or THE 'POECUPINE' EXPEDITIONS. 405 



antenna. The tentacular cirri are larger than the latter, and arise from the ordinary basal 

 process. There is a little brownish pigment on the head. The proboscis is extruded, 

 and has the usual papillae at the tip, besides two superior and two inferior brownish 

 fangs and about four short blunt teeth on each side. The dorsal ciiTus is a short, 

 almost conical, process, with an enlarged base and tapering tip. The ventral is longer 

 and more slender, but does not reach the extremity of the fleshy part of the foot. 

 There is the usual soft process between the dorsal cirrus and the tip of the foot. 



The uniramous foot bears superiorly curved subulate bristles finely serrated from 

 base to apex, and more slender than those represented in PI. LXXII. fig. 14 (from the 

 ventral edge of the foot) ; others are more delicate, the tip beyond the enlarged base 

 having widely distant and opposite setae (PL LXXII. fig. 12, one of the smaller ex- 

 amples). The stout bristles (fig. 13) have a long terminal serrate whip, and the shaft 

 at the base of the latter has a blunt hook and a brush of setae. A tuft of bristles, 

 similar in structure to the superior series, occurs at the ventral edge (fig. 14, and a 

 lateral Adew in fig. 15) ; but there are none with the widely distant setse on the terminal 

 portion. The most remarkable feature is the entire absence of the "brush -like" bristles 

 so characteristic of Pantlialis osrstedi, Kbg. 



Such scales as remained presented a peculiar funnel-shaped aspect, the anterior half 

 being pale, the posterior madder-brown, deepest on the under surface. Microscopically 

 they had a reticulated appearance, from the pentagonal or hexagonal arrangement on 

 the posterior half ; the aspect, indeed, resembled a section of cork. The surface was 

 also studded with minute papillae and brownish granules. 



SIGALIONID^. 



Sthenelais atlantica, n. s. • Dredged in 305 fathoms, at Station 2, 1870. 



A portion of the anterior region of the body only is present. The head is furnished 

 with four distinct eyes, observable from the dorsum and situated at the base of the 

 tentacle, close together on each side. The scales are somewhat rounded or ovoid in 

 front, reniform posteriorly, covered with sparsely distributed but distinct papillae, and 

 having throughout the greater extent of the margin a fringe of short clavate papilla, 

 longest exteriorly. The papillae are decidedly longer and more slender, as well as 

 more numerous, than in S. zetlandica ; and palpocils occur frequently on the summit 

 (PL LXXII. fig. 16). 



The superior division of the foot bears finer bristles, with more delicate serrations, 

 i:hmi.m S. zetlandica; but the papillae have similar dimensions. The inferior branch 

 possesses similar papillae with warts or secondary processes at the tip : the lobes of this 

 division are not boldly marked. The superior ventral bristles (PL LXXII. fig. 17) have 



3 i2 



