NOTOPYGOS CRINITA. 169 



is very small and was probably overlooked by Grube; it 

 bears the two short, stalk-shaped cirri, which terminate 

 in a globular bud. The body is elongate , with its dorsal side 

 plane; the ventral side is very convex, and marked with 

 a shallow longitudinal groove. On the dorsum of each seg- 

 ment there is an area , having the shape of a triangle , the 

 base of which is formed by the frontal margin of the segment 

 whereas the tip lies on its middle; from the middle of the 

 base of the triangle rises a short line, soon bifurcating in 

 two other lines running to the middle of the lateral sides 

 of the triangle ; in this way the triangular area is divided 

 in three smaller ones, an apical and two basal areas. A 

 dorsal median groove, mentioned by Grube, I could not 

 find out. The anal opening is situated on the tip of a 

 papilla, on the posterior half of the 22nd segment; however 

 in the smallest specimen it lies on the 23rd ring , where- 

 as according to Grube it should be placed between the 2 1 st 

 and 22nd ring. It is strange that neither M'Intosh ^) nor 

 Haswell -) mentions anything about its situation. 



The bristle-fascicles are increasing in length towards the 

 end of the body, except in the largest specimen. Each 

 dorsal fascicle is surrounded at its base by a semilunar 

 violet band; a violet stripe also occurs along the anterior 

 dorsal cirrus of the 2nd , 3rd and 4th ring. The un- 

 paired tentacle is somewhat shorter than half the length 

 of the caruncle. The caruncle is connected with the 

 4 anterior segments and impinges with its posterior tip 

 on the 6th ring. The branchiae commence on the 5th 

 segment. Each tuft consists of three main stems , an 

 anterior , a posterior and a lateral one , divided in its turn 

 in several short , thick threads , the number of which increases 

 towards the body-end. In regard to the bristles I can add , 

 that in three specimens they are quite smooth , without 



1) Loc. cit. p. 17. 



2) On six new species of Amphinomidae , Proc. Linn. Soc. of N. S. Wales. 

 Vol. Ill, 1879, p. 343. 



Notes from the Leycleii Museum , Vol. "VIII. 



