CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD. 79 



columellar characters are lost. But the anterior canal appears not to have been 

 sharply reflexed. In this as well as in the general form of the spire it resembles 

 mediavia. 



Locality. — Bed No, 2, Soldado Rock, Gulf of Paria. 



Geological horizon. — Midway Eocene. 



Genus MELONGENA Schumacher, 1817. 

 Melongena melongena Linnaeus. Plate XI, Figure 5. 



Pyrula melongena Linnssus, Syst. Nat., Ed. 12, 1220. 

 Pyrula melongena Guppy, Geol. Mag., p. 438, 1874 (pars). 

 Melongena melongena Tryon, Man. Conch., vol. Ill, p. 107, 1881. 



Remarks. — This species does not extend below the Pliocene. In the Oligocene 

 of Jamaica and Haiti and in the Manzanilla beds of Trinidad there is a closely- 

 related form, Melongena consors Sowerby. Gabb in 1873 regarded the latter 

 species as identical with the Pliocene and recent M . melongena; but Dr. Guppy in 

 1876 questioned this, — and Dr. Dall in 1890 after examining the Santo Domingan 

 shells decided they were specifically distinct. 



As is characteristic with the genus, M. melongena varies greatly in the develop- 

 ment of spines. It is found living throughout the West Indies. Some specimens 

 are occasionally entirely smooth and devoid of spines; but according to Tryon 

 there are usually on adult shells one to three rows of spines on the upper part of 

 the body whorl and an additional row half way to the base of the whorl. This is 

 the case with the shell figured from the Quaternary of Venezuela. This speci- 

 men shows three rows of spines on the shoulder and one row near the base of the 

 shell. 



This species evidently flourished in the fauna of the raised beach near Guanoco, 

 where it is well developed and abundant. It also occurs in the Pliocene and 

 recent faunas of Trinidad. A large specimen measures 90 mm. in length and 68 

 in breadth. 



Locality. — The Barranca, along the Guanoco and La Brea railroad about a 

 mile northeast of Guanoco, Venezuela. 



Geological horizon. — The fossils occur in a raised beach of Quaternary age. 



Genus PSEUDOLIVA Swainson, 1840. 

 Pseudoliva bocaserpentis new species. Plate XI, Figure 6. 



Description. — On first examination, this shell appeared as a varietal form of 

 P. scalina Heilprin 52 from the Midway Eocene of Alabama. But further study 

 makes it appear rather as a distinct species. The single specimen obtained from 

 Soldado Rock is unfortunately fragmentary but shows very well marked char- 

 acters. These place it in an intermediate position between Pseudoliva scalina 

 and P. ostrarupis Harris 53 from the Midway of Texas. The Soldado shell re- 

 sembles scalina in having longitudinal plications on the body whorl, but these, 



52 Proc. Acad. Nat. Sci. Phila., p. 371, pi. 20, fig. 12, 1880. 



53 Proc. Acad. Nat. Sci. Phila., p. 75, pi. 8, figs. 3a, 1895. 







