MEDUSAE OF THE HAWAIIAN ISLANDS. 
1141 
Record of Hawaiian specimens. 
Num- 
ber of 
speci- 
mens. 
Date. 
Station. 
Geographical position. 
Depth. 
Remarks. 
2 
1902. 
Mar. 17 
3797 
31° 55' N.; 136° W 
Fathoms. 
Surface 
One small, one of medium size. 
Large". 
Do. 
2 
May 6 
May 11 
May 13 
May 15 
May 16 
June 17 
3913 
3927 
Diamond Head, Oahu Island 
21° 31' N.; 161° 55' W 
do 
do 
3929 
23° 19' N.; 166° 54' W 
do 
Do. 
3 
3930 
25° 07' N. ; 171° 50' W . . . 
do . . 
Small, medium size. 
Some small, some large. 
One specimen was 28 mm. in diameter, and was 
the largest found by the Albatross. 
Medium size. 
6 
3932 
Laysan Island 
do 
g 
4009 
Between Kauai and Oahu 
islands 
do 
4037 
West coast of Hawaii 
do 
15 
(?) 
(?) 
(?) 
(?) 
Well preserved large specimens, no label. 
CTEN0PH0R2E. 
Genus HORMIPHORA L. Agassiz. 
Generic characters: Cydippidse with hook-shaped tentacle-sheaths placed close by the sides of the 
stomach. These sheaths open to the outside at the level of the funnel or between this and the apical 
sense organ. The tentacles have side branches, some of which are usually hand-shaped. 
Hormiphora fusiformis Moser. 
PI. in, fig. 12. 
Lampetia fusiformis Agassiz and Mayer, Mem. Mus. Comp. Zool., vol. xxvi, 1902, no. 3, p. 171, pi. 13, figs. 59, 60. 
Hormiphora fusiformis Moser, F., Die Ctenopboren, Siboga-Expeditie, monog. 12, 1903, p. 12, Leiden. 
This ctenophore was first described by Agassiz and Mayer from the Marquesas and Paumotu 
Islands, where it was obtained by the Albatross in 1900. 
Moser (1903) rightly calls attention to the fact that it approaches much more nearly to the genus 
Hormiphora than to Lampetia. However, it possesses the feathered tentacles seen in Lampetia and Pleuro- 
brachia, and lacks the characteristic hand-shaped appendages of the tentacles seen in Hormiphora. 
The body is also far more elongate than in any previously described Hormiphora. It has, however, 
the peculiar hooked tentacle sheaths close to the sides of the stomach, such as are found in Homiphora. 
It seems probable that when the Ctenophoree come to be revised it will be found convenient to place 
this form in a new genus. This, however, we hesitate to do at present. 
Specific characters: The body is spindle-shaped, about 40 mm. long and 15 mm. wide in the tentac- 
ular diameter. It exhibits considerable lateral compression, the tentacular diameter being about half 
again as long as the thickness in the opposite direction. The apical sense organ contains a spherical 
mass of transparent otoliths. The eight meridional vessels extend not quite two-thirds the distance 
down the sides of the body from the apical sense organ. They are straight and end blindly below. 
There are about 40 combs of cilia upon each meridional vessel. These extend along almost the entire 
length of each canal. The two lateral tentacles arise from long, narrow clefts, close to the sides of 
the stomach. These tentacle sheaths, or clefts, open upon the sides of the body about midway 
between the apical sense organ and the base of the funnel, and they extend down close to the sides 
of the stomach about one-quarter the length of the animal above the mouth. The tentacles are 
highly contractile and are provided with simple lateral filaments, such as are seen in the genus 
Pleurobrachia, except that they are much less numerous. The mouth is a narrow slit, capable of no 
great expansion. The stomach is long, flat, and narrow, and it gives rise to two simple, straight- 
edged canals which extend down either side of the stomach to very near the level of the mouth open- 
ing. The funnel canal, and the radiating vessels that connect the stomach with the meridional vessels 
are broad and straight. The tentacles are milky in color, the stomach faint, steely blue, and all other 
parts of a glassy clearness. 
