28 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



Tinoporus pilaris was described by Brady. 



As lias already been noted in discussing the species from Santo 

 Domingo, occasional specimens of rare species in fossil deposits are 

 apt to be found again only after persistent search, as the chance of 

 finding them in any definite amount of material depends upon their 

 rarity. Therefore it is not surprising to find certain species, such as 

 Cristellaria italica, which could hardly be mistaken for anything else, 

 given in Parker and Jones's list from Bowden, but not seen since. A 

 single specimen only was found, according to the original list. 



In his Geology of Jamaica, Hill gives a list of the Foraminifera 

 identified by R. M. Bagg from Bowden. Except for changes in 

 nomenclature, this list is very similar to that given by Parker and 

 Jones. The list as identified by Bagg follows : 



Haplostiche soldanii (Parker and Jones). Gypsina globulus (Reuss). 



Textularia barrettii (Jones and Parker). vesicularis (Parker and Jones). 



trochus d'Orbigny. Cuneolina sp. 

 Orbiculina adunca (Fichtel and Moll). pavonia d'Orbigny. 



compressa d'Orbigny. Vaginulina legumen (Linn6). 



Cristellaria cultrata (Montfort). Nummulites ramondi d'Archiac. 



cassis (Fichtel and Moll). Amphistegina lessonii d'Orbigny. 



calcar (Linne"). 



Each of these lists contains the names of 14 species, with probably 

 7 species in common, or a possible total of 21 species. 



In this work I have had, through the kindness of Professor E. W. 

 Berry, of Johns Hopkins University, a considerable quantity of marl 

 from Bowden, and persistent searching has added a number of species 

 not previously recorded, and yet has not revealed certain species listed 

 by earlier workers; 17 of these seem to be additions to the previous lists. 



Allowing for possible mistakes in identification or duplication of 

 names, it seems fair to limit the present list to 31 species. A number 

 of these are also found in the Miocene of Santo Domingo, Cuba, 

 Panama, and the Coastal Plain of the United States. A few of the 

 Bowden forms seem on critical examination to be undescribed. 



The Bowden marl is characterized by an abundance of large species 

 of Haplostiche, Cuneolina, Cristellaria, etc., which do not occur in the 

 collections from the other Miocene formations, already referred to, and 

 in a way seems to be unique. It is a striking fact that the same species 

 and varieties of Haplostiche and Cuneolina are found living off the 

 Barbados in 100 fathoms. They may live at lesser depths in the same 

 region, but are not present in very shallow water of the tropics, so 

 far as records are available. Cuneolina is also abundant in similar or 

 lesser depths in the colder water off the Atlantic Coast of the eastern 

 United States, although no published records give this. The data 

 above given, therefore, suggest that, if the depth were slight, the water 

 conditions were cooler than at present. The presence of Orbiculina 

 and other Miliolidse in very small quantities and a lack of Polystomella 



