LEPTOMEDUS.E TOXORCHIS, NETOCEKTi )1 in >. --".' 



Stomach, lips, gonads, and tentacle-bulbs are yellowish-brown, speckled with dark-red. 

 Exumhrella besprinkled with reddish-brown spots. 



Found bv Haeckel at the Canar}- Islands, Atlantic Ocean, in January. 1867. 



Toxorchis kellneri sp. nov. 

 Plate 28, figs, i an>l j. 



This medusa is named in honor of the author's assistant, Mr. Carl Kellner. whose copies 

 of figures ot medusae by previous authors appear as text-figures in tins work. 



Bell about 15 mm. wide, with moderately thin walls, thickest at center ot" bell and thin 

 at edges. When in a normal resting state the bell is somewhat higher than a hemisphere, 

 but when expanded it is slightly Hatter than a hemisphere. There are about $2 tentacles 

 with long, conical, tapering, hollow basal bulbs. The filiform shafts ot these tentacles are 

 highly contractile and normally i to 4. times as long as the bell-diameter, but may be con- 

 tracted so as to become about as short as the bell-radius. There are about 50 small clubs 

 upon the bell-margin between the tentacles; but no coiled cirri nor lithocysts. 1 here is a black 

 entodermal ocellus within ring-canal at base ot" each tentacle and marginal club. 



Velum well-developed, ring-canal narrow. Stomach about one-fourth as wide as bell- 

 diameter. 8 flat, wide radial-canals arise trom margin ol stomach, 45 apart. A short dis- 

 tance beyond the margin ot the stomach most ot these 8 primary radial-canals bifurcate. 

 Thus in the specimen here fimired n ot the 8 primary radial-canals are bifurcated and thus 

 14 slender radial-canals reached the marginal ring-canal. 



The manubrium is shallow, only about one-fourth as long as the depth ot the hell-cavity, 

 and there are 8 lanceolate lips with folded, curtain-like margins. These lips are in the radii 

 of the 8 main radial-canals. The gonads are developed upon the sides of the narrow outer 

 branches of the radial-canals and do not touch the ring-canal. 



Central stomach pink; gonads and tentacle-bulbs brownish-yellow; entodermal ocelli 

 very dark brown, almost black. 



Several specimens of this medusa were found in a surface tow at Tortugas. Florida, 

 on July 8, igo/. The figures represent a female. 



This species differs from Haeckel 's T. uriiintits ot the Canary Islands in its higher bell, 

 more numerous and more irregularly branching radial-canals, in the absence of marginal 

 cirri, and in color. Unfortunately, Haeckel had but one specimen, and I have seen only three, 

 and it is possible that future studies may show that the Canary Island medusa is identical 

 with the Tortugas form. 



Genus NETOCERTOIDES Mayer, 1900. 



NcloctrtoiJes, MAYER, 1900, Bull. Mus.Comp. Zool. at Harvard College, vol. 37, p. 45. MAAS, 1904, Sitzungsber. math.-phys. 

 Klasse kgl. Bayer. Akad. Wissenschaft., Bd. 34, p. 437. 



GENERIC CHARACTERS. 



Berenicidae with 8 main radial-canals, which bifurcate so that 16 canals reach the circular 

 vessel at bell-margin. There are 16 long, hollow, tapering tentacles, one at the end of each 

 radial-canal, and 16 to 25 short, cirrus-like tentacles, one or t\\o between each pair ol long 

 tentacles. The manubrium has 4 simple lips. The gonads are developed upon the sides of the 

 manubrium and upon the 8 main stems of the radial-canals. 



The type species is N. brachiatuiii Mayer, of the Bahamas and Tortugas, Florida. It 

 is the only species of the genus. 



Netocertoides brachiatum Mayer. 

 Plate 27, figs. 4-6. 



Nctocertoidei brachialum, MAYF.R, 1900, Bull. Mus. Comp. Zool. at Harvard College, vol. 37, p. 45, figs. 43-44, plate 18; 

 Memoirs Nat. Sci. Museum Brooklyn Institute Arts and Sci., vol. i, p. 12, fig. 7, plate I. 



Bell 4 to 5 mm. high, miter-shaped, walls quite thin. 10 hollow tapering tentacles; one 

 at base of each of the 16 radial-canals. 1 6 to 25 small tentacles, one or two between each pan 

 of long ones. Longest tentacles about one-fourth as long as bell-height, their ends tightly 



