HYDROIDS OF THE HAWAIIAN ISLANDS. 
945 
Calycella syringa (Linnseus). 
Locality. — Station 4098, north coast of Mani Island, 95 fathoms. 
This is the only specimen of this well-known species that I have found in the collection. 
Sertularia syringa Linnaeus, Syst. Nat., 1311, 1767. 
Family LAFOEIDA}. 
Trophosome. — Stem fascicled, consisting of an axial and several peripheral tubes, or else simple and 
consisting of a creeping rootstock. Hydrothecae tubular, without operculum. Hydranths with a 
conical proboscis. 
Gonosome. — Gonangia aggregated in groups or masses called “ coppinia ” masses. This family was 
described by Hincks in 1868. In 1888 Allman, in his Challenger Report, instituted the family Peri- 
siphonidse, in which the first or type genus was Lafoea, the type of Hincks’ s family Lafoeidae. This 
latter fact justifies us in retaining the family Lafoeidae, modified, however, by the introduction of the 
character of the stem, which was first fully appreciated by Allman. 
Genus LAFOEA. 
Trophosome. — Stem polysiphonic. Hydrothecae tubular, without diaphragm, and never adnate to 
the axial tube. 
Gonosome. — A true “ coppinia” mass, gonangia flask-shaped, with a single terminal aperture. 
Lafoea dumosa (Fleming). 
This widely distributed species was found at three stations, namely: Station 3824, south coast of 
Molokai Island, 228-498 fathoms; station 3859, between the islands of Molokai and Maui, 138 fathoms; 
station 4101, between the islands of Maui and Molokai, 143 fathoms. 
Sertularia dumosa Fleming, Edinburgh Phil. Jour. , 1820, II, 83. 
Lafoea fruticosa (Sars). 
Fine specimens of this species, with the gonosome well developed, were secured at station 4079, 
near Maui Island, 143 fathoms. Others were secured at station 4066, northeast coast of Hawaii Island, 
176 fathoms, and at station 4077, between Hawaii and Maui islands, 99 fathoms. 
“ Campanularia fruticosa” Sars, Reise i Lofoten og Fimnarken, 18, 1850. 
Lafoea contorta Nutting, new species. 
(PI. hi, fig. 6; pi. ix, figs. 8, 9.) 
Trophosome. — Colony parasitic, growing from a twisted rootstock. Hydro thecae sessile, tubular, 
very long, and often bent and twisted in various ways; aperture round; margin slightly everted and 
often many times reduplicated. No operculum nor hydrothecal septum. 
Gonosome. — Not known. 
Distribution. — Station 3949, north of Laysan Island, 59 fathoms; station 4102, between the islands 
of Maui and Molokai, 122 fathoms. 
The hydrothecae are longer in proportion to their width in this species than in any other that I 
have seen, and the extent of reduplication of the margins imparts a highly ornamental effect. 
Genus LICTORELLA. 
Trophosome. — Stem fascicled. Hydro thecae pedunculate, never adnate to the axial tube, diaphragm 
usually present. Nematophores often found on branches just below the hydrothecae. 
Gonosome. — Gonangia aggregated, with curiously protuberant “shoulders” on one or two sides of 
the distal end. These are horn -like processes which may curve upward, or downward, or be directed 
straight outward, according to the species. 
