REPORT ON THE SIPHONOPHOR^. 335 



of Siphonophorse) was introduced by Carl Vogt (6), who in 1854 gave the name 

 Epibulia auranliaca to a Calyconect, which had been named Galeolaria by Blain- 

 ville seventeen years before (24, p. 139). Compare our Genus 26. Since also many 

 succeeding authors had retained the name Epibulia in the sense of Vogt, I followed 

 their example in my System, and had called the above mentioned species of Brandt, &c, 

 Arethusa (95, p. 35). But considering now more accurately the rules of priority, I 

 find it much more justifiable to employ the name Epibulia in the sense of the older 

 authors, Eschscholtz and Brandt. 



Epibulia ritteriana, n. sp. (PI. XXII. figs. 6-8). 



Arethusa hr achy soma, Hkl., System der Sipkonophoren, p. 46. 

 Habitat. — Indian Ocean, Ceylon, off Belligemma, January 1882 (Haeckel). 



Corm. — The complete corm of this beautiful Cystonect, which I captured in the living 



state, off Belligemma, Ceylon, and which is figured in PI. XXII. fig. 6, four times enlarged, 



had in this fully expanded state a diameter of 30 mm. to 40 mm., in the contracted state 



scarcely one-fourth of that size. All parts of the body were splendidly coloured, the large 



ovate pneumatophore light red, with a purple pigment-cap in the apical third ; the 



corona of palpons rose, the siphons and the tentacles yellow, and the gonodendra purple. 



The vivid motions of this delicate Siphonophore, the variable play of the tasting palpons, 



the feeding siphons, and the capturing filaments, offered a most splendid aspect. The 



number of cormidia composing the corm was eight ; four siphons and tentacles, and four 



large gonodendra were fully developed, two others (smaller) half developed, and two very 



small and young. The number of palpons, however, which composed the corona beyond 



the apical pneumatophore, was very large, forty to sixty or more, beside many young 



buds, so that six to ten palpons may belong to each cormidium. All these parts of the 



siphosome were so arranged around its vesicular axial trunk, that the palpons occupied 



the proximal, the siphons the distal part of the cormidium, and the gonodendra were 



attached between them (as in the Anthophysidse and Discolabidpe) ; but usually the 



siphons were more or less protruded, so that the gonodendra appeared to occupy the 



central base of the corm. Unfortunately, I was not able to examine closely the form of 



the central trunk of the siphosome, and the mode of attachment to the cormidia ; 



probably it is similar to that of the Anthophysidse, Discolabidse, and Nectalidae ; all that 



I could observe of the trunk was that it represented a shortly conical or ovate bladder, 



coiled up in a spiral, with a single dexiotropic turning. 



Pneumatophore (PI. XXII. fig. 6, p, in profile ; fig. 7, in vertical section through the 

 axis ; fig. 8, transverse section). — The great float filled with air is ovate, and has a 

 diameter of 10 to 12 mm. in the expanded state; in the contracted state, however, 



