Gatty Marine Laboratory, St. Andrews. oa 
tip. At the base of the branchial pinne are rows of granular 
cushions, but all he says about the extremity of the 
filaments is that they are bare, and in his drawing they are 
somewhat delicately tapered. 
Giard* (1875 and 1876) madetwo.notes on the development 
of Salmacina dysteri, Huxley, with figures, from the early 
ovum to the post-larval stage, having three pairs of bristles. 
The description and figures of this able and industrious 
author are excellent. 
Langerhans + (1880) describes Salmacina incrustans from 
Madeira as occurring in tubes on stones between tide-marks 
and on fish-baskets. The terminal process of the branchize 
has a coloured cushion composed of epithelial cells and at 
the tips of the pinne “einige solche Zellen.” In the 
Mediterranean form these cells were absent. A pair of eyes ; 
five to seven setigerous segments anteriorly, the first bearing 
the characteristic bristles, one of which he figures with five 
serrations on the wide basal process below the hiatus (Taf. v. 
fig. 40 6),and the other with a serrated edge devoid of a 
hiatus, but Neapolitan examples of the species show smaller 
and more numerous serrations on the basal web of the tip, 
viz., about double the number indicated by Langerhans, and 
the hiatus is less pronounced. ‘This remark is made on the 
supposition that the form from Madeira is the same as that 
at Naples. The ventral uncini have only five teeth above 
the main fang, whereas in S. edificatriv there are six; yet 
in the figure of the face of the hook in each case there are 
nine transverse rows. The anterior bristle with the curved 
(sickle-like) tip and serrations is also present, though the 
fizure is indifferent. Bristles with smooth wings occur in 
this region, but he does not indicate any differentiation at 
the tip of the tail, though he describes those of S. edificatrix 
as having serrated wings. In the Neapolitan examples the 
serrations of the tip were less prominent. 
Carus (1885) distinguishes Sal/macina thus: Thoracic 
membrane ; branchiz equal, base circular, destitute of an 
operculum. First thoracic segment with a tuft of bristles 
lurger than the succeeding and of a distinct form, semi- 
crenulate. From the third segment, besides winged sete, 
are others semicrenulate. Spatulate and pectinate bristles 
absent from the abdomen—only simple falciform bristles. 
He makes Claparéde’s S. incrustans synonymous with 
? Serpula jfilograna, Sacchi, and so with ? Serpula intricata, 
* Comptes Rend. Acad. Se. 17 January, 1875, and 24 January, 1876 
Also ‘ Giuvres Diverses,’ p. 316. 
+ Zeitsch. f. wiss. Zool. Ud. xxxiv. p. 122. ae 
7] 
