150 
THE VOYAGE OF H.M.S. CHALLENGER. 
Leanira, Kinberg. 
Leanira magellanica, n. sp. (PL XXL fig. 7 ; PI. XXIII. fig. 13 ; PI. XX V, 
figs. 6, 7 ; PI. XIIIa. figs. 19, 20). 
Habitat.— Two fragmentary specimens were trawled at Station 306a (in the Strait of 
Magellan), January 2, 1876; lat. 48° 27' S., long. 74° 30' W.; depth, 345 fathoms; 
bottom temperature 46°'0, surface temperature 57°’5 ; sea-bottom, blue mud. 
A species of considerable size, the larger fragment measuring 77 mm. in length and 
about 7 mm. in breadth. 
The head has a peculiar mottled iridescent appearance, is rounded and devoid of 
eyes. The tentacle, arising anteriorly from an enlarged base, is a filiform and elongated 
organ. It is, however, only about a fifth the length of the palpus. Close by the base 
on each side is a short and somewhat spathulate organ, which may be the homologue of 
the antenna. There are two tentacular cirri superiorly on each side and two inferiorly, 
the outer in each case being the longer. The palpus is smooth and extremely long, 
reaching beyond the tip of the extruded proboscis. The latter presents eleven papillae 
dorsally, and the same number inferiorly, and its upper surface is marked by three 
longitudinal muscular bands pertaining to the first region of the alimentary canal. The 
maxillae do not appear to present features of diagnostic importance. 
The scales (PI. XXV. fig. 6) are soft, semitranslucent, and of considerable size. Then* 
general form is somewhat ovoid, and their outline perfectly smooth. Behind and below 
the scar of attachment is a granular mass from which nerve-branches radiate to all parts 
of the scale. The surface of the scale is studded with rather large isolated papillse as 
well as groups of papillse which give a peculiar character to the organ. The large free 
papillse occur on the space below and behind the umbilicus, while the conglomerate 
affect the marginal region, from the upper border posteriorly to the anterior border 
inferiorly. They are most abundant in the latter region. When fully formed the scales 
would appear to cover the back entirely. 
Each foot has superiorly a well-marked branchial process, and three ciliated pads, a 
small one beneath the former organ, followed by an elongated closely attached one, while 
a more prominent pad occurs at the base of the dorsal division of the foot. The prepara- 
tions, unfortunately, have been too much injured to give a perfect view. Several 
elongated and tapering papillse are attached to the tip of the dorsal division of the foot, 
and the free margin of the lower division has numerous processes of the same kind, a 
clear space, however, intervening between the last and the ventral cirrus. The latter is pro- 
portionally larger than in Psammolyce and Sigalion, and its tip extends as far outward 
as the setigerous lobe, and therefore considerably beyond the base of the bristles. 
The dorsal bristles of this form are less slender and elongated than in Leanira 
