a 

 single slender bristle at the end posteriorly. The 3rd joint 

 is much shorter and also narrower than the second, being 

 somewhat constricted at the base. It carries, in the middle 

 of the posterior edge, a slender bristle, and juts out at the 

 end to a short, thumb-like projection. The last joint is 

 extremely small, and is produced to a strongly-curved claw 

 extending backwards, and having at its base a slender bristle 

 pointing in the opposite direction. The function of these 

 legs is apparently that of cleansing the inner cavity of the 



