ANNELIDA POLYCHAETA. 163 



chétopodes du Golfe de Naples , Supplément , p. 439 , pi. 

 VII, fig. 1. 



I examined three specimens from Napels and one indivi- 

 dual from the coast of Portugal (Villa Nova de Milfontes), 

 collected by Prof. M. P. d'Oliveira. 



The last worm measures 10 cm. in length, while the 

 number of its segments amounts to 102. In group I. its 

 proboscis has two paragnathi, a large tooth preceded by a 

 smaller one, whereas in the Napels specimens there occurs 

 only a single tooth. Our individuals do not agree in all 

 regards with Ehlers' description ; f. i. the anal cirri are 

 much longer than indicated by Ehlers, reaching as far as 

 the posterior 11 segments; the tentacular cirri are also 

 longer. According to Ehlers' description they should reach 

 the 5th ring , whereas in our specimens they reach the 7th 

 and 9th segment. In the structure of its feet the Portu- 

 guese worm differs somewhat from the Napels specimens, 

 and agrees better with the figures of Audouin and M. Ed- 

 wards J ) , than with those of Ehlers ; the inferior ligule is 

 longer, and extends somewhat beyond the tip of the ven- 

 tral setigerous lobe. As first was demonstrated by Clapa- 

 rède , and afterwards confirmed by Langerhans 2 ), there oc- 

 cur in the inferior fascicle of the ventral lobe some hete- 

 rogomph setose bristles. 



Nereis mavropus Clap. (PI. 7, fig. 12). — Claparède , 

 loc. cit. Supplément, p. 444, pi. VIII, fig. 1. 



As far as I know , only the atocous form of this spe- 

 cies was observed by Claparède. In our collection I met 

 with two female specimens in epitocous condition , labelled 

 »Méditerranée, Cuvier". Only one specimen is complete; 

 it measures 62 mm. in length and has 104 segments. The 



1) Ann. Sc. nat. Ie Séï. T. 27, pi. XI11, figs. 4—6; Règne animal, pi. 

 XII, figs. Id and l e . 



2) Die Wurmfauna Madera's: Zeitschr. f. Wissensch. Zoölogie. Bd. XXXIIT, 

 p. 289. 



Notes from the Leyden Museum, Vol. XI. 



