58 PROCEEDINGS OF THE NATIONAL MUSEUM vol.76 



It is possible that the recent species is different from the fossil 

 one, but in the present state of knowledge it is impossible to estimate 

 the importance of the separation of the fascicles on colonies. The 

 discovery of the ovicells would give perhaps a better character of 

 differentiation. 



Our specimens are attached to corals, to nullipores, and to Celle- 

 pores. Their color is violet. They are formed of superposed sub- 

 colonies, forming short bifurcated branches. The superior subcolony 

 only remained alive ; it is bordered by a Avide, smooth basal lamella, 

 free or covering the inferior subcolony. The tubes are formed of two 

 or three rows of polygonal tubes ; they are little salient and arranged 

 laterally. The cancelli(?) are numerous, with a diameter almost 

 equal to that of the tubes; they occupy all the superior part of the 

 colony and the space between the fascicles. On the dead slightly 

 worn specimens the fascicles are more visible and they then resemble 

 Cerioporas. 



As the ovicell is not known, it is useless to attempt the proper 

 classification of this species, and it is preferable to leave it under the 

 primitive name. The rare simple colonies have the aspect of Lich- 

 enopora and the composite colonies have that of Tholopora or 

 Do7nopora. 



The synonymy given by Miss Jelly (p. 86) for Dmiwpora stellata 

 is absolutely false. This author has confused the present species with 

 Coronopora truncata Fleming, 1828, which is a boreal species of the 

 Tubuliporidae and with another species of Jameson. 



Occun^ence. — Galapagos Islands, D. 2815. 



Plesi&types.—C^i. No. 8532, U.S.N.M. 



CAVARIA PRAESENS, new species 



Plate 9, Figures 7-9 



Description. — The zoarium incrusts Cellepores and shells ; it is sur- 

 rounded by a wide smooth, basal lamella, and emits short, cylindrical 

 fragments terminated by irregular pores and divided into two parts 

 by a very little salient diametrical lamella (basal lamella). The 

 tubes (invisible exteriorily) are in section, cylindrical, with dorsal 

 gemmation on the basal lamella covered at the extremity of their 

 length with moniliform walls. The peristome is thin, little salient. 

 The tubes are separated by irregular ramified mesopores, closed ex- 

 teriorily by a diaphragm more or less apparent. 



Measurements. — Diameter of orifice, 0.14 mm. ; diameter of peri- 

 stome, 0.18 mm. 



Struoture. — In spite of its complex appearance, the structure of 

 this species is very simple ; it is a Berenicea^ in which the peristomies 

 of the tubes are separated by mesopores. This Berenicea emits 



