SYSTEMATIC DESCRIPTIONS SPATANGINA. 89 



DD. Interporiferous areas widest proximally ; poriferous areas curved E. depressus 



CC. Petals very long, nearly or quite reaching ambitus, so that intrafasciolar area 

 covers all of abactinal surface. 



E. Width exceeds length E. abruplus. 



EE. Length exceeds width. 



F. Test high and narrow (height much more than half the length; width 



about 80 per cent, of length); petals II and IV straight ..... cubensis 

 FF. Test low and wide (height less than half the length; width about 90 per 

 cent, of length); petals II and IV curved forward. 



G. Test widest anteriorly; peristome little sunken E. elegans 



GG. Test widest posteriorly; peristome deeply sunken E. vaughani 



Eupatagus grandiflorus (Cotteau). 

 (Plate 15, Figures 5, 6.) 



Euspatangus grandiflorus Cotteau, 1875, Kongl. Sven. Vet. Akad. Handl., vol. 13, No. 6, 



p. 45, plate 8, figs. 5, 6. 

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



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



Species of large size, elongate, a little contracted anteriorly; dorsally 

 high, thick, and swollen; slightly carinate posteriorly; ventrally nearly 

 flat. Apical disk excentric anteriorly. Anterior furrow wanting near the 

 apical disk, more pronounced as it approaches the border, entering the 

 ambitus strongly. Anterior ambulacrum III straight, narrow, and long, 

 with very small pores, separated widely and scarcely visible. The paired 

 ambulacra petaloid, very wide, nearly closed at their tips, and unequal. The 

 anterior pair II and IV is a little arcuate in approaching the apical disk. 

 [They are widely separate, presenting an angle of about 140 to each other.] 

 The posterior pair I and V is just a little longer, less divergent, and forming 

 an acute angle [of about 55] posteriorly. Poriferous areas are wide, slightly 

 sunken; the pores are rounded and very open, united by a furrow. [Inter- 

 poriferous area very wide.] In the ambulacra II and IV, the anterior pori- 

 ferous area is very rounded and the pores become very small in approaching 

 the apex. The tubercles are of two kinds, as in all species of the genus; 

 the larger scattered, less developed than they are ordinarily, and some are 

 preserved in the posterior interambulacrum; the other kind of tubercles 

 are small, crowded, and homogeneous. Peripetalous fasciole nonsinuous, 

 the rest scarcely visible. 



Height 42 mm., length 74 mm. ; as the specimen is wanting posteriorly, 

 this measurement is inadequate ; if complete, it would doubtless be from 

 3 to 5 mm. longer; the width is 64 mm. 



Cotteau says that he had only a single specimen, which was from the 

 Cleve collection. It is very much worn and shows very little of the 

 surface characters, yet shows the petaloid ambulacra very well. Ambula- 

 crum III is very narrow; the anterior paired ambulacra II and IV are 

 very wide, 14 mm.; the posterior ambulacra I and V are a trifle nar- 

 rower, measuring 13 mm. in width. This species is to be recognized from 

 others by its size, shape, the anterior furrow, well marked at the ambitus, 

 and especially by the width of the paired ambulacral areas, which is a 

 striking character. 



Eocene, St. Bartholomew limestone, St. Bartholomew, Guppy collec- 

 tion ex Cleve, 1 specimen, holotype, U. S. Nat. Mus. No. 115371. 



