41 



A form reaching the length of 150 mm., or more, and having 

 a breadth of 6 — 7 mm. at its widest part over the bristles. 



The head is deeply bilobed, and carries three rather short 

 stumpy tentacles, with a pale patch at the tip, the rest being of 

 the brownish hue of the head. The median is the longer, and 

 in the preparations its tip just touches the central fissure in 

 front. External to the base of the outer tentacle, is an eye on 

 each side, with a well-marked corneal thickening. The nuchal 

 collar covers the back part of the head, concealing a median 

 band, passing to the first segment, and a lateral junction at each 

 outer tentacle, the margin of the central curving outward to the 

 lateral. 



The body is very little tapered in front, and the diminution 

 towards the tail is also gentle. The latter terminates in two 

 short subulate styles beneath the vent. It is pale brownish 

 anteriorly, minutely dotted with pale specks, but in the pre- 

 parations these disappear from more than the posterior half. 

 Some of the anterior segments ventrally show the same specks 

 on the brownish ground-colour, but the rest of the surface is of 

 a uniform pale brown, variegated only by the reddish brown 

 pad beneath the ventral cirrus. 



The proboscis has maxilhv with rather short blunt blades in 

 front, the posterior process narrowing to a notch, dilating, and 

 again narrowing to form a lozenge-shaped appendage po,s- 

 teriorly. The maxilke have three strong, blunt teeth in front. 

 The notches on theazygos plate are indistinct, and there are few 

 (about two) on the left anterior plate — beyond which is a small 

 •accessory plate. The right anterior curved plate has a bare 

 edge internally, and four teeth externally, and at its outer edge 

 is an accessory process. 



The mandibles are boldly wedge-shaped, the anterior ventral 

 plates being large and with curved lines. Internally, they are 

 symmetrically striated, and are curved externallv in front, a 

 dense black longitudinal plate indicating the curvature. Thev 

 taper posteriorly. 



The apparatus is tinted blackish, and, on the whole, cor- 

 responds to the somewhat crude outline of the parts, in Lvsidicc 

 (ifra, given by Schmarda. The posterior appendages are less 

 elongated, and more definitely bevelled, than in Lvs/'dicc 

 Niiiiita of European waters, but it may yet be a question, how 

 far such variations hold as specific distinctions, especiallv, as 

 the size of the African examples is so much greater. 



The tenth and 20th feet differ from the 30th and those fol- 

 lowing, by the absence of the long black ventral hook, otiier- 

 wise, their structure is similar. 



The 30th foot (Plate III., fig. 13) presents the single powerful 

 black spine, which pierces the surface between the dorsal and 



I 



