FAUNISTIC NOTES AT PLYMOUTH DURING 1893-4. 235 
ance for the greater part of September, the possible exceptions being 
Radiolaria, Bipinnaria, and Tornaria. 
On the other hand Terebellid larve are increasingly numerous ; 
the larvae of Muggiza, of the Nemertine Cephalothrix, and of the 
Gephyrean Thalassema may be found; and Miiller’s larve, Puli- 
dium, the larve of Magelona, Chetopterus, Rissoa, and Atgvrus 
are generally in the earlier part of the month especially plenti- 
ful. 
Apparently characteristic of this period are the clouds of pelagic 
Rotifers which may occasionally be taken. 
The diatom Chetoceros is especially abundant. 
October.— With the end of September an impoverishment of the 
fauna sets in, owing chiefly to the disappearance of the more 
oceanic element. 
Chetoceros is the most plentiful diatom. The alga Halosphxra 
reappears. Dinoflagellates are abundant, and a few Radiolaria may 
still occur. The following meduse may be present :—Cytxandra 
areolata, Hutima imsignis, and large Irene pellucida. 
Nemertine larve, including those of Cephalothrix, are numerous. 
Polycheete larvee of the genera Polynoé, Chextopterus, Polydora, and 
Terebella are still present. 
Larval Lamellibranchs and Oyphonautes are numerous, as indeed 
they seem to be during the greater part of the year. 
Decapod larve are scarce, especially those of the Brachyura. 
Sagitta is generally present, and a few Plutei may be taken. 
November.—The impoverishment continues. There is a great 
scarcity of meduse, veligers, and Zozwze. The larve least rare are 
those of Polychetes, Cirrhipedes, Macrura, and Cyphonautes. 
Cephalothria larvee and Ophiurid Plutei may occur, 
The diatom Coscinodiscus is present in profusion. 
December.—Medusz are still rare or even entirely absent. Annelid 
trochospheres and Opisthobranch veligers show signs of increasing 
numbers. Cyphonautes is present. 
