100 Dr. T. R. Wright on a new Germs of Fossil Cidarid?e. 

 Foreign Species of the genus Hemipedina. 



.^J5C^A yHemipedina seriale, Wright. 



Diadema seriate, A.gassiz ; Leymerie, Mem. de la Societe Geologique 

 de France, tome ii. p. 330. pi. 24. fig. 1, 1839 ; Agassiz and 

 Desor's Cat. raisonne des Echinides, 3 s^r. tome vi. p. 348. 



Test hemispherical^ subglobose above, flat below; ambulacra! 

 areas with two rows of tubercles nearly as large as those of 

 the interambulacra ; interambulacral areas with six rows of 

 tubercles abreast at the equator, diminishing to four and two 

 rows above ; a few secondary tubercles unequally distributed ; 

 mouth-opening small; peristome slightly decagonal. 



Locality, — Inferior Lias, France. 

 Coll. M. Michelin. 



Hemipedina TVoodwardii, Wright. 



This species occurs in the Cornbrash of the Marquise, near 

 Boulogne-sur-Mer. In one of the specimens before us the spines 

 are preserved ; the primary spines are not very long, scarcely the 

 length of the diameter of the test; the secondary spines are 

 short and needle-shaped; the surface of both kinds is covered 

 with fine longitudinal lines. 



Locality. — The Cornbrash near Boulogne-sur-Mer. 



Coll. British Museum. 



Hemipedina NattheimensCj Wright. 



Echinopsis Nattheimensey Quenstedt, Handbuch der Petrefacten- 

 kunde, p. 582. pi. 49. fig. 37. 



Locality. — ^White Jura, Nattheim. 



ColL British Museum. At this moment the specimen is not 

 at our disposal. We shall give a diagnosis of this species in our 

 Monograph. 



Hemipedina Scemanni, Wright, nov. sp. 



Test small, hemispherical ; ambulacra with two rows of tubercles ; 

 interambulacral areas with one row of primary and two rows 

 of secondary tubercles, the primary tubercles alternating with 

 the secondary tubercles, not placed abreast as in most of the 

 species ; tubercles of both areas nearly the same size. 



Locality. — Coral Rag, Commercy, Meuse. 



ColL Dr. Wright : sent by M. Louis Soemann of Paris. 



