84 CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD. 



Locality 



Along the shore 700 feet east of the Brighton pier, Trinidad 



Island, in an impure asphalt 



Geological horizon 



Judging from the indications reviewed under the genus 



Cymia, and from the distribution of this series, the writer believes the horizon 

 in which the shell was found to be approximately equivalent to the Chipola 

 epoch (Upper Oligocene) of Florida. 



Genus MUREX Linnaeus, 1758. 



Murex cf. domingensis Sowerby. Plate XII, Figure 3. 



Cf. Murex domingensis Moore, Quart. Jour. Geol. Soc. London, vol. VI, p. 49, pi. X, fig. 5, 1850. 



A fragment of an interior cast of a Murex was found in the ferruginous marl 



south of Pitch Lake. 



In its general form it suggests Murex domingensis which is found in Jamaica, 

 Haiti, and Cumana, Venezuela. It may perhaps be a cast of that species, but 

 no definite determination is possible because of the fragmentary and imperfect 



condition of the fossil. 



Locality.— Southern main road, just south of Pitch Lake, Brighton, Trinidad, 



in a yellowish-brown, ferruginous bed. 

 Geological horizon. — Upper Oligocene. 



Genus CASSIS (Klein, 1753) Lamarck, 1799. 

 Cassis (Phalium) guppyana new species. Plate XII, Figures 5, 6. 



Description.— Young specimens small, short and very rounded so as to appear 

 almost globular; whorls about four or five; spiral sculpture of (1) fine revolving 

 strise which are most strongly marked on the lower part of the last volution, 

 where, in well preserved shells, they alternate with finer raised lines, and (2) 

 of three carinse, one on the shoulder and two below; the humeral carina in all 

 the specimens bears short, spinous nodules, while the two below either are nearly 

 smooth (as in the figured shell) or are decorated with smaller nodules ; characters 

 of the columella and aperture concealed by the indurated matrix. 



Height of fragment figured 13, greatest diameter 9 mm. 



A fragment of part of the outer lip of a Cassis was found in the same bed 

 as the young shells described above. The strong probabilities are that this is a 

 fragment of an adult individual of the same species. 



r It shows six well marked 



plications which, judging from the curve of the fragment, would be situated 

 near the central part of the outer lip. 



Remarks— The Soldado Cassis is very closely allied to Cassis (Phalium) 

 brevidentatum (Conrad) Aldrich. 61 This has typically a single row of nodules 

 on the shoulder, although Professor Harris has figured 62 a variety from the 

 Alabama Lignitic with the two lower carinae nodular on the back of the shell 

 but not in front. That variety, however, differs from the Soldado shell in being 



Cassidaria brevidentatum Aldrich, Jour. Cinn. Soc. Nat. Hist., p. 152, pi. 3, fig. 20, 1885. 

 62 Proc. Acad. Nat. Sci. Phila., p. 479, pi. 22, fig. 10, 1896. 



