HYDROIDS OF THE HAWAIIAN ISLANDS. 
947 
This genus was originally defined by Busk. Allman revised it in his Challenger Report, page 37, 
as having scattered, sac-like gonangia. In 1900 Bedot, in his “Hydraires provenant des campagnes 
de 1’ Hirondelle, ” page 21, describes an allied form, Perisiphonia pectinata Allman, which has a true 
“coppinia” mass and also a few scattered gonangia. He suggests that these latter may be gonangia 
of a different sex from those in the “coppinia” mass, and cites my own description of the gonosome 
of Lafoea dumosa, in which the two sexes are present in the same colony. « 
This author also describes the gonosome of Cryptolaria conferla Allman, which is a true “coppinia” 
mass, and which Allman himself described, but afterwards considered as a parasitic organism not 
belonging to the species on which it was found. 6 
Cryptolaria pulchella Allman. 
This is one of the most abundant species in the collection. It was originally found in the Challenger 
collection, dredged near Honolulu. 
Distribution. — Station 3809, south coast of Oahu Island, 125 fathoms; station 3814, off Diamond 
Head, near Honolulu, 284 fathoms; station 3848, south coast of Molokai Island, 73 fathoms; station 
3849, south coast of Molokai Island, 73-43 fathoms; station 3858, between Molokai and Maui islands, 
128 fathoms; station 3859, between Molokai and Maui islands, 138 fathoms; station 3863, between 
Molokai and Maui islands, 127 fathoms; station 4068, northeast coast of Maui Island, 18 fathoms; 
station 4098, north coast of Maui Island, 95 fathoms; station 4101, between the islands of Maui and 
Molokai, 143 fathoms. 
Cryptolaria pulchella Allman, Challenger Report, The Hydroida, Part II, 40, 1888. 
Cryptolaria symmetrica Nutting, new species. 
(PL iv, fig. 2; pi. x, figs. 10, 11.) 
Trophosome. — Colony attaining a height of about 7 inches. Stem and branches fascicled 
throughout, main branches irregularly disposed, but on opposite sides of the stem, ultimate branches 
Subopposite, the whole structure being flabellate in form. Accessory tubes reaching to the tips of the 
ultimate branches. Hydrothecae springing from the axial tube and projecting between the accessory 
tubes, their distal ends curving gracefully outward, regularly alternating. The hydrothecse on the 
distal parts of the branches are without reduplication of margins; those on other parts of the colony 
have the margins extensively reduplicated, giving an appearance of extensive annulations. The 
-hydrothecse are much smaller than in other species of the genus that I have seen, are slender and 
graceful, and symmetrically disposed. 
; Gonosome. — Unknown. 
Distribution. — Station 3854, south coast of the island of Molokai, 134 fathoms; station 3863, 
between the islands of Molokai and Maui, 127 fathoms; station 3871, between the islands of Molokai 
and Lanai, 13 fathoms; station 3987, north of the island of Kauai, 55 fathoms; station 4079, north of 
the island of JVIaui, 143 fathoms; station 4100, between the islands of Maui and Molokai, 130 fathoms; 
station 4135, north of the island of Kauai, 225 fathoms. 
This species is of a golden yellow color and is one of the prettiest in the collection. By clearing 
with potash the connection between the hydrothecae and the axial tube can be demonstrated, as well 
as the fact that the hydrothecae are partly adnate. 
P Cryptolaria operculata Nutting, new species. 
(PI. hi, fig. 4; pi. x, figs. 12-14.) 
Trophosome. — Colony (incomplete) about 2 inches high, flabellate in form. Stem and all but 
ends of ultimate branches fascicled, the tubes being continuous with the cavities of the hydrothecae, 
there being no diaphragms nor pedicels. Branches irregularly disposed, the ultimate ones being 
subalternate. Hydrothecae tubular, curved, varying greatly in the extent of immersion and equal in 
caliber throughout; margins very thin and collapsible, ending in two opposite broad points, and 
aProc. U. S. Nat. Mus., Vol. XXI, 1899, 751. 
5 See Allman, Hydroids of the Gulf Stream, p. 17, 1877; and Challenger Report, The Hydroida, Part II, 38, 1888. 
