98 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, I44 



Genus HEMICARA SchlUter 



Ilemicara Schliitcr, 1902. Zeitschr. Deutsch. Geol. Ges., vol. 54, p. 332. Type 

 species by monotypj^, Hemicara potncranum Schluter. 



GENERIC DESCRIPTION 



Medium size, highly inflated, flat adoral surface ; apical system 

 tetrabasal, four genital pores ; petals very slightly developed, nar- 

 row ; all ambulacral plates double pored ; periproct inf ramarginal, 

 transverse; peristome pentagonal, width equal to height; bourrelets 

 strongly developed, inflated; phyllodes widened, double pored; no 

 buccal pores ; narrow naked median zone in interambulacrum 5 

 adorally. 



Comparison with other genera. — Hemicara is easily distinguished 

 from all the other genera of the Nucleolitidae and may not belong 

 to this family. It resembles some species of C atopy gus by its floscelle 

 and slightly developed petals but can be distinguished easily by its 

 broader test and inframarginal periproct. 



Range and distribution. — Upper Cretaceous (Senonian) of Poland 

 and Germany; only one species known. 



DESCRIPTION OF TYPE SPECIES 



HEMICARA POMERANUM Schliiter 

 Plate 22, figures 1-3 



Hemicara pomeranum Schluter, 1902. Zeitschr. Deutsch. Geol. Ges., vol. 54, 

 p. 332, pi. II, figs. 5-10. 



Material. — Professor Kongiel sent me photographs of a well- 

 preserved specimen in his collection. 



Shape. — Medium size, elongate, broad, with rounded anterior mar- 

 gin, slightly pointed posterior, highly inflated with steep side, adoral 

 surface flat, peristome flush. 



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



Ambulacra. — Petals slightly developed, narrow, open, extending 

 almost to margin. 



Periproct. — Inframarginal, transverse. 



Peristome. — Anterior, pentagonal, width equal to height. 



Floscelle. — Bourrelets well developed, swollen ; phyllodes widened, 

 double pored, with two series of pore pairs in each half-ambulacrum ; 

 no buccal pores. 



Tuberculaiion. — Naked zone in medial zone in interambulacrum 

 5 adorally. 



