Prof. E, Claparéde on the Structure of the Annelida, | 337 
metrical sexual orifices. The orange-coloured matter surround- 
ing these orifices in Patella, and their position close to the mass 
of the salivary gland, is somewhat inexplicable, unless it should 
appear that part of the salivary gland is an accessory generative 
gland. 
I have been induced to offer this abstract before proceeding 
to publish a fuller account, with drawings, as there may be a 
delay of some time in this ; at the same time an opportunity 
may be obtained of correcting or adding to some of these notes. 
XLIV.—On the Structure of the Annelida, including a critical 
Examination of the most recent Works on this class of Worms. 
By E. Craparepe*. 
A sosourn of five or six months at Naples, during the winter of 
1866-67, enabled me to devote myself persistently to the study 
of the Annelida of its bay. The extraordinary richness of this 
sea surrounded me with an abundance of materials so great that 
I could not make use of the whole; and from the very first day 
I was convinced how erroneous is the opinion of M. Quatrefages + 
that volcanic shores are poor in Annelida. The poverty which 
has been detected here and there by that naturalist was certainly 
due to other causes than vulcanicity. 
The Annelida of Naples have been on the whole but little 
investigated. They have, however,-been more studied than is 
generally supposed. Delle Chiaje, with his indefatigable spirit 
of investigation, devoted to them many hours of observation. 
He has accumulated drawings upon drawings, often without 
taking the trouble to append to them any corresponding text. 
His publications were made with but little method or continuity. 
Moreover Delle Chiaje has been but little understood, and often 
misunderstood{. His works are inexhaustible quarries, from 
which the roughly squared blocks will only be slowly extracted. 
How many times have I thought myself in a position to publish 
entirely new facts, only to convince myself, by the careful exa- 
* From the ‘ Bibliothéque Universelle, Archives des Sciences,’ Septem- 
ber 1867, pp. 1-44. Communicated by the author. Translated by W. S. 
Dallas, F.L.S. 
This memoir forms part of the introduction to a work on the Annelida 
of the Bay of Naples, to be published under the auspices of the Société 
de Physique et d’Histoire Naturelle de Genéve. This work, which is 
now in the press, will be accompanied by thirty-one plates in 4to. 
+ Histoire Naturelle des Annelés, tome i. p. 153. 
{ Delle Chiaje himself complains of having been misunderstood by 
Carus, Meckel, Wagner, Milne-Edwards, and Grube (Descrizione e Noto-, 
~~ og 1841, tome iii. p. 69). Now-a-days he might still further enlarge 
this list 
Ann. & Mag. N. Hist. Ser. 3. Vol. xx. 23 
