138 MONOGRAPH OF THE FOSSIL POLYZOA OF THE 



furrows as in the preceding species but are almost level with the rest of the surface, 

 which is, at most, merely undulated. 



Locality, with the preceding. 



The ornamentation of the mouth and the very plain surface distinguish this species. 

 It appears to be rare. We have observed but a single specimen, which, however, is 

 well characterized. There is one ovarian vesicle on the specimen. It is nearly as 

 long as an ordinary cellule, very convex, strongly carinate in the middle, longitudinally 

 and with the surface plain. 



PHIDOLOPORIDiE, {New Family,) G. and H. 



A certain number of the cellules only provided with special pores. Opening of 

 moderate size and not closed by a membrane in the living state. 



This family is related both to the Esdiaridce and the EscJiarinellidce and Porinidce. 

 We believe that its true position should be immediately after the Esdiaridce. Three 

 genera, belonging to this family, are already known. Two of them are here described 

 for the first time. The third, Selenaria of Busk, (Catalogue of British Museum, Polyzoa, 

 part 2.) is characterized by having vibracular pores placed at intervals over the colony, 

 which is discoidal as in Lunulites. The pores in this genus are attached to cellules, 

 differing from the others by having no oval opening, and in being ornamented differ- 

 ently from the ordinary cellules. The only species yet known is recent, S. maculata, 

 Busk, loc. cit. {Lunulites id., Busk, Voyage of the Rattlesnake.) 



PHIDOLOPORA, {N ft,) G. and H. 



Colony as in Eetepora, composed of free, anastomosing branches, with the cellules 

 only on one face. Cellules provided with a "special pore" or vibracular (?) opening 

 on the surface of the cellule, behind the mouth. This genus resembles Eetepora, but 

 can be distinguished by the scattered special pores over the surface of the colony. 



P. labiata, n. s., fig. 21. — Colony composed of rounded or compressed branches, fre- 

 quently anastomosing. Cellules only on one face; not separated externally, or at 

 most separated only by very faintly depressed lines. Mouth rounded, proximal lip 

 deeply notched. Surface without ornament, gently undulating and usually depressed 

 around the mouth. Special pore, when present, placed on the surface of the cellule, 

 in or near the median line, and some distance behind the mouth ; bordered by a pro- 

 minent lip and opening upwards and forwards. Ovarian vesicles small, nearly hemis- 

 pherical, unornamented and placed directly in advance of the mouth. Back of the 

 colony plain or showing at times very faint undulating lines, exhibiting the divisions 

 of the cellules. 



Locality. — Santa Barbara, Cal. Miocene. Not rare. The special pores have no 



