Fossil Echini of the West Indies Volume 306 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...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. rounded on the border, concave in the middle. Apical disk subcentral anterior to the center. Ambulacral areas are narrow, elongate, nearly straight, flush, narrowing at the tips, which, however, are widely open. The posterior ambulacra I and V are a little longer than the others; poriferous areas are narrow, not depressed, with unequal pores; the internal rounded, the external elongate, narrow, and oblique. The poriferous areas only cease to be petaloid at a very short distance from the border. Tubercles are scrobiculate, scattered, abundant, a little less crowded on the upper face than in the marginal region. Peristome opening in a depression of the lower face. Periproct transversely elongate, angular, placed very near the border. There is only a single specimen in the Washington collection. It measures 15.5 mm. in height, 33 mm. in length, and 29 mm. in width. Of this species Cotteau says it is very rare, but he does not say how many specimens he had, other than mentioning both the Cleve collection and the Museum at Upsala. The Cleve specimen differs so much in measurement from Cotteau's figures, and moreover is so imperfectly preserved, both dorsally and ventrally, that it is quite probable that Cotteau figured and made use of the Upsala specimen rather than this one in his description. This species is very...