398 ACHOLOE ASTERICQLA. 



alluded to by Claparede seem to be the result of compression. The tentacle is subulate, 

 with a few clavate cilia. The lateral tentacles are short and subulate, with a fewclavate 

 cilia. The palpi are smooth, rather short (in spirit). The tentacular cirri are also short, 

 with a few clavate cilia. Claparede observed that the dorsal base of the latter has a 

 band of vibratile cilia on its upper surface, and he considered that such was the homo- 

 logue of the branchial processes of the feet. 



Body sublinear, flattened, and ranging from one to two inches in length. It is 

 very little tapered in front — much more so posteriorly. The segmental eminence is 

 distinct, but no papilla is visible in the preparations. Dr. Carrington describes the 

 general aspect as peach-blossom or flesh coloured. 



Scales (Plate XXXIII, fig. 15) are forty-five pairs (Claparede 1 ), rounded or 

 in front somewhat reniform, apparently smooth, but having a series of minute papilla 

 along the anterior and inner border, and with finely branched nerves. They are rather 

 thin and translucent, and have a blackish belt round the border, the centre being pale. 

 In some the blackish belt is confined to the posterior and outer border. On the 

 anterior aspect of the pedicles for the scales is a band of vibratile cilia. 



Feet. — Only the spine remains in the preparations in the first foot, and Claparede 

 shows the same condition from life. In this respect it agrees with Malmgrenia 

 and Halosydna. 



The second foot has a few short dorsal bristles — slightly curved, and with a short 

 spinous region, which does not quite reach the smooth and pointed tip. The ventral 

 series are stout and somewhat short, with a distinct curvature at the upper part of the 

 shaft, and a short spinous region tapering from a basal enlargement to an acute and 

 slightly hooked tip. The spinous rows are well marked. The chief change in the third 

 foot is the increase in the strength of the ventral bristles, and in the more distinct hook 

 of the smooth extremity. A ciliated band occurs along the upper and anterior edge in 

 this and other anterior feet without elytra. 



The typical foot (Plate XXXI, fig. 4) in those segments which have cirri has a 

 T-shaped branchial process on the dorsum — figured by Claparede from life, and showing 

 a diverticulum of the intestine, and ova from the perivisceral chamber in the interior. Its 

 inferior surface is richly ciliated. Such a process may fairly be called branchial. The 

 foot is comparatively short, with a small dorsal papilla for the bristles, and a short ventral 

 division sloping from below upward to the spine, and slightly bifid at the tip — when viewed 

 from above. The dorsal bristles (Plate XLI, fig. 13) are short, somewhat curved, and little 

 tapered distally below the bare region at the tip, which is acute and slightly hooked. 

 The spinous rows are minute. The ventral bristles have long and strong shafts— the 

 middle exceeding the superior and inferior in bulk, a slight dilatation at the commence- 

 ment of the very short spinous region, and a smooth boldly marked sharp hook at the tip 

 (Plate XLI, fig. 14). The spinous rows gradually diminish from below upwards, and no 

 larger process occurs at the base of the hook, as in several forms. 



The dorsal cirri are comparatively short, apparently devoid of an enlargement below 

 the tips, and with a few clavate cilia. The ventral cirri are smooth, subulate, and 



1 Carrington says twenty pairs or more of white scales. 



