10 University of California Publications. | ZooLoGy 
for one third or one fourth of its length; thickest near proximal end, taper- 
ing gradually into a narrow neck which supports the hydranth. Latter 
with 18 to 30 proximal tentacles in one whorl, with a span of about 2.5 
em.; distal tentacles more than twice as numerous, more or less irregularly 
placed around the mouth in several whorls. 
Gonosome. Gonophores medusoid, permanently fixed to peduncles 
springing from the base of the proboscis just within the whorl of proximal 
tentacles, each with a ring and 4 radial canals, and a manubrium at least 
twice as long as the bell, without a mouth; tentacles wanting; velum may 
be present or absent. 
Distribution. San Diego and San Pedro, Cal., throughout the 
year, between tides, on sand flats. Eggs laid in May, June, July. 
Gen. Tubularia, Linnaeus, 1767. 
8. Tubularia crocea (Ag.). 
Parypha crocea, L. Agassiz, 1862, III, p. 249, pls. 23, 23a, figs. 1-7. 
Parypha microcephala, A. Agassiz, 1865, p. 195. 
Tubularia crocea (Ag.), Allman, 1871, p. 416. 
Tubularia elegans, Clark, 1876a, p. 253, pl. 38, fig. 2. 
Tubularia crocea, Torrey, 1902, p. 43, pl. 2, Figs. 22, 23. 
Trophosome. Colony usually a bushy mass of stems, tangled below, 
which may be 10 em. long and may occasionally branch. Hydranths with 
not more than 25 proximal tentacles. 
Gonosome. Gonophores borne in pendulous clusters on peduncles 
arising between proximal and distal tentacles; with 6 to 10 flattened pro- 
cesses, varying in size, more prominent in female, sometimes hardly visible 
in male. 
Distribution. San Diego Bay, San Pedro Harbor, and San 
Francisco Bay, Cal. Eastern United States (Agassiz). 
CALYPTOBLASTEA. 
Fam. HALECIIDAE. 
Gen. Halecium, Oken, 1816. 
9. Halecium annulatum. 
Halecium annulatum, Torrey, 1902, p. 49, pl. 3, figs. 30, 31. 
Trophosome. Stems rising from a creeping hydrorhiza to a height 
of 7 mm.; the longer have 2 regularly alternating branches. Stem and 
branches more or less regularly annulated throughout. Hydrothecae may 
be half as deep as broad; margin everted. Sessile hydrothecae alternately 
on either side of stem or branch; peduncles arising within these carry 
other hydrothecae which may also give rise to other peduncles. 
Gonosome. Female gonangia broadly ovate, excessively compressed, 
with terminal aperture. Single gonophore with numerous ova, surrounded 
by blastostylar processes reaching to gonangial wall. 
