0I5ELIA STRIATA. 9 



Campanularia ( ? ) obliqua, sp. nov. 

 Plate 5, Figs. l-j h 



Trophosome: — Hydrothecae with a full outline tapering but little toward 

 the base, with a diaphragm on which rests the body of the hydranth ; the 

 margin has ten prominent teech which do not point directly upward, but 

 obliquely ; the peduncles are annulated at the base and immediately below 

 the hydrotheca, and in one of the specimens there are a few annulations 

 about the middle of the peduncle. The hydrorhiza consists of simple creep- 

 ing tubes. 



Gonosome : — Not known. 



Habitat : — On a sertularian from Perico Island. 



This is a small creeping form with peduncles from 1 mm. to H mm. in 

 height. In the annulation of the peduncles, the shape and number of teeth, 

 this species is like C. gravieri Billard. 1 It is distinguishable from the latter 

 by the obliqueness of the teeth in obliqua and the crests of the teeth in 

 gravieri. 



This species is represented in the collection by a few specimens only, and 

 the main reason for recognizing them as a species, aside from the marked 

 peculiarity of the obliqueness of the teeth, is the hope that by calling atten- 

 tion to them they may be watched for in any future collections from the 

 region of Perico Island. 



"O' 



Obelia striata, sp. nov. 



Plates 6 and 7. 



Trophosome: — Hydrocaidus rising from a creeping stolon, simple, clus- 

 tered, eight to ten annulations at the base, seldom and very sparingly 

 branched, annulated with numerous (12 to 16) rings immediately above the 

 origin of each hydrotheca ; five to eight annulations at the base of each 

 hydrotheca. Hydrothecae pedunculate, alternately arranged, deeply cam- 

 panulate, very hyaline, tapering to the base ; a well-marked diaphragm 

 defines a basal cavity ; the margin has a crenated edge forming about four- 

 teen to sixteen teeth which have well-developed crests projecting inward ; 

 the distal part is deeply fluted, producing a series of longitudinal striations 

 that are about one third the length of the hydrothecae. 



1 Bulletin Museum d'histoire uaturelle, 1004, n° 7, p. 480. 



