Gatty Marine Laboratory, St. Andrews. 133 
with a reaping-hook curve is present in the succeeding 
segments, only those with a “ knee” and an ordinary winged 
tip. The hook agrees with that found in the common 
Filograna, though the artist has not represented the streaks 
at right angles to the serrations. The earliest bud has 
only segments similar to the abdominal of the parent. 
He considers his species near Huxley’s Protula dysteri, 
though it has no eyes; both have the terminal organ of the 
branchial filaments. So far as can be seen, there is nothing 
in Ehlers’s description to distinguish his species from 
Filograna implexa, 
Lo Bianco* (1893) mentions the following hermaphrodite 
forms: Amphiglena, Salmacina, Spirorbis, Pileolaria, &c., 
the ova being deposited in the interior of the tube or placed 
in the operculum ; the young by-and-by forming colonies by 
fission. Fissiparous reproduction occurs in Salmacina and 
Telepsarus. 
In 1894 De St. Joseph ft made a contribution to the 
history of this species (Salmacina dysteri variety), which he 
dredged frequently on shells, on Ryliphlea pinastroides, and 
collected on rocks and stones at Rochardieu. He gives the 
size as 6 mm., and shows how in many features it resembles 
Filograna implexa, only it has no operculum. He further 
states that each branchial filament is terminated by a 
peculiar enlargement formed by a double row of cells with 
palpocils, the latter also occurring on the pinne. ‘The 
segments of the anterior region (thorax) range from seven to 
nine, and have bristlesand hooks resembling those of Filograna 
impleza. 'The naked region behind the anterior has ten or 
twelve segments, whilst the posterior region (abdomen) has 
from 40-50 segments, the middle being narrowed, and the 
anterior and posterior parts dilated, the tip again narrowing 
to the two terminal papille. The bristles agree with those 
of F. implexa. The alimentary canal, the blood-sinuses 
around the gut, and the excretory organs anteriorly de- 
bouching by a common aperture are all in accordance with 
the parts in F. impleca. Ue found ripe eggs and ciliated 
embryos in the cclomic cavity, proving that impregnation 
is internal, the earlier atrochous forms of similar size to the 
eggs, and with two minute eyes in front; besides others 
more advanced, with a ciliated collar behind the eyes, three 
setigerous segments, and an anal. No hooks are present. 
This stage he thought anterior to that described by Giard in 
* “Gli annellidi tubicoli trovati nel Golfo di Napoli,” op. cit. 
+ Ann. Sc. Nat, 8° sér. t. xvii. p. 340, pl. xiii. figs, 375-380, 
