I.KI'TOMKIM s i; I.AOIiHT \. 



203 



purple ocellus situated within the ectoderm of the inner (centripetal) side of" most of the ten- 

 tacle-bulhs. There are a number of coiled cirri scattered between the tentacle-bulbs (plate 

 22, fig. 5). These are usually somewhat less numerous than the tentacles. They arise at a 

 short distance above the bell-margin on the exumbrella suit- of the bell. The con- of each 

 cirrus is made up ot highly vacuolated entoderm-cells which are continuous with the entoderm 

 of the circular canal. 



Numbers of spindle-shaped nematocyst-capsules are found in the ectoderm at the distal 

 end of each cirrus. In addition to the cirri there are one or two clubs, or cordyli, between each 

 successive pair of tentacles. The distribution of these cordvli is \ery irregular, but they are 

 usually somewhat more numerous than the tentacles. Kach club is flask-shaped and united 

 to the bell-margin by means of a narrow neck. They arise from the side of the exumbrella at 

 the level of the upper nerve-ring, a very short distance above the level of the velum. The core 

 ot each sense-club is composed ot large, highly vacuolated, entodermal cells which are directlv 

 continuous with the entoderm of the circular-canal (see Brooks. lS<;5. plate 17, fig. 5!. The 



Fin. 105. Ltloilicen rrntitita (ulolhrix *, .ifti-r Bnxik-. in ["iini.il i>f Mi.rpholni;\ , Vnl. 10. 

 A . Srain nl trnt.ulr. />. Sriinm nf tini- of tin- marginal (.luh-.. 



clubs are not solid tor there is usually a small intercellular lumen in the axis ot the broad distal 

 end of the club. There are no concretions. The velum iswell developed. Thereare4straighr, 

 narrow radial-canals. The stomach is short and quadrangular in cross-section, and there 

 are 4 recurved, slightly crinkled lips. In fully grown individuals the gonadj. extend from the 

 sides ot the stomach down nearly, it not quite, the entire length of the radial-canals. The 

 medusa is very variable in color, some individuals being nearly colorless. In otheis the 

 entoderm ot the manubnum, gonads. and tentacle-bulbs is green or pink, and the entoder- 

 mal lamella ot the bell is ot a delicate green, while in otheis the entoderm is milky or dull 

 translucent yellow. 



This medusa is common along the coast of the United States from June to early winter. 

 along the southern shores of New F.ngland to Cuba and the West Indies, but it has not been 

 taken north of Massachusetts Bay. It ranges into more northerly latitudes off the European 

 coast, however, tor Browne took it in Valencia Harbor on the southern coast of Ireland. It 

 is seen in the Mediterranean from October to December, and is found in the Fiji Islands, 



