ous. * Miscellaneous. 
genus established by Malmgren for some Syllidians from Spitzber- 
gen. I have since been able to examine several individuals of the 
species, and I have constantly recognized the existence of a lamel- 
lar first ventral cirrus, which acquires a great development and 
contrasts with the homologous organs of the following segments. 
The hooks of the composite sete are all very long and of a peculiar 
form. Iam now able to appreciate better these differential charac- 
ters, as I have before me other specimens of Husyllis very distinct 
from the former, and which cannot be separated from Eusyllis moni- 
heornis, Malmg.; these come from the deep coralligenous regions. 
These Annelides attain a length of 10 millims., and possess 50 seti- 
gerous segments. The cephalic lobe is deeply set in the buccal ring, 
which adyances above it, forming a small dorsal gibbosity. We observe 
two pairs of principal eye-spots, anda supplementary pair of small eyes 
placed at the base of the outer antenne. All the appendages are 
irregularly articulated; the first dorsal cirrus attains a consider- 
able length, and is often rolled up in the manner of the organs of 
Autolytus. The two palpi are greatly developed, and soldered to- 
gether at their base. The pedal mamille are all very prominent, 
and bear pinniform ventral cirri. The ventral cirrus of the first 
segment, however, is always smaller than those of the following 
segments, whilst we find a contrary arrangement in Husyllis lamel- 
ligera. ‘The trunk occupies the first five zoonites; the denticles with 
which its aperture is armed seem to be much larger than those of 
Eusyllis lamelligera. The proventriculus is succeeded by a colour- 
less region furnished with T-shaped glands; and the intestine pre- 
sents no very deep constrictions. 
All these characters agree with Malmegren’s figures and descrip- 
tion. Each foot is supported by a strong hooked acicula. The 
composite sete bear rather short bidentate hooks, identical with 
those of Husyllis monilicornis from Spitzbergen ; but in the midst of 
them I find a slender recurved stem, terminated by two little points. 
This organ exists in all the feet; it is quite independent of the 
dorsal filiform sete which appear at the time of sexual maturity. 
From these observations it appears that the genus Husyllis is re- 
presented on the shores of the Mediterranean by two very distinct 
forms. One is perhaps peculiar to the Mediterranean; it has not 
yet been indicated in any other sea. The other, on the contrary, 
belongs to a type which is diffused even into the Arctic regions. 
It is evident that it only requires careful investigation to increase 
the number of species common to the Mediterranean and the ocean. 
I have ascertained that the Hermelle of the shores of Provence do 
not differ from those of the English Channel and of the Scandina- 
vian coasts; and the Psamathe cirrata of Saint-Vaast exists in the 
coralligenous gravels of Montredon, We cannot, therefore, over- 
leok the bonds which unite the Mediterranean and oceanic faunas, 
although the autonomy of these faunas is nevertheless indisputable. 
—Comptes Rendus, February 22, 1875, p. 498. 
