56 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



Bucheilota bermudensis. 



Oceanopsis bermudensis, Fewkes, J. W., 1883, BulL Mus. Comp. Zool., VoL XI. p. 

 86, PL I. Figs. 8-10. 



Specific Cliaracters. — Adult medusa. The bell is not quite hemispherical, 

 the sides being relatively straight and sloping and the top quite flat. It is 

 about 6 mm. in diameter. There are 8 tentacles, 4 radial and 4 interradial. 

 These tentacles are only about one third as long as the bell diameter, and are 

 thickly covered with nematocysts. Their basal bulbs are large, and are each 

 flanked by a pair of short, coiled, nematocyst-bearing cirri. In addition to 

 these there are normally about 8 other cirri in each quadrant, and scattered 

 between them are 8 otocysts. Thus the medusa has 32 otocysts and 48 cirri. 

 Each otocyst is of small size and contains a single spherical otolith. The velum 

 is well developed. There are 4 straight, narrow, radial canals, and a simple 

 circular vessel. The proboscis is short, but wide, and there are 4 cruciform, 

 slightly recurved lips. There is no peduncle. The 4 gonads are found upon 

 the 4 radial canals near the proboscis. These are visible in young medusee 

 about 1.5 mm. in diameter; and in the adult they become quite large and 

 swollen, the ova being distinctly seen lying along the side of the canal. The 

 entoderm of the proboscis gonads and tentacle bulbs is grass green, and the 

 supporting lamella of the bell is tinged with the same color. This medusa was 

 quite common at the Tortugas, Florida, from June 17-25, 1899. 



Young Medusa. — The youngest medusa was about 2 mm. in height and 

 1.5 mm. in diameter. It was very much in the condition described by Fewkes, 

 1883. There were 4 simple radially situated tentacles and 4 interradial ten- 

 tacle bulbs. The interradial tentacle bulbs were flanked by lateral cirri, while 

 the radial tentacle bulbs lacked these appendages. There were 4 otocysts, one 

 upon the side of each of the interradial tentacle bulbs. Each otocyst contained 

 a single spherical otolith. The gonads were already quite large, and lay along 

 the 4 radial canals near the sides of the proboscis. The proboscis was short, 

 and there were 4 simple lips. 



Eucheilota paradoxica, nov. sp. 



Figs. 134-136, Plate 40. 



Specific Characters. — Adult medusa : the bell is somewhat fuller than a 

 hemisphere and is 4 mm. in diameter. The gelatinous substance is of moderate 

 thickness, and there is a very slight, blunt, aboral projection. There are 4 equally 

 developed, radially situated tentacles. These tentacles are about as long as 

 the bell height, but are usually carried coiled in a close helix. Their basal 

 bulbs are elongate, and are hollow. The shafts of these tentacles are thickly 

 covered with nematocysts. A pair of tightly coiled lateral cirri arise from the 

 sides of each tentacle bulb. In addition to these well-developed tentacles there 



