168 Prof. M'Intosli's Notes from the 



The bodj^ is filiform and elongated, probably 2-3 inclies 

 in lengtli, apparently tubicolous, and it is impertect pos- 

 teriorly ; but at least two regions are recognizable — namely, 

 the anterior with nine pairs of well-marked pale golden 

 bristles, and the succeeding division. 



The first region agrees with the Chsetopterids in the 

 number of the segments (nine), and each foot has a dorsal 

 and a ventral tuft of moderately long capillary, pale golden 

 bristles (PI. VII. fig. 7 a) which have a slight convergent 

 curve — that is, the dorsal bending downward and the ventral 

 upw^ard. Both arise close together in the tissues, then slant 

 from each other so that a flat cone in the middle of the foot 

 lies between them. The dorsal tuft is considerably longer 

 than the ventral, but the structure of the bristles is the same 

 in both. Each bristle has a long cylindrical shaft not 

 diff'erentiated from the tip, and gradually tapering to a fine 

 point from its middle, though in the shorter ventral forms 

 there are differences in this respect. 



No special differentiation separates the first region of the 

 body from that which follows, and therein it differs from 

 the Chsetopterids ; but the first segment of the succeeding 

 region is three times broader (antero-posteriorly) than those 

 in front, and its bristles are shorter and structurally different, 

 ■whilst each of the two divisions carries a continuous row of 

 stout curved crotchets without the differentiation between 

 shaft and tip as observed in Chatozone (PI. YII. fig. 7 b 

 representing one from the tenth fcot). Dorsally are t\^o 

 smooth capillary bris-tles, followed by five or six crotchets 

 with the tips produced into slender processes, and then a 

 series of the stout curved crotchets with slightly tapered tips 

 ending in a stout though more or less pointed tip. The 

 arrangement of these crotchets recalls the condition in 

 Chcetozone setosa, bristles being also interposed between the 

 crotchets in the rows. 



5. On the Cirratulidae dredged in the Gulf of St. Lawrence, 



Canada, by Dr. VVhiteaves. 

 Chcetozone I. 



A fragment of a Chatozone (?), apparently the posterior end 

 of a large form, was dredged at Station A. 6, 1872, by 

 Dr. Whiteaves. The total length is about an inch and a 

 quarter. The segments are distinct though narrow through- 

 out, and the body is somewhat dilated in front of the tail, 

 and then gently tapers to the terminal anus, below which a 

 process with a median groove projects posteriorly. The 



