28 



Trans. Acad. Sci. of St. Louis. 



are of no vakie and have no right to claim priority- The 

 species which Dr. Troost had designated b}^ this name was 

 first described by Dr. Roemer in 1851 * under the name of 

 Pentatrematites granulatus, to which Dr. Roemer remarks 

 that he had retained the specific name found on the label of 

 Troost' s specimen in the Doctor's collection. However, this 

 name does not appear in Troost' s list, but I can state with 

 permission of the Smithsonian Institution, which is now in 

 possession of the Troost collection, that the collection con- 

 tains specimens labeled by Dr. Troost as Granatocrinus gran- 

 ularis, as is to be seen from the following list : — 



Troost's 

 number. 



Granatocrinus granularis (cast) 



G. cidariformis, 2 specimens 



G. granularis, 2 specimens (casts) 



G. globosus, 2 sp., one a cast and one silicifled. . 



G. (nov.) (cast) 10 miles north of HuntS' 



ville, Ala 



G. (cast) Fayetteville, N. C 



1993 

 2839 



2788 

 2788i 



Number of 



Smithsonian 



Institution. 



33087 

 33080 

 33097 

 33077 



33089 



11476 



The last two are like the specimens in the Troost collection, 

 but do not belong to it. 



All these specimens seem to be one and the same species, 

 with the only difference that granularis is a little smaller 

 than cidariformis. Most of them are silicious casts and not 

 in a good state of preservation. With permission of the 

 Smithsonian Institution I will give the Doctor's description, 

 copied from his manuscript together with a figure of both 

 specimens. This description is very deficient as some of the 

 most essential parts have been omitted or misrepresented. 

 The one labeled granularis is a little smaller and deformed 

 but shows the articulation surface of the column, and indica- 

 tions of genital openings, which are ver}'- small for the size of 

 the specimen, but in none of the specimens is the deltoid 

 piece perforated as we find it in G. noriooodi. 



* Wiegmann's Archiv fur Naturgeschichte, 1851, p. 363. 



