4 BULLETIN: MUSEUM OF COMPAKATIVE ZOOLOGY. 



one finds the gonads. There are 4 broad radial tubes and a broad circular 

 vessel with somewhat jagged outlines. The velum is well developed. The 

 color of the proboscis in the male varies from intense green to dull ochre- 

 yellow, or cream-color ; and the basal bulbs of the tentacles vary from faint to 

 deep purple. In the females, the proboscis and tentacle bulls are usually 

 dull ochre-yellow, or cream-color, but in some few individuals the proboscis 

 is faintly straw-colored, and the tentacle bulbs faint purple. In the female the 

 apical projection of the bell is hollow, while in the male it is usually solid. 



Common at Newport, Rhode Island, from July 15-September. Rare at 

 Charleston, South Carolina. 



The young medusa resembles the adult excepting that the apical projection 

 to the bell is wanting, or is but little developed. There are 2 tentacles and 2 

 rudimentary tentacle bulbs. The sexual color difference is seen in the young- 

 est medusae we have observed. The hydroid stock is unknown. 



Stomotoca rugosa, nov. sp. 



Fig. 5, Plate 3. 



Stomotoca apicata, Fewkes, J. W., 1881, Bull. Mas. Comp. Zool., Vol. VIIL p. 152 



PI. II. Figs. 1, 4, 9. 

 Amphinema apicatum, Brooks, W. K., 1883, Studies Biol. Lab. Johns Hopkins 



Univ., Vol. II. p. 473. 



The bell is 5 mm. high and 3 mm. broad ; it bears an apical projection 

 which in some specimens is long and slender, and in others is short and blunt. 

 The substance of this projection is solid throughout. There are 2 long, well- 

 developed tentacles and 14 small rudimentary ones. The basal bulbs of the 

 long tentacles are large and hollow. When fully stretched, the long tentacles 

 attain a length of 4-6 times the bell height. The velum is well developed. 

 There are four broad radial tubes, and a broad circular vessel with iaeaed 

 outlines. The proboscis is flask-shaped, the lips being flanged and quite 

 prominent. The sexual products are found in the ectoderm of the upper 

 portion of the proboscis where the outer surface is folded into a complex 

 series of ridges. The bell is transparent, and the entoderm of the tentacle 

 bulbs and of the proboscis is brick-red. In some individuals the 4 radial 

 tubes and the circular vessel are faint red. 



There is a well-marked southern variety of this species, found at the Tortu- 

 gas, Florida, in which the proboscis and the tentacle bulbs are brick-red 

 streaked with black. In some individuals, indeed, the proboscis and ten- 

 tacle bulbs are coal-black. 



Brooks, 1883, has described the hydroid and j'oung medusa of this species 

 from Beaufort, North Carolina. According to him, the hydroid stock is a 

 Perigonimus very much like P. minutus, Allman, 1871, p. 324, Plate XL 

 Figures 4-6. 



This medusa is common at Newport, Rhode Island, and is also found at 

 Charleston, South Carolina. It is rare at the Tortugas, Florida. 



