24 FOSSIL ECHINI OF THE WEST INDIES. 



by Cotteau, in the collections that I have seen, only two species occurred, 

 namely, Echinometra prisca and one other which is provisionally placed 

 here. 



The specimen here described is so much worn that it is not certain 

 what the species is, yet it shows a good many characters worth record- 

 ing. Test circular, low, rounded, dome-shaped, flattened on the lower 

 side; ambulacral plates narrow, compound; the pores in arcs of 3 

 pairs to each plate ; interambulacra twice the width of the ambulacra 

 at the mid-zone. The surface of the test is so worn that while sutures 

 can be made out, no external characters are retained. Genital and 

 ocular plates are in place, and though indistinct, the genitals appar- 

 ently meet in a ring, shutting out the oculars from the periproct. 

 Height of specimen 13 mm., diameter 29 mm. 



Miocene, Gurabo formation, Rio Gurabo, above Gurabo Adentro, 

 District of Monte Christi, Dominican Republic; T. W. Vaughan and 

 C. W. Cooke collectors, May 1919, 1 specimen, U. S. Geol. Sur. 

 station 8547, U. S. Nat. Mus. No. 328232. Cotteau gives as locality 

 in his original description, Cienfuegos, Cuba, and ascribes this species 

 to the Eocene. 



FamUy HEMIdDARTD^ Wright, 1857. 

 Genus CODIOPSIS Agassiz, 1840. 



Type species. Echinus doma Defrance, 1825, Diet. Sci. Nat., vol. 

 37, p. 101. 



Codiopsis arnaudi Cotteau. 



Codiopsis arnaudi Cotteau, 1862-67, Paleontologie Francaise, vol. 7, p. 786, plate 1192, 

 figs. 12 to!8; 1897, Bol. Com. Mapa Geol. Espafia, vol. 22, p. 14, plate 1, figs. 10 to 15. 



This species was originally described from the Cretaceous of France. 

 I have not seen any West Indian material, but Cotteau ascribes to 

 this species a specimen from the Cretaceous of Santa Lucia, Province 

 of Santa Clara, Cuba. 



Suborder STIRODONTA Jackson, 1912. 



Family SALENHD^B Duncan and Sladen, 1887. 



Genus SALENIA Gray, 1835. 



Type species. Cidarites scutigera Miinster in Goldfuss, 1829, Petre- 

 facta Germanise, vol. 1, p. 121, plate 49, figs. 4a, 46. 



Salenia scutigera (Miinster). 



Cidarites scutigera Miinster, loc. cit. 



Salenia scutigera Cotteau, 1897, Bol. Com. Mapa Geol. Espafia, vol. 22, p. 8, plate 1, figs. 1 to 3. 



To this species, described from the Cretaceous of Europe, Cotteau 

 refers a single specimen from the Cretaceous of Santa Lucia, Province 

 of Santa Clara, Cuba, Coll. Comisi6n del Mapa Geol6gico de Espafia. 



