48 NOTOPHYLLUM FOLIOSUM. 



the median region having darker pigment. The absence of these amongst other points 

 in Malmgren's description and figure had probably misled Levinsen. The oral tentacles 

 (two on each side) are finely pointed, somewhat flattened, and shorter than the median. 

 The buccal segment has two longer and two shorter tentacular cirri on each side, the 

 former being frequently carried along the dorsum under the two anterior ]amella3 (cirri), 

 and over those behind. All these processes, like the head, are of a pale greenish yellow 

 with darker grains. The mouth opens on the under surface, the prostomium in front 

 having a ridge on each side with a hollow between, thus forming a channel leading to the 

 mouth. The under lip resembles a somewhat broad cushion. 



Body linear, from If in. to 2 -J in., and from 80 — 110 segments, gently tapered at head 

 and tail, and for the most part overlapped dorsally by the large imbricate cirri. The dorsal 

 surface is convex, and each segment is crossed by several impressed lines, arranged 

 symmetrically. The ventral surface is flattened, and frequently grooved in the centre. 

 The rather small anterior region of the proboscis in protrusion forms an ovoid or 

 somewhat elliptical mass, which, under a lens, is apparently smooth, though its surface is 

 covered with minute granules under a higher power. It is thus practically smooth. The 

 tail is terminated by a blunt papilla indicating the vent. 



The dorsal cirri are bordered with brown which increases in depth in those kept in 

 confinement, and are speckled with white grains. The body is pale, iridescent dorsally, 

 darker on the ventral surface, which is marked by minute dark grains on each segment. 

 The lobes of the feet have blackish tips, the inferior papillae forming a row of rounded 

 granular spots on each side. During the various motions of the animal the dorsal cirri 

 present very fine iridescence of a fiery hue, as if from the reflection of red-hot coal. 

 The softness and beauty of the species is accurately indicated in the coloured figure. 



The dorsal lobe of the foot (Plate LXVII, fig. 5) is directed upward, with a pointed 

 prolongation inward, to which the great lamella is attached. The spinigerous papilla is 

 at its outer border, but its translucent, tapering bristles are few (about two) and smooth. 

 This lobe bears the large, more or less horizontal, dorsal cirrus which is described by 

 Malmgren as elliptico-subrectangular or unequally reniform. The new or regenerated 

 lamellae are more or less reniform, especially posteriorly, whilst the older cirri incline to 

 an elliptico-subrectangular shape. The new lamella are pale, smooth at the edges, and 

 minutely speckled with white grains. When fully developed the edge presents slight 

 frills, and the coloured border is rich blackish-brown, which glistens now and then with 

 the purplish-red iridescence of the surface of the lamella, enlivened here and there by 

 groups of white grains. The first lamellae are smaller, and more elongated than those 

 behind. 



The inferior division has a trunk not much less than the dorsal, and it carries a small 

 obovate or irregularly reniform, more or less vertical, cirrus, the free border of which is 

 marked by blackish brown pigment. Internal to the lamella, and connected with it, is a 

 large lobe, or papilla, which is also marked by black grains, and thus a conspicuous 

 moniliform row occurs along each side of the ventral surface. The first pair of ventral 

 lamellae are nearly lanceolate, and are borne at a different angle from their successors, 

 forming a pair of ventral processes, which stretch behind the labial cushion. This 

 modification of the ventral division is common in the Annelids. 



