602 
ZOOLOGICAL LITEHATURB. 
papillae^ closely approximated so as to give it a shagreened 
aspect. The egg also presents an equatorial band or ring of 
bright circular spots^ enclosing an equally transparent nucleus. 
On more careful inspection, each spot is seen as a flask-shaped 
ampulla, placed immediatel}'^ beneath the chorion, its neck tra- 
versing that membrane. The ampullae seem filled with a 
colourless or pale roseate liquid. One of these bodies when 
its neck is turned towards the observer, appears as a circular spot 
enclosing a second smaller one formed by the projection of the 
neck. The spermatozoa also are flask-shaped, with a very long 
tail. Their tissue is not homogeneous, but exhibits minute 
differences, like those which Valentin has found in bears and 
other mammals. The clear-coloured flask-shaped body shows 
in front a darker semilunar spot, besides a smaller posterior 
one. The neck is surmounted by a papilla, like the stopper of 
a bottle. 
Fam. CAPITELLIDiE. 
Capitella Jiliformis (the first discovered Mediterranean species of the genus). 
‘ Notomastus sarsii ; N. henedeni. A third, more obscure, species has also 
been met with. Notomastus has no branchiae, and appears quite distinct 
from Dasyhranchus (Gr.). 
Fam. PlIYLLODOCElDiE. 
Oxydromus pallidus, 
Fam. Syllid^. 
Syllis armandi j S. hexagonifera j S. simillima ; S. aurita j Sphcerosyllis 
tenuicirrata j Sylline hrevipes ; Odontosyllis dugesiana } Pterosyllis dorsigera ; 
Autolytus nibrovittatus } A. roseus \ A. scapidaris. 
Spermosyllis, n. g. Frontal lobes very prominent, blended together, but 
separated by a median groove ; pharynx quadrangular, crowned with a 
single shaft ; antennae unpaired, reduced to the condition of a mere granular 
protuberance ; one pair of tentacular cirri ; one pair of rudimentary dorsal 
cirri for each segment ; no ventral cirri. Probably no alternate generation. 
Sp. S. torulosa. 
Trypanosyllis, n. g. Frontal lobes very prominent, distinct throughout ; 
pharynx quadrangular, armed, trepan-like, with a circlet of denticles along 
its anterior border j antennae (three), tentacular and dorsal cirri, moniliform ; 
ventral cirri pinnate. Alternate generation. Sexual individuals like those 
of Syllis. Sp. T. krohnii. 
PolymastuSf n. g. Frontal lobes distinct, but not projecting in advance of 
the frontal margin j pharynx quadrangular, without armature j antennae 
three, shaped like trapezoidal lobes j parapodia pyriform ; tentacular and 
dorsal cirri transformed into tubercles crowned with a sphere. On the back 
four longitudinal rows of spheres, similar to the dorsal cirri j no ventral 
cirri. Reproduction unknown. Sp. P. paradoxus (resembles Eurysyllis of 
Ehlers). 
. Fam. EuNiciDAii. 
• Lysidice mahagoni ; Pumce tc&nia. (This Eunice is remarkable for its size 
