Galty Marine Laboratory^ St. Andreics. 121. 



cirropLore supporting it anteriorly is short and broad, the 

 hase of the cirrus being constricted in the posterior segments 

 as it approaches it, whereas in the anterior segments the low 

 broad cone formed by the cirrus shows this less prominently. 

 The distal extremity forms a blunt cone. This cirrus, as in 

 one or two other species of the genus, is proportionally large 

 in a lateral view of the foot, its cirrophore occupying about 

 half the vertical diameter of the foot, and it extends distally 

 much beyond the other divisions. The setigerous process is 

 bluntly conical, the tip being double, with a bite in the 

 middle, and the bristle-tuft is sujjported by a pale spine, the 

 tip of which does not project beyond the surface, though it 

 almost touches it. The bristles (PI, V. figs. 4 & 5) are 

 translucent, with a distal curvature of the shaft, and form a 

 broad fan anteriorly, with the convexity of the shaft directed 

 upward. The terminal piece is jjcrhaps slightly longer than 

 in Efeone picta, and forms a translucent tapering serrated 

 blade. The shaft is dilated at its termination above the 

 curvature, and carries a long tapering spur, the point of 

 which curves toward the serrated or upper border of the 

 terminal blade : and on the same side (that is, with the 

 serrated edge of the blade to the left) is a shorter spur and 

 a series of diminishing serrations on the free edge below it. 

 The bristle thus differs from that of Eteone picta, especially 

 in the proportionally longer hook at the end of the shaft 

 and the more coarsely spiuous edge below the base of the 

 larger process. In E. jjicta tlie large hook is shorter, 

 stronger, and more boldly curved, and the lateral hook 

 smaller. In E. arc/fca the great hook is likewise shorter and 

 stouter. In E. lentiyera the comparatively small though 

 stout main hook is only a little larger than the secondary. 

 In E. spetsheryensis the secondary hook is long and sharp 

 and runs parallel to the larger hook, which is more or less 

 straight. In the posterior region of the body both spines 

 are well developed, and some have a tendency to curve at 

 the tip. In E.jjusilla the disproportion between the two 

 hooks or spines is great, the smaller, however, being slender 

 and sharp. In some small spines abut on the larger toward 

 the dorsal edge of the terminal blade — that is, the side 

 opposite the serrated edge. 'i"he blade, moreover, is jjcrhaps 

 more distinctly bellied iuferiorly. 



The ventral cirrus anteriorly has the shape of a truncated 

 cone, the tip of which projects beyond the setigerous lobe. 

 In the posterior third this cirrus diminishes in bulk and its 

 tip is nearly in a line with the setigerous process, its ventral 

 outline presenting a swelling or hump, apparently an indica- 



