ANTHOMEDUS.E ZANCLKA. XAM MXH'SIS. 



91 



nematocysts. These long tentacles are 1.5 times as long as the bell-diameter. There are also 

 2 small, conical tentacles 90 apart from the long ones. The small tentacles do not give rise 

 to side-filaments. No ocelli. A ridge of nematocyst-cells extends from the base ot each ten- 

 tacle about half-way up the side of the exumbrella. Velum broad. There arc 4 broad radial- 

 canals and a narrow circular tube. The outline of the bell-cavity does not follow that of 

 the outer surface of the bell, but is widest at the inner apex. Manubrium conical, with a wide- 

 proximal base and regularly-narrowing sides. It does not extend quite to the level ot the 

 velar opening. The 4 lips are quite prominent, and the mouth is a rectangular opennm. 

 The mouth is surrounded by 2 or 3 rows of large nematocyst-cells, similar to those found 

 upon the sides of the exumbrella. The gonad is developed upon the sides of the stomach, 

 which it encircles. The tentacles are light-brown in color, and the entoderm at their bases 

 contains orange pigment. There are bright-yellow pigment-spots at the bases ot the two 

 rudimentary tentacles. This species was found at Xahant, Massachusetts, in 1862, by Dr. 



Alexander Agassiz. Nutting, 1901, obtained 

 it at Woods Hole, Massachusetts, in August, 

 1899. Neither of these observers states the 

 dimensions of the medusa. 



The peculiar outline ot the subumbrella 

 and the constriction above the lips figured 

 by A. Agassiz may be due to unnatural 

 contraction. 



Many of the characters of this so-called 

 remain in doubt. 



species 



Zanclea nitida. 



Gtmmaria nitida, HARTLAI B, 1905, Zoolog. Jahrbiichrrn. 

 Suppl. 6, p. 527, fign. J, H (hydroid). 



PolvpitesaboutS mm. long. Club-shaped 



rio. 44. Zanclea ini[>lc\a, after Hartlaub, in Norillschcs rlankton. - ' . 



to cylindrical, with about 50 short knobbed 



tentacles, irregularly distributed. Hypostome short and flatly conical. Each polvpite IK i 

 i to 3 clusters of small medusa-buds. These are borne upon short branching stems which 

 arise between the tentacles near the lower, basal part of the polypite. The condition of the 

 medusa is not described. Found at Juan Fernandez Island, off the Pacific coast of South 

 America. 



Genus ZANCLEOPSIS Hartlaub, 1907. 

 ZancleopaSf HARTLAUB, 1907, Nordisches Plankton, Nr. 12, pp. 115, 116. 



GENERIC CHARACTERS. 



Cladonemidae related to Zandca, but with large, stout, lateral branches on the tentacles. 

 With ectodermal ocelli upon the tentacle-bulbs, and without meridional clusters of nemato- 

 cysts upon the exumbrella. 



The type species, and only known form, is Zancleopsis Jichotorna, from Tortugas, Florida, 

 described by Mayer under the name Gemimirni Jn-hotvma. 



This genus is distinguished from Zatiflra by the large lateral branches upon its tentacles, 

 and by the absence of nettle-cell tracts upon the exumbrella. Also, it has <j> < Hi, and these 

 are not known in Y.nnclea. 



Zancleopsis dichotoma Hartlaub. 

 Plate 8, fig. i. 



Gtmmaria dichotoma, MAYER, 1900, Bull. Mus. Comp. Zool. at Harvard College, vol. 37, p. 35, plate 17, fig. 40. 

 Zancleoftsis dichotoma, H^RTLArn, 1907, Nordisches Plankton, Nr. 12, p. 115, fig. 105. 



Bell miter-shaped, with thin walls, and solid apical projection. 3 mm. high and about 

 2.5 mm. wide. There are 2 rudimentary tentacle-bulbs and 2 well-developed, diametrically 

 opposed tentacles. These long tentacles are of unequal length, one being about as long as 



