44 ANNELIDA POLYCHAETA. 



sist only of a small number of bristles ; those are rather 

 smooth, a narrow membrane along their distal portion is 

 scarcely visible and the tip is covered with some scaly 

 hairs. The ventral bristles resemble somewhat those of A. 

 marina, but they are furnished at the convex side of the 

 hook-shaped tip with a secundary tooth , behind which some 

 faint serrations are visible (fig. 13); Claparède has recogni- 

 zed this character, but his figure is not very correct. In 

 this species the ventral bristle-fascicles of the anterior body- 

 region are not much smaller as those of the posterior 

 brauchiferous region , like in the foregoing species , but they 

 have about the same dimension , and reach nearly to the 

 median ventral line; whereas f. i. in A. marina the 5th 

 ventral fascicle contains about 20 bristles , in this species 

 the number of them will amount to about 100. 



The proboscis is covered with acute conical papillae; 

 only at its base there are about 5 series of large and more 

 obtuse ones. 



From Prof. Oliveira of Coimbra I received for identifi- 

 cation an ^fmnVo^a-specinien from la Granja (Coast of 

 Portugal); this specimen agrees in many regards with A. 

 Grubii, therefore I am not inclined to base a new species 

 upon it. The worm has a length of 105 m.m. , but it 

 wants a portion of the posterior region. There are 34 se- 

 tigerous segments. The branchiae agree in their feature 

 with those of A. Grubii ; the first pair of them is also 

 situated on the 12th setigerous segment, but is not so 

 developed as in the last species. The bristles show some 

 small differences; the dorsal bristles have an obvious mem- 

 brane along their distal portion (fig. 15) and the ventral 

 ones have only a single tooth without serrations behind 

 (fig. 14). Perhaps it may be considered as a local variety 

 of A. Grubii. 



Notes from the Leyden Museum, Vol. XI. 



