NO. 1706. CCELENTERATES FROM LABRADOR, ETG.—BIGELOW. 307 



In most of the specimens the oral appendages are in the condition 

 shown in the photograph (pi. 31, fig. 5), there being foursessile nemato- 

 cyst knobs at each corner of the mouth. EarHer stages, such as are 

 figured by A. Agassiz ('65, fig. 257) are to be seen in smaller spec- 

 imens. In the adult condition, according to A. Agassiz, there are seven 

 nematocyst organs in each cluster and the same condition is recorded 

 by Browne ('96). This type of oral appendage, as has been pointed 

 out by ^laas (:05) is entirely different from the branched oral ten- 

 tacles of Ratlikea, and forms sufficient grounds for separating the 

 two genera. 



The numbers recorded by A. Agassiz and b}^ Browne for the groups 

 of tentacles, five for each radial, three for each interradial group, 

 appear to be the final ones. At least, I have never seen them sur- 

 passed. 



In the earliest stage in the development of tentacles which I have 

 observed, the bud being still attached to the manubrium of the parent, 

 there is one tentacle in each group, radial or interradial, the radials 

 being much the largest. 



Young medusae, at hberation, have three tentacles in each radial 

 group, the central one being much the largest, and one in each inter- 

 radial group. The adult number of tentacles is usually attained, as 

 described by A. Agassiz ('65), by the development of an additional 

 pair of lateral tentacles in each group, radial or interradial, but the 

 formation of additional tentacles is rather irregular, as Browne has 

 observed. 



Color. — In the preserved specimens the manubrium in the budding 

 phase is very pale reddish, in the sexual phase its entoderm is of a 

 much deeper reddish brown tint. In both phases the tentacular 

 bulbs are of a deep chocolate brown. These structures are recorded 

 by Hargitt (:05) as being ''pinkish, tending to brown, and even 

 blackish in rare cases." 



Tlus species was previously known to occur commonly in Massa- 

 chusetts Ba}^ and south of Cape Cod in the Woods Hole region and 

 at Newport, Rhode Island. It is not known from south of Long 

 Island Sound. In European waters it is known from Norway south 

 to the coast of France. 



LEPTOMEDUS^^. 

 STAUROPHORA LACINIATA L. Agassiz. 



Staurophora laciniata L. Agassiz, '49, p. 308, pi. 7. 



One specimen, 70 mm. in diameter; Fogo Island, Newfoundland, 

 July 28; surface. 



The single specimen, which has well-developed gonads, is of only 

 medium size, since this species frequently attains a diameter of 

 150 mm. 



