FAUNISTIC NOTES AT PLYMOUTH DURING 1893-4. 228 
my notes as they are. They will serve, I hope, as at least an indica- 
tion of the breeding periods of many forms at Plymouth. A more 
extensive list, including the records given in various monographs and 
original memoirs, for the whole of the British Isles, is at present 
under preparation, and will be presented for publication at no distant 
date. 
Prorozoa. 
Noctiluca miliaris.—(Swarm-spores) March (8S, F. Harmer). 
PORIFERA. 
Principally July, August, September. 
Hyprozoa, 
In those Hydroidea which possess sessile gonophores or sporosacs 
the breeding season may be regarded as practically coincident 
with the period of gonophore-formation, although actually a 
little later ; but in the case of those Hydroids which attain 
maturity in the form of free meduse, the time that may elapse 
between the separation of the meduse and the deposition of 
ova is in the majority of cases still unknown, and is certainly 
not a constant quantity. The periods given here will therefore 
be the periods of gonophore- or sporosac-formation. The 
breeding seasons of free medusze may be regarded as the 
periods when they attain their full growth and greatest 
abundance—information upon which points may be gathered 
from the third section, dealing with the floating fauna. 
Tubularia indivisa.—February, March, April. 
Tubularia laryne.—April. 
Tubularia bellis.—April. 
Tubularia humilis.—March. 
Myriothela phrygia.—May to August (Bourne). 
Clava multicornis—March, April. 
Clava leptostyla.—March. 
Clava cornea.—February (Bourne), May. 
Tubiclava cornucopix.—May, June. 
Hydractinia echinata,—August. 
Perigonimus repens.—August. 
Podocoryne carnea,—August (and earlier). 
Coryne pusilla—May ; July (Bourne). 
Coryne vaginata.—May to August (Bourne). 
Syncoryne eximia.—May (Bourne). 
Eudendriwm ramosum.—February, March. 
Eudendrium capillare—May, September. 
Garveia nutans.—April. 
Obelia geniculata.—March, September. 
