78 FOSSIL ECHINI OF THE WEST INDIES. 



He says it differs in that loveni is less swollen, in the divergence of ambu- 

 lacra II and IV, and in the nearly central apical disk. 



Oligocene, Anguilla formation, island of Anguilla, Guppy collection 

 ex Cleve, 5 specimens, cotypes (the large one is apparently the original 

 of Cotteau's plate 5, fig. 9), U. S. Nat. Mus. No. 115391. Besides the 

 Cleve collection, Cotteau mentions having specimens from the muse- 

 ums of Stockholm and Upsala. Crocus Bay Hill, roadside descent to 

 Crocus Bay from Valley, Anguilla, T. W. Vaughan collector, 2 speci- 

 mens, U. S. Geol. Sur. station 6893. Crocus Bay, southwest side, 

 Anguilla, T. W. Vaughan collector, 1914, 2 specimens, U. S. Geol. Sur. 

 station 6894. Crocus Bay, southwest shore from the lowest 10 to 15 

 feet of fossiliferous marls, Anguilla, T. W. Vaughan collector, 1914, 

 3 specimens, U. S. Geol. Sur. station 6965. Crocus Bay Bluff, south- 

 west side, from the uppermost horizon, 125 feet above sea-level, mostly 

 limestone, Anguilla, T. W. Vaughan collector, 4 poorly preserved 

 specimens, but doubtless referable to the species, U. S. Geol. Sur. 

 station 6967. Specimens which are wanting in structural detail, but 

 fairly referable to this species, Government Road, Aguadilla to Rincon, 

 Porto Rico, "Arecibo" limestone, weathered marl, kilometer post 2, 

 from roadside grottoes where road-metal had been taken out, C. A. 

 Reeds collector, 7 specimens, station 117, Expedition of New York 

 Academy of Sciences, the Porto Rican Government and American 

 Museum of Natural History cooperating. 



Paraster subcylindricus (Cotteau). 

 (Plate 13, Figure 10; Plate 14, Figures 1, 2.) 



Schizaster subcylindricus Cotteau, 1875, Kongl. Sven. Vet. Akad. Handl., vol. 13, No. 6, p. 31, 

 plate 5, figs. 14 to 17. Guppy, 1882, Sci. Assoc. Trinidad, Proc., part 12, p. 197. 



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



Species of small size, oblong, rounded anteriorly, subtruncate posteriorly. 

 The upper face thick, swollen, nearly as high in the anterior region as in 

 the posterior, slightly sloping anteriorly. Posterior face vertically sub- 

 truncate. Lower face rounded on the borders, uniformly bulging, which 

 gives a very remarkable subcylindrical aspect. Apical disk strongly excen- 

 tric posteriorly. Anterior furrow wide, scarcely excavated, apparent only 

 at the approach to the summit ; very attenuate and nearly wanting toward 

 the ambitus. The anterior ambulacrum III is quite different from the 

 others, straight, with small pores, separate and widening in spacing, more 

 as they approach the ambitus. The paired ambulacra are excavated, 

 flexuous, scarcely open at the tips, very unequal; the posterior I and V 

 are shorter than the others, having the poriferous areas distinctly wider 

 than the interval which separates them. The interambulacra toward the 

 apical disk are narrow, compressed, prominent. The peristome is semi- 

 circular, labiate near the anterior border. Periproct rounded, opening 

 at the summit of the posterior face. Peripetalous fascicle less sinuous than 

 in some species. 



Of 4 specimens in Washington, the largest measures 20.5 mm. in 

 height, 30 mm. in length, and 27 mm. in width. This species is dis- 



