DESCRIPTIONS OF SPECIES. Il3 



Steriphonotrochus pulcher sp. nov. 

 PI. IX, figs. 5 to 5d. 



Form subcomute, slightly curved, transverse outline elliptical. Attach- 

 ment area not very large. Corallum wall not very thick, a verv little 

 epitheca doubtfully present. Costse corresponding to all cycles of septa. 

 They are (on upper part of corallum) ,54 in number, are prominent, standing 

 up like plates; some are 1.5 mm. high, alternating in size. When viewed 

 in profile, the margins of the costse are seen to be wavy and ornamented 

 with granules. The sides are covered with granules. Near the area of 

 attachment the costse become much less prominent, and the number is 

 reduced to 24, alternating in size. These 24 septa are continued to the mar- 

 gin of the scar of the attachment area. 



Septa weak, 54 in number; there are four complete cycles and a few 

 septa of the fifth. Twenty-seven septa reach the columella. The other 27 

 fuse by pairs to the sides of the included septum of the next lower cycle. 

 The upper margins of the septa are broken off in the type, and it can not 

 be stated whether they are very exsert. The inner margins are crenately 

 dentate. The sides beset with mamillate granules. Columella vesicular. 

 Calicular fossa deep, 6 mm. Greater diameter of calice, about 17 mm.; 

 lesser diameter of calice, about 13 mm.; height, 28 mm. 



Locality. — Red Bluff, Wayne County, Mississippi. (Schu chert and Burns, 



; 



Geologic occurrence. Red Bluff bcds. 



Type. — United States National Museum. 



collectors ""■ 



Genus PAEASMILIA Milne-Edwards and Haime. 

 Parasmilia ludoviciana sp. nov. 

 PI. IX, figs. 6 to 13. 

 1896. Parasmilia n. sp. Vaugbati. Bull. U. S. Geol. Survey 2^o. 142, p. 51. 



Form cornute, elongate, curved, cross section approximately circular 

 or slightly compressed. Wall a pseudotheca. Costse corresponding to all 

 cycles of septa; moderately prominent, subequal in size. Septa very 

 slightly exsert, rather thin, about 32 in number; 16 reach the columella 

 The aiTangement is in six systems, tlu-ee complete cycles, 8 septa of the 

 fourth cycle. 



MOK xxxix 8 



