Ofi n /•;•:.' Calif oruian Mcduscc. 
595 
found in the waters of the Atlantic is a strange genus called 
Dipurena. This jelly-fish is remark- 
able from the fact that while its bell 
resembles closely that of Sarsia, the 
Medusa of Syncoryne, the form of the 
tentacles is very different. While 
Sarsia has loni;, hi^irhly.flexible tenta- 
cKs, Dipurena has, in the same posi- 
tion, arran<;cd at regular intervals on 
tin- Ix-ll, nine stiff club-shaped append- 
UL^os. enlarged at their tips into clavate 
(M^ans of unknown function. ' The 
form of the bell, the structure of the 
Tv : ---V i»> ; - » j V tentacles and the proboscis of Dipure- 
§\J ^ na have been figured in my paper on 
. the '• Jelly-fishes of Narragansett Bay," 
] to which the reader is referred for a 
^ knowledge of the peculiarities of this 
" ''' ' '"' ^''" ^""^ most interesting animal. The points 
with whirl, we li.e.e at present to deal are the following: 
iJipurena lias a ht inisplu-i ical ht'll, four simple radial chymifer- 
ous tubes, aiui four stitV tentacles which are enlarged at their 
extremities into cl(il)-shape.l bodices resembling small dumb-bells. 
The length of the proboscis is very much longer than the height 
of the bell cavity, and through its walls the ova can sometimes 
be seen in packets occupying two regions. The mouth is simple, 
resembling that of Sarsia, and at the base of the stiff tentacles 
on the bell margin there are simple pigment spots or ocelli. 
Dipurena is rare on the coast of New England, but it seems to 
be more common in the Gulf Stream, and occurs in numbers in 
Floridan waters and on the Carolina coast. 
Under the lofty cliffs of the island of Santa Cruz, opposite 
Santa Barbara, a Medusa with certain of the characters of 
Dipurena was taken in the Spring of 1887. There are features 
of this Medusa which stamp it as a most characteristic one, and 
' It seems highly improbable that the function of these clavate appendages is the 
