64 FOSSIL ECHINI OF THE WEST INDIES. 



Echinolampas lycopersicus Guppy. 

 (Plate 11, Figures 3 to 6.) 



Echinolampas lycopersicus Guppy, 1866, Quart. Jour. Geol. Soc. London, vol. 22, p. 300, 

 plate 19, fig. 8. Cotteau, 1875, Kongl. Sven. Vet. Akad. Handl., vol. 13, No. 6, 

 p. 21, plate 3, figs. 22 to 26; 1881, Ann. Soc. Geol. Belgique, vol. 9, p. 20; 1897, 

 Bol. Com. Mapa Geol. Espana, vol. 22, p. 59, plate 19, figs. 1 to 3. Lambert, 

 1915, Mem. Soc. d'Agric. de 1'Aube (Troyes), vol. 79, pp. 21, 29. 



The following is an extract from Cotteau's description of this species: 



Species of large size, oval, elongate, rounded anteriorly, a little angular 

 posteriorly; upper face moderately swollen, thick on the borders; lower 

 face nearly flat, slightly cushion-like, subconcave around the peristome. 

 Apical disk excentric anteriorly, ambulacral areas wide, petaliform, sub- 

 costulate, very open distally and yet distinctly contracted at the lower 

 end. Poriferous areas depressed, with very unequal pores, the internal 

 rounded, the external long, narrow, transverse. At some distance from 

 the ambitus the ambulacra cease to be petaloid and are reduced to very 

 small pores directly superposed. Around the peristome the pairs of pores 

 are more apparent and increase a little. Tubercles scrobiculate, crowded, 

 homogeneous, everywhere abundant. The peristome is narrow, a little 

 excentric anteriorly, sensibly elongate in the transverse direction, and 

 furnished with a very evident floscelle. Periproct transverse, elliptical, 

 inframarginal. Apical disk compact, granular, circular, and furnished 

 with four large genital pores. 



A specimen which is apparently the original one figured by Guppy 

 measures 22 mm. in height, 40.5 mm. in length, and 30.5 mm. in 

 width. A larger specimen in the same lot of cotypes measures 27 mm. 

 in height, 53 mm. in length, and 46.5 mm. in width. This species, 

 which is very abundant in the islands of Anguilla and Porto Rico, is 

 very uniform in character and varies principally in the height of the 

 test. While most specimens are quite low, some, especially from Porto 

 Rico, are much higher and dome-shaped. 



Echinolampas lycopersicus is very similar to E. ovumserpentis. A 

 comparison of the two species is made under the description of the 

 latter. The essential distinction of lycopersicus is the anterior position 

 of the apical disk, the larger size of the periproct, the flatness of the 

 lower side, and the shallowness of the peristome. Also, the petals are 

 shorter and less unequal. E. lycopersicus is also very close to anguilla, 

 from which it differs in its less massive form and less deeply sunken 

 peristome. 



Oligocene, Anguilla formation, Anguilla, Guppy collection, cotypes, 

 being Guppy 's original material, 6 specimens, all well preserved, U. S. 

 Nat. Mus. No. 115388. Anguilla, W. M. Gabb collection ex R. J. L. 

 Guppy, cotypes, 3 specimens, Philadelphia Acad. Nat. Sci. No. 3353. 

 Anguilla, Guppy collection ex Cleve, labeled as the originals of Cot- 

 teau's plate 3, figures 22 to 26, to which they closely correspond, 3 

 specimens, U. S. Nat. Mus. No. 115387. Cotteau mentions that 

 besides the Cleve collection he had material of this species from the 

 Stockholm Museum. 



