132 LEOCRATES ATLANTICA. 



larger than in examples of L. Olaparedii from Naples, and the tentacular cirri are larger 

 and longer. 



Body about one and a half inches long, massive anteriorly, though in life it probably 

 tapers a little towards the head, as Delle Chiaje and Claparede show in L. Olaparedii, 

 and more distinctly towards the tail. It is rounded or convex dorsally, iridescent and 

 minutely ringed, somewhat flattened ventrally, and with a deep median groove. The tail 

 terminates in a free median vent, with a long cirrus at each side. The tentacular 

 cirri are eight in number on each side, and are long, tapering organs, springing from a 

 massive basal segment (ceratophore), which is furnished internally with spines. The 

 first four segments are fused, but, as Claparede showed in his species, they receive special 

 nerve-twigs, and thus he thinks the view of De Quatrefages, that all the tentacular cirri 

 arise from the buccal segment, untenable. The proboscis in situ presents a somewhat 

 thick, frilled, anterior edge, the median papilla formerly alluded to projecting from the 

 central fold of the dorsal arch. As Claparede pointed out in L. Olaparedii, chitinous 

 jaws are situated in the present species at the anterior end of the organ in situ in the 

 mid-dorsal and mid-ventral lines. The dorsal tooth at the free edge has the shape of a 

 bifid fan, whilst the ventral resembles a conical process. The massive wall of the organ is 

 chitinous and of a brownish hue, and extends backward quite a third the length of 

 the body, terminating at a prominent aperture (the gut) in the centre of its posterior wall. 

 Two flattened lateral cseca, also with dark pigment, occur in this region. The inner surface 

 of the proboscis has two thick pads behind the teeth in front, a transverse bar on each 

 side in the middle, and the posterior half is subdivided by deep grooves. It seems to be 

 an efficient prehensile and suctorial organ, and its great proportional size probably is in 

 relation to its functional importance. 



The bristled feet (Plate LXIX, fig. 17) are sixteen in number, long and prominent, 

 and their resplendent tufts of bristles make them still more conspicuous. The dorsal 

 lobe presents, just behind the ridge of the foot, the basal segment of the dorsal cirrus, 

 while the setigerous region in front is acutely conical, the long black spine passing to the 

 apex. Each bears a tuft of simple and somewhat stiff bristles, which taper gently to a 

 hair-like tip. The whole bristle is marked by transverse strise, as if cameratecl, till 

 within a short distance of the tip. Moreover, the tip is furnished with a regular series of 

 minute spikes. The latter are much more conspicuously developed in L. Olaparedii from 

 Naples, the spikes in some being continued far downward and forming a feature along 

 each side of the bristle. It was the comparison between the dorsal bristles of the two 

 forms that many years ago (long before the expedition of the ' Caudan ' was thought of) 

 led to their separation. Claparede had overlooked the presence of these spikes in his 

 species, as also has Eoule in the present form. The ventral division of the foot is 

 irregularly conical, with a prominent papilla for the powerful black spine or two. The 

 upper slope of the region is downward and outward, the inferior (more abrupt) is 

 downward and inward. In shape the foot thus differs from that of L. Olaparedii, 

 which is longer, and the inferior setigerous region has an abrupt truncated extremity, 

 with, superiorly, a papilla for the spine. The ceratophore of the dorsal cirrus is 

 carried erect in the specimens from the 'Porcupine, 5 whereas it is horizontal in 

 L. Olaparedii, but this is not a point of much moment. The bristles (Plate 



