LEPIDOXOTITS CLAVA. 283 



blackish or slightly glistening dull leaden hue, or with more numerous black specks, 

 which posteriorly do not seem to be connected with papillge. The under surface is 

 smooth and iridescent, and has the opaque whitish patch of the umbilicus. In spirit 

 the anterior scales generally show a fold from the umbilicus to the external margin. 



The minute structure of the processes of the scales has been specially described and 

 figured by De Saint-Joseph, 1 who states that the tip is " scaled" and spinous. His 

 figure, indeed, is regularly and closely diced. So far as can be observed in the British 

 specimens, it is the tip and neighbouring part of the capstan-like column of the process 

 of the scale which is thus covered, as recently described and figured. 3 



Feet. — On the dorsum of the first foot is a minute tuft of tapered serrate bristles 

 (Plate XXXVII, fig. 14), and a single large spine which penetrates the skin beneath 

 the former. Prof. Bourne speaks of four bristles being borne by each division. This 

 is probably a misprint, as his figure differs. 



The second foot diverges from that of L. squamatus in having its comparatively large 

 ventral cirrus directed more distinctly inwards and forwards, in the smoother foot and 

 the more translucent bristles. Moreover, while the dorsal series more or less correspond 

 at first sight, yet the character of the serrations slightly differs from those of L. squa- 

 matus, being somewhat shorter and finer, and the tips of the bristles are more tapered. 

 The ventral bristles of L. clava again differ in having their long tips spinous to the apex, 

 whereas in L. squamatus the spinous tips are shorter, the tip is bare, and in some slightly 

 hooked. 



In the third bristled foot (the second of some authors) the dorsal bristles are less 

 gradually tapered than in L. squamatus, while the ventral series have longer spinous 

 regions bare in the upper at the tip— which is more slender than in L. squamatus; indeed, 

 the whole bristle is more slender than in the latter species, and the rows of spines longer. 

 Both dorsal and ventral cirri, moreover, are different, being proportionally larger and 

 more bulbous below the filiform extremity. 



In the fully-formed foot (e.g. the tenth, Plate XLII, fig. 26) the papilla for the 

 dorsal bristles is more prominent than in L. squamatus, and has a distinct black bar in 

 front, and the bristles are somewhat shorter and more curved (Plate XXXVII, fig. 15). 

 The tips of the ventral bristles are shorter, the curve more pronounced (Plate XXXVII, 

 fig. 11), and the bare portion shorter. The stronger and larger hooked tip in L. squa- 

 matus is a characteristic feature. The segmental papilla is visible on the eighth bristled 

 foot as in L. squamatus, and is continued to the last foot- 

 In the terminal foot the dorsal bristles are shorter and more curved than in L. squa- 

 matus, a feature present throughout the body. The ventral bristles have the curvature of 

 the shorter tip more pronounced than in L. squamatus. In both species these bristles 

 preserve great strength. 



A marked difference between the species is the diminished size of the body and last 

 feet in L. squamatus, contrasted with the comparatively large size of all the parts in this 

 region in L. clava. 



1 Op. cit., Aug., 1898, p. 229, f. 4, &o. 



2 ' Ann. Nat. Hist./ 1898, p. 108, pi. ii. 



