94 FOSSIL ECHINI OF THE WEST INDIES. 



Eupatagus abruptus (Gregory). 



Archizopneustes abruptus Gregory, 1892, Quart. Jour. Geol. Soc. London, vol. 48, p. 163, 



plate 4, figs. 1 to 5. 

 Asterostoma, sp. nov. Gregory, 1892, Bull. Geol. Soc. Amer., vol. 3, p. 107 [errata p. xii says, 



for Asterostoma, n. sp. read Archceopreuster abruptus Greg.j. 



This species belongs to Eupatagus rather than Archceopneustes because 

 of its close relationship to Eupatagus cubensis (Cotteau). It has no near 

 relationship to Palaopneustes hystrix A. Agassiz, which Recent species 

 Gregory made the type of his genus Archaopneustes. Gregory does not 

 give a geological age to this species in his description, but in a later paper 

 (1895, Quart. Jour. Geol. Soc., vol. 51, pp. 255to312) says that the Oceanic 

 series is younger than the Scotland beds. R. J . L. Guppy * reports finding 

 Echinolampas anguilla in the bed whence this species came. The age of 

 the deposit, the Bissex Hill formation, would therefore be Oligocene, either 

 the Antiguan or the Anguillan horizon. For a new Eupatagus from 

 Barbados, recently received by the U. S. National Museum, see p. 3. 



Oligocene, uppermost limestone of the Oceanic series, Bissex Hill "beds," 

 Barbados, G. Firth Franks collector; type, British Museum, No. E 3433. 



Eupatagus cubensis (Cotteau). 



Macropneustes cubensis (Cotteau), 1875, Kongl. Sven. Vet. Akad. Handl., vol. 13, No. 6, p. 6; 

 1881, Ann. Soc. Geol. Belgique, vol. 9, p. 48, plate 4, fig. 7; 1897, Bol. Com. Mapa 

 Geol. Espafta, vol. 22, p. 91, plate 23, figs. 1 to 4; plate 25, fig. 7. 



I have not seen specimens of this species. It belongs in the genus 

 Eupatagus rather than Macropneustes, because the ambulacral petals are 

 flush, not sunken. Cotteau describes the species from the Eocene of 

 St. Martin, Province of Matanzas, Cuba, Cotteau collection, Paris; also 

 ingenio Constancia, in the Province of Santa Clara, Cuba, collection 

 Comisi6n del Mapa Geol6gico de Espafia, Madrid. 



Eupatagus elegans, new species. 

 (Plate 16, Figure 8; Plate 17, Figure 1.) 



The following is a description of this species : 



Species of large size, ovate in outline, broadly rounded anteriorly, nar- 

 rower and almost coming to a point posteriorly. Upper face subconical, 

 the apex coinciding with the apical disk, which is excentric anteriorly. 

 From the apex the test slopes quite steeply anteriorly and more gradually 

 posteriorly and laterally to the ambitus. It is rounded quite sharply at 

 the ambitus. The ventral side is depressed about the peristome and rises 

 in a prominent elevation in the plastron, especially posteriorly. This 

 swelling, while marked, is not as excessive as it is in the next species, E. 

 vaughani. There is a slight depression anteriorly in which the ambulacrum 

 III lies, which could hardly be called a furrow. The paired ambulacra 

 all lie in radial slight depressions of the test. The anterior ambulacrum 

 III is straight, narrow, with small pores situated in the lower half of the 

 plates. The paired ambulacra are rather narrow for the size of the specimen 

 (13 mm. at the widest part), petaloid, widening markedly below the petals, 

 widest at the ambitus, thence narrowing to the peristomal border. Ambu- 

 lacra II and IV, the anterior pair, are widely divergent, almost at right 



1 Guppy, R. J. L., Quart. Jour. Geol. Soc. London, vol. 67, p. 692, 1911. 



