174 
Prof. McIntosh’s Notes from the 
system it is allied to Ilircinia and Euspongia. It occupies 
an intermediate position between the known types. 
I bestow the name Sarcomus * on this new genus, which 
appears to me to deserve a new family. The species from 
the environs of Nice I designate Sarcomus Georgia . 
XXII. — Notes from the St. Andrews Marine Laboratory 
( under the Fishery Board for Scotland). — No. XII. By 
Prof. McIntosh, M.D., LL.D., F.R.S., &c. 
1. Preliminary Note on the Occurrence of the Pelagic Annelids and 
Chaetognaths in St. Andrews Bay throughout the Year. 
2. On the British Species of Spinther. 
3. On the Young Stages of the Gunnel ( Centronotus gunnellus ). 
1. Preliminary Note on the Occurrence of the Pelagic Annelids 
and Chcetognaths in St. Andrews Bay throughout the 
Year . 
The following remarks on the pelagic Annelids of the Bay of 
St. Andrews are preliminary, and formed indeed part of 
a survey of the whole pelagic forms from fishes downwards 
during the year 1888 — especially in their relation to the 
fisheries J. 
So far as regards the marine Polychceta the contrast with 
southern waters is marked, since hitherto there has been an 
absence of such typical pelagic Annelids as the Alciopidse, so 
well described by Greet' §, or the Syllidians, which have lately 
received the careful attention of Viguier ||. The only adult 
pelagic forms, indeed, are Autolytus and the sexual forms of 
the Nereides. All the others are larval, postlarval, and 
young stages of Annelids, and thus fall under the temporarily 
pelagic group. They often occur in large numbers and pro- 
bably exercise an important function in connexion with the 
food of post-larval and young fishes, for it is well known that 
* Prom (TcipKco/xa, a fleshy excrescence. 
t Named after Georges Guessler, a very skilful diver employed by me, 
and who obtained for me the first specimen of this sponge. Since then 
1 have often collected it myself. 
X I have the same acknowledgment to make as in the previous note 
(XI.) in regard to the assistance given me in the examination of the various 
nets by Mr. J. Pentland Smith, M.A., B.Sc. 
§ “ Untersuchungen fiber Alciopiden,’ * 1 2 3 Nova Acta L. C. 39. 
|| u Sur les Animaux inferieurs, II. Annelides Pelagiques,” Archiv. 
Zool. Exper. 2 e s6i\ iv. p. 347. 
