42 Trof. i\I'Intosir.s Notes from th,' 



and translucent posteriorly, Avhilst the muscular lil)res 

 increase in bulk and power. A complex retienlation of 

 blood-vessels covers the wall of the canal anteriorly. 

 Stronjr fibres fiom the body-wall cross the canal, but are 

 not attached to it. The intestine is coated thron^hout with 

 the brownish di<j;estive gland, Mhicb is deeply tinged with 

 yellow pigment. It ceases within a qnaitcr of an inch of 

 the vent. 



Chone duneri, IMalnigrcn, the fifteenth, a widely-distri- 

 Inited species, extends from liiitish waters to Sj)itzbergen 

 and the Gulf of St. Lawrence, Canada. The ee])lialic collar 

 forms a considerable web dorso-laterally, passing backward 

 to the line of the second bristlc-tnft, and doubling forward 

 along the edge of the dorsal fissure on each side so as to 

 make conspicuous parallel edges to the fissnre, as far as the 

 base of the pedicle for the branchiae. The pedicle, after 

 removal of the branchiae;, does not })rojeet beyond the rim 

 of the collar. The bianchise are distingtiished by their 

 comparative length and the long slender terminal processes. 

 The structure of the filaments is typical, and they slightly 

 taper di>tally, ending in a remarkably long winged pr(;cess, 

 which tapers to a delicate tip and has a slender continua- 

 tion of tlie chordoid axi.s in the centre. The number of 

 filaments ranges from six to twenty-two on each side 

 according to si/e, the latter being the nmnber in a fine 

 example from Jan ]Meyen, kindly sent by Prof. Fauvel, and 

 they are united by membrane throughout the greater j)art 

 of their length, the tip being iree. The pinnaR are of con- 

 siderable length, each having the jointed ehoidoid axis. 

 They continue long till near the basal web of the terminal 

 process, when a few shorter oceiir. 



The body in all the examples observed is considerably 

 .smaller than that of C. fuuveli, and is nearly of the same 

 diameter throughout the anterior three-fourths, though a 

 little tapered in front. It then diminislies gently to the 

 tail, wliich is by no means acute. It is somewhat flattened 

 and grooved anteriorly on the doi'sum, and grooved ventrally 

 from the ninth scute backward. A ])apilla 7iuiiks the anus 

 at the tip. I'he nuuiber of segments would appear to be 

 about fifty, and they are distinctly marked, with the excep- 

 tion of the minute caudal rings. The anterior bristles are 

 in two groups — an upper, with longer shafts and tapering 

 winged tips, and a lower, of spatulate form, with a short; 

 tapering process at the tip. The tufts are fewer and smaller 

 than in C. fauveli. Posteriorly in front of the tail the tips 



