ANTHOMEDUSjE CALYCOP818. 



131 



Calycopsis typa Fewkes. 



(,Wv<'//m< t\f><i, l''>.wKts, lSS2, Bull. Mus. Comp. Zool. at Harvard College, vol. 9, p. 304, platr i, fig. 54. 



Bell higher than a hemisphere, with evenly rounded top and vertical sides. External 

 surface smooth, bell-walls thin, thicker above than near the margin. Size ( ?) There are 16 

 radial-canals and 16 marginal tentacles, one at the base of each canal. These tentacles are 



about as long as the bell-height and are flexible with some- 

 what club-shaped outer ends and very small basal bulbs. 

 No lithocysts or marginal bodies other than the id ten- 

 tacles. The stomach is very wide and fills almost the whole 

 ot the inner half of the bell-cavity. The gonads are devel- 

 oped upon the sides of the stomach and appear as a series 

 of transverse, leaf-like ndges on both sides of each of the 4 

 principal radial lines of the stomach. They are thus 

 adradial in position and their manner of folding resembles 

 the condition seen in the gonads of Turns. The sides of 

 the stomach are bound to the subumbrella by 4 radially 

 situated partitions. There are 16 straight, narrow radial- 

 canals: 4 of these are perradial, 4 are mterradial, and 8 

 adradial. In alcoholic specimens the ovaries were dark- 

 brown. Tentacles and bell-walls white with a tinge of 

 bluish color. 



4 specimens were found by the Allxitross, in 1880 81, 

 off the Atlantic coast of the United States, in deep water along the Gulf Stream. 

 Form of lips ( ?) Size ( ?) Ocelli ( ?) 



Fi(i. 70. Cai\rof>si* t\f>ti, after Fewkes, in 

 Bull. Museum Comp. Zoo), at 

 Harvard College. 



Subfamily MARGELIN^ Haeckel, 1879. 



Oceanidx with oral tentacles and with 4 simple, unhranched radial-canals. Gonads 

 on the mterradial, or adradial sides of the manubnum; the mature genital products are 

 tound in the ectoderm. 



i . Tribe Cvttftdi: 



Marginal tentacles arise singly from bell-margin and are not grouped into clusters. Oral tentacles are unbranched, simple, or 



degenerate. They are found in all forms excepting in the degenerate medusa; of Stvlactis. 

 Cyttris, ESCHSCHOLTZ, 1829. Cyt<ris+ Cubogaster HAECKEL. 4 marginal tentacles. Oral tentacles present. Hydroid 



unknown. 

 Podocorvne, SARS, 1846 = Dysmorf>hosa Cytcrandra HAECKEL, 1879. 8 or more marginal tentacles. Oral tentacles 



present. When present the peduncle is solid. Hydroid: Podocorynt. 



Turritopsis, McCRADY, 1856. 8 or more marginal tentacles. Entodermal walls of the 4 radial-canals, above stomach, 

 are composed of highly vacuolated cells forming a peduncle. Mouth studded with a row of nematocyst-bearing 

 knobs. Hydroid: Dendroclara. 

 Oceania, sens., KOLLIKER, 1853; GECJENBAUR, 1856. Medusa similar to Turritopsh, but with a simple, solid, gelatinous 



(not vacuolated) peduncle. Hydroid: Clava-like. 



Stvlactis, ALLMAN, 1864, degenerate medusae with 4 to 8 rudimentary marginal tentacles and no oral tentacles. Medusa: 

 mature upon liberation from hydroid. Hydroid: Stylactts; closely related to Podocoryne. 



2. Tribe Thamnostomeidi: 



With branching oral tentacles. With simple marginal tentacles, not grouped in clusters. 



Thamnost\ltis, HAECKEL, 1879. 2 diametrically opposed, marginal tentacles. Development unknown. 

 Thamnitis, HAECKEL, 1879. 4 radially situated, marginal tentacles. Development unknown. 



L\mnorea, PERON and LESUEUR, i8og= Ltmnorea+ Thamnostoma, HAECKEL, 1879. 8 or more marginal tentacles. 

 Development unknown. 



3. Tribe BougatnviUidi: 



Marginal tentacles grouped into clusters. Each cluster consisting of 2 or more tentacles. The 4 oral tentacles may be simple 



or branched. 

 Bougainvillia, LESSON, 1836= Margflis + Lizusa Hippocrene, HAECKKL, 1879. With branching, oral tentacles. With 4 



radially situated clusters of marginal tentacles, all of one sort. Hydroid: Bougainvillia. 

 Ntniopsis, L. AGASSIZ, 1849. With branched oral tentacles. With 4 radially placed clusters of marginal tentacles, 



consisting of a median pair of club-shaped tentacles and a number of lateral filiform tentacles in each cluster. 



Hydroid: Bougainvillia, 

 Ratfikfti, BRANDT, 1857 = Mnr^fll turner Lizzia+ Lizztlla+ Rathkeu, HAM-KM., 1^79- With X dusters of marginal ten- 



tacles. Mature hydroid unknown. 

 Cfiiarella t MAAS, 1X97. With 16 (8 double) clusters of marginal tentacles. Circular can.il gi\rs off 4 intrrradi.il, blindly 



ending, centripetal branches. 



