﻿222 The Philippine Journal of Science \m 



Genus LOBONEMOIDES novum 



Generic characters. — LobonemaAike Rhizostomata triptera in 

 which the marginal lappets are pointed but not greatly extended. 

 The mouth-arm membranes are not perforated by windowlike 

 openings. There are more than 8 rhopalia, twice as many radial 

 canals as sense organs all extending to the margin, and a ring 

 canal. The ring canal gives off externally a network of anas- 

 tomosing canals, extending to the margin, and internally a series 

 of anastomosing canals on each side of each rhopalar canal, which 

 do not reach the stomach and are connected with the rhopalar 

 canals but not the interrhopalar canals. The exumbrellar 

 sensory pits are furrowed with radiating dendritic grooves. 

 Each mouth arm bears numerous small scattered appendages and 

 one large terminal spindle-shaped appendage, all of which taper 

 to filamentous outer ends. 



The type species is L. gracilis sp. nov. from Taytay, Palawan. 



Fig. 10. Lobonemoides gracilis, an exumbrellar view of half the bell, showing the canal system, 

 the marginal lappets, etc. X 1. 



Lobonemoides gracilis sp. nov. (figs. 10, 11, 12, and 13). 



Type. — No. C. 2422, zoological collection, University of the 

 Philippines. 



The bell is flat, 50 to 85 mm. in diameter, and very trans- 

 parent. The stomach and canals are semiopaque white and the 

 gonads opaque white. That part of the bell which lies outside 

 the ring canal is very thin and flexible, while the central portion 

 is rather thick and stiff. This outer thin region is about 17 

 mm. wide in the type specimen. The bell is 7 mm. thick out- 

 side the ring canal, 14 mm. high through the outer edge of 

 the arm disk, and 10 mm. high through the center of the arm 

 disk. There are a few scattered papilhe on the exumbrella, 



