134 Prof. M‘Intosh’s Notes from the 
the tube of the parent. Moreover, S. dysteri reproduces by 
buds, as in F. implexa, the nurse-stock of seven or eight 
anterior and fifteen to seventeen posterior segments, without 
sexual elements, giving rise to a bud at the eighth or ninth 
posterior segment as in Filograna implewa. He concludes 
by stating that S. dysteri is met with in different con- 
ditions :— 
1. As a hermaphrodite form without buds, measuring 
6 mm., with the anterior segments of the abdomen enclosing 
the male and female sexual elements, the following segments 
constricted, and the terminal enlarged. 
2. As ashort annelid of twenty posterior segments, without 
the filiform portion of the abdomen and which prepares for 
budding, or perhaps has already budded and regenerated, the 
detached segments. 
3. As aform of the same size as the preceding with a bud 
at the eighth or ninth posterior segment. 
4. Asa shorter form from whicha bud has been detached, 
which possesses only nine or ten posterior segments and is 
devoid of eyes. 
In regard to the resemblances between Filograna implexa 
and the present species, they are identical except for the 
absence of the opercula in Salmacina. He mentions the 
ease of the Protula described by Fritz Miller, which acquired 
an operculum on one of its pinnate branchie ; then the 
harbules disappeared, and the lament became the stalk of 
the operculum. In Salmacina dystert at complete maturity 
he found each of its branchie terminated by a mass which 
offered no indication of an operculum ; and, since /ilograna 
implexa at complete maturity retains its two opercula, he is of 
opinion that the two species are stable and distinct. . Yet 
this very statement shows that between S. dysteri and 
S. edificatriz there is a facile step on this head alone. 
In referring to the proposal of Ehlers to suppress the 
genus Salmacina, Claparéde, since its bristles resemble those’ 
of £lograna, De St. Joseph would conserve the genus Fi/o- 
grana as revised by Khlers, but would divide it into two 
subgenera—viz., Filograna with an operculum and Salmacina 
without one. 
De St. Joseph found on the tubes Folliculina ampulla and 
F. atropurpurea, anastomosing amongst them and the minute 
sponges, and Corynids and ova were also present. He 
observes that the dorsal hooks in the posterior region 
resemble the thoracic ventral hooks, but their rows are short 
aud their number few. 
gb amen Soe ar Nae tt 
