SYSTEMATIC DESCRIPTIONS SPATANGINA. 59 



slope of the test from the apical disk to the ambitus. While apparently 

 most abundant in the island of Anguilla, E. semiorbis has quite a wide 

 distribution, having been found in Cuba and the Panama Canal Zone. 



Cotteau, 1875, gives the locality for this species as St. Bartholomew, 

 and this is repeated in his Spanish report, 1897. It is, however, an 

 entire mistake. This error was strongly pointed out by Guppy in 

 19 II. 1 Also, Vaughan tells me that no such material is found in St. 

 Bartholomew. The geological horizon of the rocks in St. Bartholo- 

 mew is Eocene and the lithological facies is entirely distinct from the 

 Anguilla rocks. The fossils of St. Bartholomew are dark blue-gray, 

 whereas those from Anguilla are a light yellowish-buff. 



Oligocene, Anguilla formation, Guppy collection, cotype, figured by 

 Guppy in Quart. Journ. Geol. Soc., plate 19, fig. 7, U. S. Nat. Mus. 

 No. 115386. Another specimen from Anguilla, Guppy collection, also 

 labeled as a type [cotype], U. S. Nat. Mus. No. 115383. Whether 

 either of these two specimens is the original of Cotteau's 1875 figures is 

 not certain; but the first one mentioned, and here reproduced (No. 

 1 15386) , may well have been the basis of his published figures. Cotteau 

 mentions having specimens from Cuba in his own collection. Crocus 

 Bay Hill, roadside descent to Crocus Bay from Valley, Anguilla, T. W. 

 Vaughan collector, 1914, 4 specimens, U. S. Geol. Sur. station 6893. 

 Crocus Bay, Anguilla, T. W. Vaughan collector, 1914, 24 specimens, 

 U. S. Geol. Sur. station 6894. Southwest side of Crocus Bay, 30 to 

 50 feet above sea-level, Anguilla, T. W. Vaughan collector, 1914, 6 

 specimens, U. S. Geol. Sur. station 6966. Lambert reports from the 

 "Miocene" of Anguilla numerous specimens of semiorbis in the British 

 Museum. Oligocene, Finca Carillo, near River Hanabana, El Caimito, 

 Cuba, from Dr. Carlos de la Torre collection, 1 specimen, beautifully 

 preserved, Mus. Comp. Zool. No. 3231. 



In addition to the above localities for this species, Cotteau gives 

 San Martin, Matanzas, Cuba, collection of Comisi6n del Mapa Geo- 

 logico de Espana. It also occurs in the Oligocene Emperador limestone 

 of the Panama Canal Zone, Las Cascadas, Gaillard Cut, several 

 specimens, collected by D. F. Macdonald and T. W. Vaughan, U. S. 

 Geol. Sur. stations 58666 and 6019G. 



Echinolampas antillarum Cotteau. 

 (Plate 9, Figures 10 to 12.) 



Echinolampas antillarum Cotteau, 1875, Kongl. Sven. Vet. Akad. Handl., vol 13, No. 6, 



p. 19, plate 3, figs. 9 to 12. 

 Echinolampas ovumserpentis Guppy (pars), 1882, Scientific Assoc. Trinidad, Proc., part 12, 



p. 196. 



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



Species of medium size, oval, elongate, rounded anteriorly, subtruncate 

 posteriorly; upper surface very little swollen, lower face cushion-shaped; 



1 Quart. Jour. Geol. Soc. London, vol. 67, p. 685. 



