14 Journal of Entomology and Zoology 
CAMPANULARIAE 
PLUMULARIIDAE: Hydranths sessile, borne in a row on small 
lateral branches, with nematophores. Gonangia large. 
Plumularia setacea (Ellis) Lamark. Anim. sans Vert., 1st 
ed. 1815. p. 129. Large. Nematophores, 2 above and one below 
hydranth. Alternate hydrocladia. Not branched. 
On piles under the Pleasure Pier, Long Beach, Calif. Low tide, 
December 1920. Gonangia ripe, in pairs. 
Plumularia lagenifera Allman. Jour. Linn. Soc. Lond., 1885, 
XXIX, p. 157, pl. XXVI. Very large and stiff. Unbranched. Cor- 
bula not numerous. Station unknown, probably from dredgings at 
Laguna Beach by Bean. 
Aglaophenia struthionides (Murry) Clark. Trans. Conn. Acad., 
III, 1876, p. 272. Small, abundant on Fucus inshore, at Laguna 
Beach. With ripe gonangia January, 1921. Hilton. Commonest 
hydroid. 
Aglaophenia pluma (Linn.) Lamx., Hist. Pol. Flex. 1816. 
Some very typical specimens of this species were taken from 
near the end of the pier at Huntington Beach, California. Readily 
distinguishable by striking contrast in color of dark stem and light- 
er hydrocladia. Rather tall. With corbulae in April, 1921. 
EUCOPIDAE: Colonial, either branched or simple; hydrothecae 
campanulate, stalked; aperture toothed or not; gonangium large 
usually in axil of branch, free medusae. 
Obelia commissuralis McCr. Gym. Charls. Harb., p. 95. 
High, sparsely branched colonies. Hydranth deeply campan- 
ulate. Pedicels annulate throughout, alternate. 
On live Mytilus with other hydroids. Long Beach Pier, not 
rare. December, 1920. 
Obelia geniculata (Linn.) Schulze. Nordsee Exped. 1872. p. 
Gy 
An abundant shore form everywhere. On Fucus inshore. La- 
guna Beach, Calif. January, 1921. No gonangia. 
Obelia gracilis Calkins. Some Hydroids of Puget Sound, 1899, 
De ooo. 
Some typical specimens were taken on stems of other hydroids 
from pier at Huntington Beach, California. No gonangia in April, 
1921. 
