SYLLIS KEOHNIL 193 



Adriatic (Ehlers) ; Mediterranean ; Canaries (Langerhans) ; shores of France (De St. 

 Joseph). 



Head somewhat narrowed behind, notched in front and with two prominent 

 tapering palpi, which are ciliated. Eyes four, reddish, placed obliquely in pairs, the anterior 

 pair being the wider apart. The moniliform median tentacle is less elongated than the 

 lateral cirri, and projects upward from its attachment between the eyes. It is speckled 

 with opaque white dots. The lateral tentacles are shorter, but of similar shape to the 

 median. The buccal segment has two cirri, the dorsal being longer than the lateral 

 tentacles. All these organs are slightly annulated, and have white specks and whitish tips. 



Body about an inch and a half long when extended, linear, very little tapered in front, 

 but diminishing posteriorly to a slender tail which has a median papilla and two cirri. 

 Dorsum pale anteriorly, marked transversely by more than a dozen madder-brown bands, 

 the anterior being double. The rest of the dorsum is opaque yellowish white (from the 

 viscera), paler at the sides and posteriorly. The under surface is pale anteriorly, pale 

 orange throughout the greater part of its length, and translucent towards the tail. 



The proboscis has its anterior edge denticulated, and stretches from the second to 

 the sixth segment. Opposite the fourth segment of the body the organ has a prominent 

 tooth. The proventriculus extends from the sixth to the tenth segment. The region of 

 the canal behind shows the lateral cseca, which, springing about the twelfth, pass 

 forward to the ninth, and backward to the thirteenth. The gut is ciliated internally and 

 of a brownish colour. 



The segments throughout are distinctly marked, each furnished with a large dorsal 

 cirrus alternately with a smaller one. The former are a third larger, more opaque, 

 speckled with distinct white dots, and instead of passing transversely outward as the 

 others do, they are borne upward in a graceful manner, the tips usually curved inward or 

 coiled in various ways. The other cirri are smaller, paler, also speckled with white dots, 

 and longer than the diameter of the body. Both are somewhat tapered towards the tips, 

 and at the base of the anterior cirri is a brown speck. The tail terminates in two long 

 cirri. 



The setigerous region of the foot bears a series of translucent bristles (Plate LXXIX, 

 fig. 12), the shaft of which is slightly curved distally and the tip dilated and bevelled, a 

 trace of serrations occurring on the convex edge. The terminal piece is of moderate 

 length with' a simple hook at the tip, and the edge of the process is finely spinous, the 

 first spine being so prominent as to give a pseudo-bifid aspect to the tip. 



The specimens were unfortunately so softened by decay after death that the outlines 

 of the foot could not be safely drawn. The ventral cirrus forms an elongated cone. 



In Ehlers' figure the alternate cirri are club-shaped, a feature not observed in the 

 healthy specimen from North Uist; whilst, again, the cirri of the third and fourth 

 segments were nearly equal, whereas Ehlers shows a clavate pair. All the cirri are much 

 more distinctly articulated than in the British example. 



Reproduction. — A large example, procured in August under a stone between tide- 

 marks at Herm, had a bud at its posterior end. It agreed with the coloured figure for 

 the most part, every alternate dorsal cirrus being long and generally carried with a 

 coiled tip. Behind the madder-brown bars in front is a pale yellowish part and then a 



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