156 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



Comparison with other genera. — Gentilia is most similar to Archia- 

 cia, for in both genera ambulacrum III is absent or slightly developed, 

 the periproct is inframarginal, the test well inflated, the petals broad, 

 the peristome longitudinal, and the phyllodes have two series of pores 

 in each half-ambulacrum. Gentilia differs in having single pores in 

 its ambulacral plates beyond the petals and in the phyllodes, whereas 

 in Archiacia they are double pored, and in Gentilia the apical system 

 is less anterior. 



Remarks. — I was unable to find any specimens of the type species 

 in Paris but did study a specimen from the Lambert Collection la- 

 beled ? Gentilia globosa Lambert. I have not been able to find any 

 description of this species in the literature, and it is so similar to the 

 type species, Gentilia tafileltensis, that it may be conspecific. I in- 

 clude photographs (pi. 23, figs. 3, 4) of this specimen and a draw- 

 ing of one its phyllodes (text fig. 128). In the collections at the 

 Museum National d'Histoire Naturelle in Paris I found several 

 specimens labeled Pyguropsis noetlingi which belong to a new species 

 of Gentilia, described below. 



In the specimen labeled ? Gentilia globosus and here provisionally 

 referred to G. tafileltensis there are no buccal pores. This is the only 

 specimen I have ever seen of a cassiduloid that had single-pored 

 phyllodes but no buccal pores. This specimen is Cenomanian, and 

 that is the time when the buccal pores and single-pored phyllodes first 

 appeared. In the new species of Gentilia, G. syriensis, there are 

 buccal pores but they are very minute. Again this species is 

 Cenomanian. 



Range and distribution. — Cretaceous (Cenomanian) of Egypt, 

 Syria, and Morocco. 



DESCRIPTION OF NEW SPECIES 



GENTILIA SYRIENSIS Kier, new species 

 Plate 22, figures S-ii ; text figures 129-131 



Material. — Eight specimens studied in the Museum National 

 d'Histoire Naturelle in Paris. 



Shape. — Medium size, holotype 33 mm. long, broad with greatest 

 width posterior to center, rounded anterior margin, slightly pointed 

 posterior ; steep sides, flat adoral surface. 



Apical system. — Anterior, tetrabasal, four genital pores. 



Ambulacra. — Petals very broad, closing distally, with very broad 

 interporiferous zones, narrow poriferous zones with strongly con- 



