NORTH AMERICAN EARLY TERTIARY BRYOZOA. 823 



Genus CONOCAVA Calvet, 1911. 



1911. (-'on ucura CALVET, Diagnoses de quelques especes iiouvelles de Bryozaires C.vclostiniics 

 provenant des Carupagnes scientifiques accomplies par S.A.S. le Prince de Monaco 

 a bord de la Pnnccsse Alice, Bulletin Institut oceanographia Monaco, No. 215, p. 8. 



Zoarium conical, fixed to the substratum by its enlarged summit and increasing 

 in size at the base. Lateral surface occupied in part by salient series of tubular 



B -J 



FIG. 271. Genus Trochiliopora Greg- 

 ory, 1909. 



Side and top views, X 3, of the type 

 of the genus Trochiliopora hmnei 

 Gregory, 1909, from the Chalk of 

 England. 



FIG. 272. Genus Conocava Cal- 

 vet, 1911. 



Zoarium of Conocava rich- 

 ardi Calvet, 1911, X 22. 



zooecia. arranged side by side, and according to as many generatrices of the colonial 

 cone as there are series, these being separated from each other by depressions where 

 the intermediate pores are found. (Calvet.) 



Genotype. Conocava richardi Calvet, 1911. 



Range. Recent. 



LEIOSOECIIDAE, new family. 



The ovicell is a large, orbicular, smooth, salient swelling, elevated above a 

 shallow excavation and obstructing a certain number of tubes. 



This family offers the greatest analogy with that of the Plagioeciidae with 

 which it will be necessary to join it if we find intermediate forms. It has only 

 appeared to differ from it in a greater constancy of the orbicular form of the 

 ovicell and in the presence of mesopores. The ovicell of the Ceidae is also very 

 close, as is that of Entalophora ramossissima D'Orbigny, 1851. 



LEIOSOECIA, new genus. 



Greek : Icois. smooth, in allusion to the aspect of the ovicell. 

 The tubes are cylindrical. The mesopores are parietal and regular. 

 Gcnuti/i>c. Leiosoecia (Multicrescis) -parvicella Gabb and Horn, 

 Maastrichten. 



1860, 



