MEDUS2E OE THE HAWAIIAN ISLANDS. 
1135 
small gastric cirri. The manubrium is flat and wide, and 4 large, wide, flat, radial pouches extend 
outward from the stomach. These are partially separated one from another by 4 narrow, interradial 
partitions, extending from the corners of the stomach to the base of the pedalia. The radial pouches 
are in communication one with another^ only through the axial cavities of the pedalia. The 8 gonads 
are leaf-like, and are attached to the sides of the 4 interradial partitions, from which they project into 
the cavities of the radial pouches. They extend along the entire length of each interradial partition. 
Each gonad is widest near the region of the stomach, and tapers gradually to the region of the peda- 
lium, so that each pair of gonads attached to the same interradial partition presents a pyriform 
outline. (Fig. 1, pi. i. ) The gelatinous substance of the bell is hyaline, the entodermal parts being 
milky. According to Haacke’s description, the flexible shafts of the tentacles and the interradial 
gastric cirri are dull pink. 
The gonads begin to develop when the medusa’s bell is only 11 mm. high, and are large in 
medusa; in which the bell is 15 mm. high. The relatively wide, flat-topped bell is characteristic of 
this medusa in all stages, from those 11 mm. high to maturity, when the bell is fully 35 mm. in height. 
This medusa was obtained by Haacke (1887) in the Gulf of St. Vincent, South Australia, in South 
latitude 35°. Forty-one specimens were obtained by the Albatross, 16 of these being caught at night 
by means of a net and an electric light, near the surface off the wharf at Honolulu. 
Record of Hawaiian specimens. 
No. of 
speci- 
mens. 
Date. 
Station. 
Geographical po- 
sition. 
Depth. 
Remarks. 
1902. 
July 19 
4067 
Puniawa Point, 
Maui Island, 
do . 
Fathoms. 
10-14 
All one-half to one-third grown. 
All about 12 mm. high, with small gonads 
about 4 mm. wide. 
All about 14 mm. high, with well-developed 
gonads. 
Caught by aid of electric light, in dip net, 
15 
.do 
4068 
14-18 
4 
16 
do 
Mar. 30, night . 
4069 
Wharf at Honolulu. . . 
do 
Island of Oahu . . . 
18-23 
Surface. 
3 
June 23 
Hanalei 
Island of Kauai . . 
at night. All well-grown medusae with 
bells about 35 mm. high. One of these 
figured. 
All of medium size. 
Charybdea moseri, new species. 
PI. I, figs. 2-2c. 
? Semper, C., Zeit. fiir Wissen. Zool., bd. xm, 1863, taf. 39., fig. 9. 
This species is named in honor of Capt. Jefferson F. Moser, U. S. N., formerly commander of the 
Albatross. 
The bell in large medusae is about 80 mm. high and 47 mm. wide. The pedalia arise from the 4 
interradial corners of the base of the bell as four short stalks, each of which gives rise to a wide flat 
spatula-like expansion, from which arises the long flexible portion of the tentacle. These tentacles 
are ringed at close intervals with clusters of nematocysts. They are hollow, and the canal, which 
connects their lumen with the gastro-vascular cavity of the bell, extends through the ring-like, flat, 
expanded portion of the pedalium. The basal stalks of the pedalia are only about 3 mm. long, the 
flat spatula-shaped, or wing-like, portion is 18 mm. long and 16 mm. wide, while the flexible parts of 
the tentacles are each about 80 mm. long. 
There are 4 radially situated, club-shaped sense organs, each in a wide cleft-like niche, about 15 
mm. above the margin of the velarium. The sensory part of each sense-club is pear-shaped and bears 
an entodermal, abaxial mass of otoliths, and four ectodermal ocelli. Two of these are large, and are 
provided with double convex lenses, while the other two are lateral and are mere pigment spots. The 
eyes are so arranged as to be directed toward the interior of the bell. (Figs. 2b, 2c) . 
The velarium is quite wide, and is supported at its 4 radial points by bracket-like frenulse. Twenty- 
four simple non-branching diverticula;, 6 in each quadrant, extend from the gastro-vascular space of 
the bell into the velarium. (Fig. 2a). 
F. C. B. 1903, Pt. 3—24 
