V 



M 



90 CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD. 



IE 





8 ' 



ES |; 



L 



>NI 



3NI 



Genus ROSTELLARIA Lamarck, 1799. 

 Subgenus Veatchia new subgenus. 



Description. — A single fragment of a shell was found at Soldado Rock, Bed 

 No. 2, which in general form resembles the subgenus Orthaulax Gabb. It differs, 

 however, from the latter in a very curious characteristic which marks it as alto- 

 gether sui generis. 



This differentiating character is the curving into loops of the posterior canal, 

 which is adherent to the upper portion of the body whorl. In this respect the 

 shell approaches the subgenus Calyptraphorus Conrad, in which the posterior 

 canal makes one semicircular curve over the dorsal side of the body whorl. 



Thus the subgenus Veatchia lies in an intermediate position between the 

 subgenera Orthaulax and Calyptraphorus. 



The writer dedicates this new subgenus to Mr. Arthur C. Veatch, of Wash- 

 ington, D. C, in pleasant memory of our geological work in Venezuela. 



Veatchia carolinae new species. Plate XII, Figures 14, 15, 16. 



Description. — Shell when complete rather large, thick and heavy, spire short, 

 obtusely pointed, whorls completely concealed, all the upper portion of the shell 

 being self-enrolled by the posterior prolongation of the last volution, which is 

 wrapped about the spire like a mantle; characters of the columella and anterior 

 canal not known; posterior canal described above under the subgenus. 



Height of fragment 27, greatest width 28, greatest thickness 21 mm. 



This species is named in honor of Mrs. Veatch. 



It is the type of the subgenus. 



Locality. — Bed No. 2, Soldado Rock, near the Serpent's Mouth, Gulf of Paria. 



Geological horizon. — Midway Eocene. Equivalent to the Midway of Alabama 

 and that of the Rio Maria Farinha beds, State of Pernambuco, Brazil. 



Genus CERITHIUM Adanson, 1757. 

 Cerithium harrisii new species. Plate XII, Figure 18. 



Description. — Shell rather small, solid, strong; conic, with an acute spire; 

 nuclear whorls two, smooth; subsequent whorls four, ornamented on the penulti- 

 mate volution by three spiral rows of bead-like nodules, with intervening faint, 

 spiral threads; last volution also with three prominent rows of beads alternating 

 with spiral threads, but with a similar, though more or less obsolete, ornamenta- 

 tion over the basal part of the whorl; penultimate whorl with a varix which angu- 

 lates the outline of the shell; body whorl with two rather strong varices. 



Height of shell 15, greatest width 5 mm. 



Remarks. — Dr. Guppy cites C. uniseriale Sow. and C. plebium Sow. from 

 Trinidad, to neither of which this shell bears any except a generic resemblance. 



Gabb briefly described about ten species of Cerithium from Haiti. These 

 have never been figured, and without the types it is almost hopeless to attempt 

 to recognize them. 



