100 Prof. M'lntosli's Xutes pom the 



the first two of which are small, hut the rest are conspicuons 

 tufts projecting from setigerous processes, which wlieu 

 viewed from above downward are nearly cylindrical, and 

 when seen antero-posteriorly are slightly tapered distally, and 

 have at the ventral edge of the bristle-tuft a clavate papilla 

 which seems to have escaped Malmgrcn. This clavate 

 papilla is less developed in front than in the posterior seti- 

 gerons processes, where it is much larger distally. Tlie 

 bristles have straight striated shafts which dilate a little 

 from the base upward, continue of nearly equal diameter to 

 the commencement of the wings, and then curve slightly 

 backward and taper to a tine tip. The strife of the shaft 

 become oblique in the cnrvcd terminal region, and the wings 

 themselves are striated for some distance upward. These 

 bristles are evidently much used by the annelid, and the 

 basal striated portion of the wings is often worn. A trans- 

 verse ridge with a small d-jrsal cirrus curved downward 

 represents the dorsal division behind the foregoing and to 

 the tip of the tail. 



The lanielhe for hooks commence on the ventral surface of 

 the seventh segment at some distance from the setigerous 

 process, and at the posterior edge of the segment, wider 

 anteriorly and gradually diminishing. A more or less dis- 

 tinct ridge posteriorly connects them with the setigerous 

 processes. The first are small and little elevated, but they 

 increase in prouiiuence, and gradually approach the seti- 

 gerous process, so that at the twelfth or thirteenth bristle- 

 bundle they are close to it, and the last is nearly as 

 prominent. Thereafter the uncinigerous processes form 

 conspicuous lamellae on each side of the posterior region to 

 the tail. The uncinigerous lamella has in the preparatiojis 

 a slightly irregular or crenu'ated edge, to which the hooks 

 are attached, and a small lanceolate process at the dorsal 

 edge. The hooks have six prominent teeth, the distal region 

 being tapered toward the crown and the dorsal or pos- 

 terior outline has a marked incurvation above the base, 

 whilst a deep bay occurs below the lower tooth, and then a 

 curved prow. In the largest example (over 2 inches) 

 from dee|) water, the hooks remained true to the type, five 

 large u[)per teeth bi-ing fcjllowcd by a smaller process above 

 the prow. De St. .Joseph mentions seven teeth on the 

 anterior iiooks ami six on the posterior ; the anterior rows 

 are convex forwaid, hut the posterior are nearly straight. 



After the bristles ci-asc a snuill ])apilla in:licat(s the site 

 of the s(;tigerous process, and tlu^ papilla by and by projects 

 p(;sterioi"ly iVom a fused lamella which has a dorsal and a 



