226 AMBLYOSYLLIS LINEATA. 



small and form two bosses on the ventral aspect of the snout. Eyes four, red, situated 

 obliquely on each side, the anterior pair slightly wider than the posterior, and the pairs 

 on each side connate, or almost so. Some specimens have a black point in the centre of 

 each. Behind the eyes are the cephalic wings, which have a sepia-brown colour with a 

 pale border. Tentacular cirri two pairs (one long and the other short). 



The cirri on the head and first segment are sometimes pinkish from the presence of 

 transverse reddish bars, and De St. Joseph found palpocils on all. 



Body about half an inch or more in length (13 mm., De St. Joseph), segments 

 sixteen to thirty (Marion and Bobretzky), deeply indented at the sutures, but not 

 narrowed in front. It is tapered anteriorly, and again posteriorly, but to a less degree, 

 and ends in a somewhat shield-shaped or bluntly-conical segment bearing two long cirri. 

 The body is slightly rounded dorsally, flattened ventrally, and witli a median ventral 

 groove in the preparations. The general colour is purplish brown, with peculiar and 

 definite yellowish patches. A dark brown bar, with an angle directed backward and 

 thinned off at either end, crosses the segment in a line with the origin of the lateral cirri. 

 Behind is a narrow, pale band with a somewhat cordate mark in the centre, succeeded by 

 a broad brown band which runs into the dark belt first mentioned, and has on each 

 side a pale and somewhat triangular patch which diminishes anteriorly as the brown of 

 the general surface slopes to meet the first dark belt. Considerable variation in the 

 arrangement of the pigment-bands occurs — De St. Joseph, for instance, describing only 

 narrow, straight transverse bars. The last segment is dark brown. The penultimate 

 segment is compressed and has no setigerous process, only two elongated cirri on each 

 side, the longer inferior. 



When the male is fully distended with ripe sperm the body recalls the condition in 

 the Queen termite. 



De St. Joseph states that the proboscis has six large teeth, each subdivided into 

 three divisions (tricuspid). The proventriculus has eighteen rows of points, and instead 

 of the two horny pieces of other Syllids has two horny valves. 



Feet (Plate LXXI, fig. 1) thirteen or more pairs, increasing in size from the front 

 nearly to the posterior end. They vary much in appearance, according to the condition 

 of the reproductive elements, as likewise does the body. Dorsally is the long cirrus 

 which arises from the posterior part of the lobe. It is slightly crenate when living, and 

 has minute grains or specks of white pigment. Near the base of the dorsal cirrus in 

 certain female examples is a small tuft of slender hair-like simple bristles, which readily 

 become curved (from lack of stiffness). These probably represent the pelagic bristles of 

 other forms. They were not present in a male distended with nearly ripe sperms. 



The setigerous lobe is stout, with a bevelled tip, and superiorly is a conical papilla 

 above the exit of the spine, which is supported by four or five others. The bristles 

 (Plate LXXIX, fig. 20) form a dense group, the longer occurring superiorly, the shorter 

 inferiorly, so that the outline of the brush slopes from above downward and inward, as 

 indicated in Plate LXXI, fig. 1, where the foot is observed from above; the translucent 

 and slightly curved shaft of the bristle is dilated at the tip which is bevelled to a point. 

 The terminal blade is longest superiorly, shortest inferiorly, and tapers to a hook at the 

 tip, while on the edge beneath is another process, less distinct, for instance, than in 



