90 FOSSIL ECHINI OF THE WEST INDIES. 



Eupatagus species a. 



The following is a description of the specimen : 



Species of large size, rounded, dome-shaped; a little narrower anteriorly 

 than posteriorly. Anterior furrow wanting dorsally, clearly marked as a 

 broad, shallow furrow on approaching the ambitus. Ambitus below the 

 midzone. Rounded on the border, ventrally sunken around the peristome. 

 Apical disk anterior, 32 mm. from the anterior border and 65 mm. from 

 the posterior border of the test. Anterior ambulacrum straight and narrow, 

 flush dorsally, lying in the shallow furrow toward the ambitus. The paired 

 ambulacra are petaloid, of moderate width, slightly sunken. Ambulacra 

 II and IV widely divergent, at an angle of about 155° to each other. The 

 posterior pair I and V form an acute angle of about 50° posteriorly. Por- 

 iferous areas are wide, the pores elongate, comma-shaped, and united by 

 a furrow. Interporiferous area about the width of a poriferous. The 

 ambulacra are too incomplete for a full description. Larger tubercles are 

 scattered thickly over the surface of the test; the smaller abundantly fill 

 the spaces between the larger tubercles, but are visible only in favored 

 spots. The peristome is anterior, but details are not visible. The periproct 

 and details of the apical disk and fascioles are wanting. 



Height 50 mm., length 97 mm., width 85 mm. This species resembles 

 E. grandiflorus, but differs in that the ambulacral petals are very much 

 narrower and the apical disk is farther anterior. The paired petals are of 

 about the same width as are those of E. clevei, but petals II and IV are 

 much more divergent. Coming from Jamaica, from which island only a 

 few„fossil Echini are at present known, the specimen has a considerable 

 interest. It came in the same lot with the same lithological facies as 

 the Cidaris foveata, sp. nov., and Echinolampas ovumserpentis as here 

 described. 



Eocene, probably from the Cambridge formation of R. T. Hill, 

 Jamaica, no detailed locality; 1 specimen, Mus. Comp. Zool. No. 3237. 



Eupatagus clevei (Cotteau). 



(Plate 16, Figures 1, 2.) 



Euspatangus clevei Cotteau, 1875, Kongl. Sven. Vet. Akad. Handl., vol. 6, No. 6, p. 44, 



plate 8, figs. 1 to 4. 

 Eupatagus clevei Guppy (pars), 1882, Sci. Assoc. Trinidad, Proc., part 12, p. 199. 



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

 Species of medium size, elongate, rounded, and a little expanded ante- 

 riorly^ more narrow and truncate posteriorly; thick dorsally, swollen, a 

 little inclined anteriorly; high and subcarinate posteriorly. Ventrally 

 nearly flat, a little depressed anteriorly, presenting a slight elevation in 

 the posterior interambulacrum. Apical disk excentric anteriorly. Anterior 

 furrow very attenuate, nearly wanting. Anterior ambulacrum III straight, 

 narrow, long, with small pores scarcely visible. The paired ambulacra 

 are wide, petaloid, subflexuous, closed at their tips and unequal. The 

 anterior pair II and IV are widely divergent, but are not transverse, a little 

 arcuate; the posterior pair I and V are longer than the others, forming 

 between them an acute angle posteriorly. Poriferous areas are wide, a 

 little depressed, with pores rounded, very open, and united by an oblique 



