200 NOTES ON THE LITTORAL POLYCH.ETA OF TORQUAY. 



differs from it, having all the terminal pieces of the compound bristles 

 bidentate in all the regions of the body. 



Giard, on the other hand, as stated on page 202 of Mon. Brit. Ann., 

 vol. ii., considers S. altcrnosetosa as a variety of aS*. cornuta, H. Eathke. 

 The segments in the anterior part of the body are marked with a 

 number of parallel transverse lines, about 20 in number. No buds 

 were seen. Fairly common. 



Syllis krohnii, Ehlers. Mcintosh, Mon. Brit. Annelids, vol. ii., p. 192. 

 Langerhans, Zeits. fur Wiss. ZooL, 1879, p. 529. 



Five examples of this species were found amongst Corallina in a 

 pool in the rocks which jut out from Corbyn's Head. They agreed 

 better with the description and figures given by Langerhans than 

 with those given by Mcintosh. 



The median tentacle is not shorter than the lateral one, but, as is 

 generally the case with the Syllids, longer, The longer cirri, especially 

 in the anterior part of the body, are also much thicker than the short 

 ones, and somewhat club-shaped. The articulations are well marked. 

 The colouring corresponds to that given in Mon. Brit. Anncl. ; the eyes 

 on each side are very close together, almost touching. The bristles are 

 exactly as described by Langerhans, the bulge just under the point of 

 the stalk of the bristles being more pronounced than is shown in his 

 drawing. 



All the appendages are more or less speckled with opaque white 

 spots. 



Trypanosyllis zebra, Grube. Mcintosh, Mon. Brit. Annel, vol. ii., 

 p. 169. 



This beautiful Syllid can be at once distinguished by the great pro- 

 portionate breadth of the body and the markings, from which it derives 

 its specific name. 



It is fairly numerous, most of the specimens being obtained from 

 Laminaria roots from the rocks between Babbicombe and Oddicombe 

 beaches. No simple bristles were detected in the posterior region. It 

 appears probable that these simple bristles in the Syllids generally 

 only appear at certain periods, like the swimming pairs. Only one 

 individual had a bud attached, but one free stolon was found. The 

 number of spines varies from two to four. There are three different 

 kinds of spines : one variety is pointed ; another quite blunt at the 

 point, looking as if it had been cut across at riglit angles to its length ; 

 the third variety is bent at right angles to its length at the point, 

 forming a short hook. The segments are very short in proportion to 

 their breadth, so that the large dorsal cirri almost touch each other. 



