356 
NOTES AND MEMORANDA. 
Hougue ; I have recently at Wimereux met with the same species of 
Annelid, which lives in the adult state under very peculiar conditions : 
it is in reality one of the most interesting forms for the genealogical 
classification of the Cheetopoda. If we examine attentively a corm of 
Laomedea gelatinosa, we frequently find on the branches of this 
Hydrozoon, small transparent upright tubes, which may easily escape 
notice, so exactly do they imitate the gonothecac of the Campanularia. 
Each of these tubes is inhabited by a pretty transparent Annelid, 
which only differs from the assumed embryo of Terebella concMlega * 
in having the seven tentacles practically equal to each other ; at least 
the median one exceeds the six lateral ones but very little in length. 
The presence of generative products in a good many individuals 
assures us that these Annelids are adult. The existence of voluminous 
otocysts, exactly similar to those of the Molluscs, the peculiar form 
and disposition of the tori uncinigeri at the extremity of the ventral 
cirrhi of the posterior part of the body, enable us to class this Annelid 
in a new genus, much farther removed from Terebella than has been 
hitherto supposed, and presenting affinities with several families of 
Polychetes. I dedicate this genus to my pupil Adolphus Wartel, who 
was the first to find the Annelid. I call the species Wartelia gonotheca 
to recall the curious mimetic character which I have noticed above. 
The disposition of the tube of Wartelia gives it also a certain re- 
semblance to the tubicolous Eotifers. 
After the preceding facts, a retrogressive metamorphosis and a 
transformation so complete as Claparede had thought it, is out of 
the question for Terebella The embryogeny of Terebella concliilega 
ought to be entirely re-examined; the most complete observations 
which we possess at the present day on the development of Annelida 
of the genus Terebella are those of Milne-Ed wards relating to Terebella 
nebulosa, Montagu. 
Near to the Wartelia should probably be classed a tubicolous 
Annelid from the Mediterranean, described by Wilhelm Busch, | as 
well as the genus Lumara of Stimpson.J Perhaps even the larva 
figured by A. Agassiz § as the embryo of Terebella fulgida, Agassiz, 
may also be only an embryo of a form nearly approaching Wartelia ; 
this is what may be supposed from the general aspect of the animal 
and the presence of highly developed auditory capsules. It is known, 
indeed, that this auditory apparatus only exists in a very small 
number of Annelids, in other respects far removed from those which 
form the subject of this note.|| 
Hyalodiscus subtilis (Bailey). — Mr. F. Kitten, Hon. F.R.M.S., sends 
* PI. ix. fig. G, of Claparede. 
t ‘ Beobachtungen fiber Anatoniie imd Entwickeluiig einiger wirbelloscn 
Seethiere.’ Von Dr. W. Busch. Berlin, 1851.^ 
X Stimpson (W.), ‘Marine Invertebrates of Grand Manan,’ 1853, p. 30. I 
have not been able to procure this work, which I quote from an extract of A. 
Agassiz. 
§ “ On the Young Stages of a few Annelids” (‘Annals Lyceum Nat. Hist, of 
New York,’ vol. viii., June, 1866), pp. 320, 321, pi. vii., figs. 19 and 19a. 
jl M. Alf. Giard, in ‘ Comptes Rendus,’ vol. Ixxxvi. p. 114. 
