FOSSIL ECHINI OF THE WEST INDIES. 



Clypeaster parrse Desmoulins. 



Erizos petrificados Antonio Parra, 1787, Descripcion de diferentes piezas de Hist. Nat. del 



ramo maritimo, Havana [Cuba], p. 181, plate 65, fig. 2. 

 Clypeaster parrce Desmoulins, 1835-37, Etud. sur les Echin., pp. 218 to 219. Michelin, 1861, 



Monog. des Clyp. fossiles, Mem. de la Soc. Geol. de France, vol. 7, p. 112, plate 



14, figs. 2a to e. Cotteau, 1897, Bol. Com. Mapa Geol. Espana, vol. 22, p. 31, 



plate 11, figs. 1 to 5. 



This species, of which I have not seen material, is well marked by 

 the excentric position posteriorly of the apical system and the exces- 

 sively large petals. Cotteau says that neither the mouth nor peri- 

 proct was preserved in the specimen from which Michelin described 

 the species. The mouth (in a posterior position) and periproct are 

 indicated in Cotteau's cross-section, plate 11, figure 2, but in view of 

 his statement, this figure must be considered schematic. 



According to Michelin, this species is found in the Tertiary and 

 littoral formations of the islands of Cuba and Guadeloupe, Michelin 

 collection. 



Clypeaster lanceolatus Cotteau. 

 (Plate 4, Figure 2.) 



Clypeaster lanceolatus Cotteau, 1897, Bol. Com. Mapa Geol. Espana, vol. 22, p. 39, plate 9, 

 figs. 1 to 3. Lambert, 1915, Mem. Soc. d'Agric. de 1'Aube (Troyes), vol. 79, p. 24. 

 Jackson, 1917, Proc. U. S. Nat. Mus., vol. 53, p. 490, plate 62, figs. 1, 2; 1919, Bull. 

 103, U. S. Nat. Mus., p. 104, plate 46, figs. 1 to 2. 



The following is an extract from the original description of this species : 



Test oval, upper face moderately elevated, lower face concave; the 5 

 ambulacral furrows are well marked from the peristome to the border. 

 Ambulacral areas are petaloid, slightly elevated, lanceolate, almost closed 

 at the tips. Poriferous areas are narrow, depressed, terminating in a closed 

 point, each of the plates bearing 5 or 6 tubercles. Peristome subpentagonal. 

 Periproct circular, distinctly near the border of the test. Vertex central. 

 Apical disk not visible, as the test is worn away at that point. 



The specimen in the American Museum measures about 25 mm. in 

 height; the length is doubtful, as it is broken away posteriorly, but it 

 would, as estimated, measure about 120 mm. in length and 98 mm. in 

 width. Cotteau gives as the measurements of his type specimen, 

 height, 21.5 mm.; length, 86 mm.; width, 65 mm. (?). The width in 

 his measurements is queried, as the specimen is incomplete on one side. 

 The New York Museum specimen is therefore distinctly larger than 

 the type, but seems to be clearly referable to this species. Clypeaster 

 lanceolatus is near to C. antillarum, but it has a relatively smaller 

 petaloid area, more elevated petals, and is more deeply concave ven- 

 trally than is antillarum. 



This species is credited to Azpeita by Cotteau, but it is a purely 

 manuscript name with Azpeita and should be credited to Cotteau, who 

 first published it. 



Oligocene, Havana, Cuba, not far from the university buildings; 1 

 specimen, collected by Barnum Brown, American Museum Natural 



