42 FOSSIL ECHINI OF THE WEST INDIES. 



This species is markedly peculiar in its very widely open petals, the 

 nearly straight line of the inner rows of pores, and the 4 pores situated 

 below the tips of the petals. In the photographic figure these peculiar 

 pores are seen well below the posterior pair of petals I and V. 



Oligocene, from place of Marco Sanchez, at the base of Monte Toro, 

 northwest of Guantanamo, Cuba, C. T. Ramsden's collection. Jamaica, 

 1 specimen, purchased of Ward, Mus. Comp. Zool. No. 3255. Cotteau 

 gives as rare in the "Miocene" of Matanzas, Cuba, collection Comision 

 del Mapa Geologico de Espana. Lambert reports a single badly 

 distorted specimen from Antigua, collected by J. W. Gregory in 1899, 

 collection of British Museum. 



Clypeaster batheri Lambert. 



Clypeaster batheri Lambert, 1915, Mem. Soc. d'Agric. de 1'Aube (Troyes), vol. 79, p. 26, 

 plate [unnumbered], figs. 3 to 7. 



The following is a description of this species: 



Species of medium size, longer than wide, depressed, oval, narrowed 

 anteriorly, subtruncate posteriorly. Upper face moderately convex, ventrally 

 widely and deeply concave. Petals wide open, with a tendency to narrow 

 toward the extremities. The type measures 52 mm. in length, 44 mm. in 

 width, and 15 mm. in height. 



Lambert compares this species with C. cotteaui, from which he 

 distinguishes it by its form more elongate, its petals longer and less 

 open, and pores more widely spaced. It differs also in that cotteaui 

 is high and rounded on the margin, whereas batheri is low on the 

 margin. It differs from C. parvus in that the petals are proportionately 

 very much longer in that species. 



Lambert refers this species to the "Miocene" [Oligocene] of Antigua, 

 collected by J. W. Gregory in 1899, collection of British Museum. 



Clypeaster parvus Michelin. 



Clypeaster parvus Michelin, 1861, Mon. Clyp. Foss., p. 117, plate 19, figs. 2a to f. Cotteau, 

 1897, Bol. Com. Mapa Geol. Espana, vol. 22, p. 41, plate 15, figs. 1 to 3. Lambert, 

 1915, Mem. Soc. d'Agric. de 1'Aube (Troyes), vol. 79, p. 23. 



Cotteau in his synonymy refers this species to Duchassaing 1847, 

 Agassiz 1847, and Desor 1858; but in these several references the name 

 is a nomen nudum, as there is no adequate description. Michelin is 

 clearly the first describer of the species. I have not seen any specimens 

 of this species and it may only represent the young of C. cotteaui or C. 

 planipetalus , but the very truncate petals and poriferous areas indicate 

 that it is distinct. In the Revision of Echini, Mr. Agassiz considers 

 parvus a synonym of rosaceus, presumably thinking it the young of 

 that species, but comparison with young rosaceus (12 to 30 mm.) shows 

 that this is not the case, the petals being perfectly distinctive. 



Cotteau says that it occurs in the white littoral tuff of Guadeloupe, 



