34 University of California Publications. | ZooLoGy 
just below supracalycine nematophores and one just above floor of hydro- 
theea. . 
Gonosome. Corbulae 3 to 4 times as long as broad, formed of 8-10 
pairs of alternating leaflets, 8 nematophores on anterior edge of all but 
first and last. One, rarely two hydrothecae on anterior edge of all but 
first and last. One, rarely two hydrothecae between corbula and stem. 
Gonophores in two rows, about 12 in number. 
Distribution. San Diego Bay, 1-7 fathoms; False Bay. The 
corbulae on the False Bay colonies, collected in January, 1904, 
are longer than that figured in my previous paper, collected in 
July, 1901; usually with ten leaflets. 
36 Aglaophenia inconspicua. 
Agiaophenia inconspicua, Torrey, 1902, p. 73, pl. 9, figs. 87-89. 
Trophosome. Stems stout, in clusters, 35-40 mm. high; divided by 
antero-posteriorly oblique nodes into internodes as broad as long. Hydro- 
cladia borne on same side of stem, alternate, one from each internode, 3-4 
mm. long; divided transversely into equal internodes. A nematophore in 
the axil of each hydrocladium and two at its base in a line parallel with 
its axis. Hydrothecae deep, slightly compressed, free for not more than 
one quarter their length; 9 marginal teeth, median tooth recurved, the 
next on each side longest. Intrathecal ridge extending obliquely upward 
from near base of theca. Two ridges on each internode. Mesial nemato- 
phore reaching nearly or quite to the mouth of the theca. Supracalycine 
nematophores divergent, not reaching level of mouth of theca. 
Gonosome. Corbulae not more than twice as long as deep, arched, 
slightly compressed; formed of 4 to 6 leaflets, the longest with 10 nemato- 
phores on distal edge and occasionally one or two on proximal edge near 
tip. One theeate internode between corbula and stem. Sporosacs 6-12. 
Distribution. San Diego, 5 fathoms; gonosome present, 
July, 1901. 
37. Aglaophenia pluma (Linn.). 
Sertularia pluma, Linnaeus, 1767, p. 1309. 
Aglaophenia pluma, Lamouroux, 1816, p. 170. 
Aglaophenia pluma, Hincks, 1868, p. 286, pl. 63, fig. 1. 
Aglaophenia pluma, Torrey, 1902, p. 73, pl. 10, figs. 90-91. 
Trophosome. Stems attaining height of 100 mm. or more, grace- 
fully rising from creeping stolon. Hydrocladia alternate, one to an inter- 
node. Hydrothecae each with 9 teeth, median tooth not recurved. Mesial 
nematophore not reaching level of aperture. 
Gonosome. Corbulae of about 9 leaflets, arched; a single hydro- 
theca at base of each. 
Distribution. Off Coronado, Cal., on kelp. South Africa, 
Belgium, Mediterranean, Gt. Britain (Hincks). 
