AXTHO.MKIH S.t PODOCOK YNK. 141 



knob-like cluster ot nematocysts. Several medusa-buds in various stages of development 

 are found upon the sides of the upper interradial regions of the stomach. These budded 

 medusae are set free as in P. fulgurans. 



In some specimens the entoderm of the manubrium and tentacle-bulbs is turquoise-blue 

 and in others it is lilac. 



This medusa was abundant at Tortugas, Florida, in the middle of July, 1898, and Trinci 

 finds a very similar medusa at Naples, Italy. I am inclined to regard Trinci's C.\t,i-n minima 

 as the immature, 4-tentacled, medusa-budding stage of Podocoryne niniuta. According to 

 Trinci the bell is pyriform, 0.27 to 0.33 mm. high and 0.2 to 0.24 mm. wide. 4 perradial, 

 marginal tentacles, each as long as the hell-diameter, with well-developed basal bulbs without 

 ectodermal ocelli. Manubrium and tentacles yellowish-brown with blue in the entoderm. 

 Medusa-buds develop upon the 4 interradial sides of the manubrium. These budding medusae 

 are formed entirely from the ectoderm of the parent medusa. 



Trinci in the following year found a medusa similar to the above, but with 8 marginal 

 tentacles.. Excepting for a slight color difference this 8-tentacled medusa is identical with 

 I', mi nut a from Tortugas, Florida. 



Podocoryne tenuis. 



Dysmorphosa tenuis, BROWNK, 1901, Annah and Mag. Nat. Hist., ser. 7, vol. 9, p. 277. 



(? ?) Podocor ynt liumilis (hydroid), HARTLAVR, 1905, Zoning. Jahrbuchern, Suppl. 6, p. 523, fig. i. 



Umbrella somewhat conical, 2 mm. high and 1.5 wide. There is a slight constriction 

 above the level of the subumbrella cavity. 8 tentacles. Manubrium cubical and mounted 

 upon a peduncle about as long as itself. Mouth with 4 lips having terminal clusters of nemato- 

 cysts. Medusa-buds are found upon the interradial sides of the manubrium. (ionads not 

 developed in the two specimens studied by Browne. Color ( ?) 



Found at Stanley Harbor, Falkland Islands. Briefly described without figures by Browne. 

 This medusa appears to differ widely from the North American variety of Podocoryne 

 i ni urn, but the hydroid described by Hartlaub bears a close resemblance to our North Ameri- 

 can P. canifii. Hartlaub's hydroid may not be the stock of P. trntit>. however. 



Podocoryne dubia Mayer. 



Plate 14, figs. 7 to 9. 

 D \smor phasa Jubiu, MAYLR, 1900, Bull. Mus. Cuinp. Zool. at Harvard College, vol. 37, p. 40, plate 21, figs. (14-66. 



Bell higher than a hemisphere, 1.5 mm. high and three-fourths-egg-shaped, with thin, 

 uniform, flexible walls. There are 8 stiff", marginal tentacles which are club-shaped, being 

 somewhat wider near their ends than they are near their basal bulbs. The outer extremities 

 of the tentacles are thickly covered with nematocysts. Their basal bulbs are large and swollen, 

 and a very large, black ocellus is found in the ectoderm ot the under side of each bulb (plate 14, 

 fig. 9). The velum is well-developed. There are 4 straight, narrow radial-canals and a ring- 

 canal. At the middle point in the length of each radial-canal there is a small, hernia-like 

 swelling, which is probably glandular and similar in structure to the swollen parts of the 

 radial-canals of Lymnorea alexanJn. 



The manubrium is pear-shaped, quite slender, and extends about half the distance from 

 the inner apex of the bell-cavity to the velar opening. The mouth is surrounded by 4 short, 

 radially situated, oral tentacles, each of which terminates in a bristling cluster ot nematocysts 

 (plate 14, fig. 8). Cionads ( ?) The entoderm ot the manubrium and tentacle-bulbs is 

 delicate custard-yellow. Only one specimen has been found. This was taken on the surface 

 at Tortugas, Florida, on July 20, 1898. 



Podocoryne gracilis. 

 Plate 1 6, figs, i to 3. 



C\i.rii gracilis, IWAYtR, njoo, Bull. Mu^. I'oinp. Zool. at Harvard College-, vol. 37, p. -,'i, plat.- -,'.. tig' . 11: 1:4. 

 Dysmwphosa ^rarilis, MAAS, 1905, Craspedoten Medusen der 5jfrod Expedition, Monog. 10, p. 8. 



Matur,- iiifJusa. Bell pyriform or dome-like with a slight apical pro|ection. It is about 

 $ mm. in diameter and a little broader than it is high. The gelatinous substance is of only 

 moderate thickness on the sides, although it is about twice this thickness at the apex of the 



