MUSEUM OF COMPARATIVE ZOOLOGY. 87 



These invariably have oiLjht otocysts instead of four, even before the ovaries 

 were developeil, ami while there are Ijut two tentacles which are opposite 

 each other. 



In connection with Oceaniopsis it may bi; well to mention a new species of 

 Euchcilota, a young stage (Fig. 13) of which was taken in surface collecting 

 at Newport last summer. This jelly-fish resembles closely the young of E. ven- 

 tricularis McCr., but, unlike it, has only four otocysts. There ai'e two ten- 

 tacles, which arise diametrically opposite each other on the Ixdl margin, at the 

 junction of radial and circular chymiferous tubes. Near the base of each ten- 

 tacular bulb there hang two short tilanients. as in Enclicilotit,. 



The otocysts are situated on the l>ell rim, half-way between the ])eripheral end 

 of the radial tubes. Near each (itocyst there hangs a short iilament, not unlike 

 those situated near the tt'utacular buHjs. 



The single specimen taken was undoubtedly larval, and no indication of the 

 sexual organs was seen. If the number of otocysts does not increase as the larva 

 grows older, this ^ledusa is probably the young of a new genus ; otherwise, it 

 may be the immature form of some well-known Medusa like Eucheilola. Pro- 

 visionally, therefore, I have referred it to Eucheilota, and designate it as the 

 young ol E. quudmiis sp. nov. 



Cladonema sp. 



The genus Cladonema has up to the present time never been taken from 

 American waters. A species of this genus, found by Dr. C. 0. Whitman near 

 Key West City, in 1883, is in certain particulars different from the G. radia- 

 iu/ni Du Jardin, and may be found, on a more extended study, to be a new 

 species. 



Cladonema was hjund with Cassiopea on the shoals near Fleming's Key.* 

 At the time of capture it was apparently at or very near the sea bottom, and 

 was brought up in a dij)-net with sand from the shoal. 



The bell is almost spherical, and is destitute of an apical projection. The 

 outer surface is smooth, and the bell walls thin. No indication could be 

 seen, either in sketches of the animal when alive or in the preserved specimen, 

 of a cavity at the base of the prob(«cis called a " brood sac " in the related 

 genus Drndrnnem.a. 



There are nine chymiferous tubes in the bell walls. Of these tubes, six only 

 originate from the base of the proboscis. Three chymiferous tubes pass directly 

 without sudivision from the proboscis to the bell margin, and three bifurcate 

 a short distance from their origin. The three bifurcating tubes alternate with 

 those which do nut divide. 



There are nine large tentacles hanging from the Ijell margin, each at an ex- 

 tremity of a chymiferous vessel. At the Ijase of each there is an " eye-spot" of 

 black color. Two kinds of lateral branches arise from the tentacles. The first 



* A mangrove key, a short distance nortli of Key West, Florida. 



