44 
THE VOYAGE OF H.M.S. CHALLENGER. 
canal posteriorly, for its conical termination projects freely into the dilated digestive tube, 
which throughout is larger proportionally than in Aphrodita aculeata, and does not 
exhibit the siphonal bend at the termination of the proboscis. The jDapillee of the cuticle 
are less globular than in Aphrodita acideata, having a somewhat ovoid shape. 
This species evidently occurs, as many of its congeners do elsewhere, in great pro- 
fusion at Kerguelen. It is briefly described by Prof. Grube^ from specimens procured by 
the German exj)loring ship “ Gazelle.” It w"as the only species of the genus got in the 
Expedition. Although perhaps not a typical representative of the group, it shows how 
insecure the notion of Kinberg and De Quatrefages was, that Lcetmonice diverges from 
Hermione in having the dorsal covering of felt over the scales.. This has been dwelt on 
by Baird, Grube, and Claparede. 
Lcetmonice produGta, var. ivyvillei (PI. YIL fig. 3 ; Ph IVa. figs. 9-11)., 
Habitat. — Dredged along with many other Annelids on very rich ground at Station 
144a off Marion Island, December 26, 1873 ; lab 46° 48' S., long. 37° 49' AV. ; in 50 to 
70 fathoms; surface temperature, 41°’0; volcanic sand. Another Station is off Prince 
Edward Island, in 150 fathoms ; and a third is Station 157 (about midway between the 
Antarctic regions and Australia), on March 3, 1874; lat. 53° 55' S., long. 108° 35' E ; 
depth, 1950 fathoms ; surface temperature, 37°'2;. Diatom ooze. The latter Station was 
also prolific in novelties.. 
This form on careful examination differs from the foregoing, even in external apjiear- 
ance. Thus the colour of the long dorsal' bristles is much darker and duller than in 
the typical Lcetmonice producta, and they also have less ‘‘sheen.” The ventral surface 
is more villous or papillose, especially over the- oral region. The head has somewhat 
shorter and more globular ocular peduncles, which, however, show no trace of eyes. The 
median tentacle is considerably longer, though it follows the same type. The process 
behind the ocular peduncle on each side is simple and much smaller. The length of the 
largest example is about 68 mm., and its breadth 25 mm., exelusive of the bristles. The 
number of segments is forty-three. 
The great dark brown spines of the dorsum, traces of v/hich occur on the fourth 
foot, quite differ from those of Lcetmonice producta. They are rather stouter, especially 
at the tip (PI. ITa. fig. 9), and as a rule there are only three recurved fangs on each side, 
rarely four. The differences in general structure are shown by contrasting the figure just 
mentioned and fig. 5 of the same plate. The recurved teeth are directed more to one 
face than another, so that both are not well seen at the same time. Another divergence 
is the length of the inner dorsal bristles, which in the previous species form the con- 
spicuous series over the scales. In Lcetmonice producta, var. loyvillei, they are longer, and 
1 Monatsher. d. h. preuss. Akad. d. Wiss. Berlin, August 1877. 
