MUSEUM OF COMPAllATIVE ZOOLOGY. 239 



otocysts were now twelve in number. The tentacles in. this individual had de- 

 veloped somewhat abnormally, so that there were twenty-seven of them. These 

 tentacles exhibited regular rings of nettle cells, very similar in arrangement to 

 those upon the tentacles of Cubaia Aphrodite. There were bright green pig- 

 ment spots at the bases of the tentacles in the entoderm. 



The oldest specimen (Plate I. Fig. 4) was captured near Great Abaco Island, 

 Little Bahama Bank, on March 9th. The bell was 2 mm. high and hemi- 

 spherical in shape. The most remarkable change was the development of the 

 peduncle of the manubrium, which now hung down for about a quarter of the 

 height of the bell cavity. The genital organs began to appear upon the radial 

 canals in the highest part of the bell cavity. There were twelve otocysts and 

 thirty-two tentacles, eight in each quadrant. A drawing of the otocyst is shown 

 in Plate I. Fig. 6 



Other Hydro- Medusae which have been previously described were found 

 during the expedition. Among these was Aglaura vitrea (Fewkes), a single 

 specimen of which was taken in Nassau Harbor and at Grand Turk Island. 

 Fewkes has given a good description and a fair figure of this species. We also 

 captured specimens of Tauioia at Nassau and at Grand Turk Island. Modeeria 

 multitentacula was found on the Little Bahama Bank early in March. This 

 species is common at Newport, R. I. 



Eirene ccerulm (L. Agas.), Rhegmatodes floridanus (L. Ag.), Glossocodon 

 tenuirostris (L. Ag.), Oceanica languida (L. Ag.), were met with at various 

 places. 



Among the Dj'scophorse the following species are worthy of notice. Linerges 

 mercurius (Haeckel), found on the Great Bahama Bank at Nassau. Aurelia 

 aurita ? and Dactylometra lactea (L. Ag.) were very abundant in the harbor of 

 Havana during the last week in P^bruary. Among the Ctenophorae was Idiopsis 

 Clarkii, which was found off the coast of Cuba, in the Gulf Stream, in the mid- 

 dle of February. 



SIPHONOPHOR^. 

 Cannophysa Eysenhardtii. 



Plate III. Figs. 1, 2, 4. 



A number of specimens of the Siphonophore, described by Fewkes as belong- 

 ing to the genus Rhizophysa (Fewkes, " On a few Medusae from the Bermudas," 

 Bull. Mus. Comp. Zool. Hirvard College, Vol. XL No.^ 3), were captured 

 during the cruise. Dr. Fewkes gives a good description and a very poor 

 sketch, which is apparently intended to represent R. Eysenhardtii. In our 

 opinion it would be better to adopt the nomenclature of Haeckel, and give to 

 this species the name of Cannophysa, as it is evidently very closely allied to, if 

 not identical with, Cannophysa Mvrrayana from the Canary Islands. (See 

 Plate XXIV., SiphonophorsB of the Challenger Expedition.) The pneumato- 



