194 
Second pair is short and has slightly unequal rami of 6 and 7 segments; the inner 
surfaces of the different segments are rounded; they cannot be said to be protuberant. 
Third pair has the rami unequal by one segment: 7 to 8, or 8 to 9. The inner margins, 
near the upper extremity of the segments, show here and there extremely small teeth in 
some specimens. In other specimens no teeth could be made out. 
Fourth-sixth pairs of nearly the same structure; the greatest number of segments 
counted was 21 to 22. This number slightly increases from the 4'* to the 6, and seems also 
to increase with age. The smallest number seen in the 4* cirrus of one of the specimens 
was 16. The greatest number of pairs of spines on the anterior face of the segments (Pl. XVIII, 
fig. 9) is 4 pairs; the last pair, being that near the inferior extremity of the segments, is always 
extremely small. 
Penis long, growing very narrow towards the extremity; with numerous curled hairs, 
especially on distal part. 
This species was dredged at several stations, and seems to be rather common throughout 
the whole Archipelago. 
Stat. 50. April 16/18, 1899. Bay of Badjo, West coast of Flores. Depth 27—36 m. Bottom: 
mud, sand, and shells, according to locality. Half-a-dozen specimens attached to 
a leaf (most probably of a tree). Surface of shell more or less distinctly striped 
longitudinally. : 
Stat. 51. April 19, 1899. Southern part of Molo-strait, Madura-bay. Depth from 69 to gi m. 
Bottom: fine grey sand, coarse sand with shells and stones. Two specimens 
attached to a calcareous plate, probably a part of a thin valve of a Mollusc. 
Specimens beautifully striped longitudinally. 
Stat. 162. August 18, 1899. Between Loslos and Broken-islands, West coast of Salawatti. Depth 
18 m. Bottom: coarse and fine sand with clay and shells. Several specimens. 
Some of them attached to the surface of the shell of a Pecten. Round about 
a sponge (?) adheres also to that surface, the colony of Balanus extending more 
or less over the surface of the sponge. 
Stat. 164. August 20, 1899. Lat. 1°42’.5S., Long. 130°47’.5 E. Depth 32 m. Bottom: sand, 
small stones and shells. Numerous specimens attached to stones, shells of 
Gastropodous molluscs and other objects, calcareous plates, etc. 
Stat. 213. September 26—October 26, 1899. Saleyer-anchorage and Surroundings. Depth 9 to 
34 m. Bottom: coral-reefs, mud, and mud with sand. A single specimen attached 
to a piece of stone. 
General Remarks. This species occurs at different depths, and is found attached 
to very different objects. It cannot be wondered at that it varies, like other species of the genus 
Lalanus, not inconsiderably in accordance with the different surroundings midst which it lives. 
The figure 10 of Pl. XVIII shows a specimen (from Station 164) with a somewhat elongate 
and narrow carina, and with the other compartments more or less swollen in their basal parts. 
Fig. 2 of Pl. XVII shows two specimens (from Station 51) of a more regular conical shape, 
the compartments of which are beautifully striped longitudinally. Fig. 11 represents a specimen 
which is very characteristic by the breadth and development of the alae. These parts are, 
moreover, conspicuous in this specimen because they give one the impression of lying on another 
plain, the whole surface of the shell being, in consequence, much less flat and regular than is the 
66 
