28 



Bulletin 30 



444 



Oliva Cristobalcoloni, n. sp. 

 Oliva brevispira Gabb. 

 Mitra Henekeni Sby. 

 Fusus Henekeni haitensis Sby. 

 Melongena consors Sby. 

 Phos fasciolatus Dall. 

 Strombina Nanniebellas, n. sp. 

 Murex cornurectus Gpy. 

 Cassis sulcifera Sby. 

 Phalium inoniliferum Gpy. 

 Pyrula Pilsbryi Smith 

 Cypraea Henekeni Sby. 

 Cypraea spurca Linne. 

 Trivia globosa Gray. 



Amusium papyraceum Gabb. 



Pecten caimitica, n. sp. 



Venericardia scabricostata Gpy. 



Divaricella prevaricata Gpy. 



Diplodonta puncturella Dall. 



Cardium haitense Sby. 



Pitaria circinata Born. 



Pitaria planivieta Gpy. 



Chione Woodwardi Gpy. 



Chione (Lirophora) Hendersoni Dall. 



Tellina riocanensis n. sp. 



Macoma cf. constricta Bruguiere. 



Semele Claytoni, n. sp. 



Solen obliquus Spengler. 



Corbula vieta Gpy. 



Affinities of the Zone I Fauna. — The reciprocal percentages 

 are as follows ; 14 to G, 11. 5 to H, 6 to Bluff 3, .5 to Zone A, .4 

 to D. The strongest bond is with G, next in order come H and 

 Bluff 3 . But there is next to nothing in common with A and D . 



Geology of the Rio Yaguajal 



A characteristic view of the Rio Yaguajal near Sabaneta is 

 shown on Plate iA of this bulletin. A general description of 

 Sabaneta and its surroundings is given in the narration of our ex- 

 pedition, Bulletin 29, page 4. The location is shown on the 

 Sketch Map facing page 10 of that bulletin. 



The composition of the beds is well shown by several bluffs 

 along the Yaguajal. These exhibit considerable variation. At 

 one place the basal layer will be a heavy gravel, at another a 

 pure, hard blue clay. When traced even in a short distance the 

 pure clay may merge horizontally into gravel. In nearly all the 

 bluffs the blue clays alternate with gravel and locally lignite 

 seams are present, as in the Cana section. Elsewhere the clay 

 may contain large, rounded concretions also as along the Cana. 

 In the upper parts of the bluffs the clays have weathered to a 

 yellowish hue. No fossils were found in place. 



