148 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



Eocene to Miocene rarely ; this is not very abundant. Amphistegina 

 lessonii, d'Orb. ; Tertiary and rare Eecent. Synonymy, A. vulgaris, 

 A. hauerii, d'Orb. ; Miocene. 



This bed at Bowden must be Miocene. The material from Bowden, 

 Jamaica^ is undoubtedly Miocene. 



Concerning these Foraminifera Bagg says : " The Foraminifera from 

 Bowden, Jamaica, are essentially tropical species which existed in rather 

 shallow waters of less than 300 fathoms, while many occurred at 

 depths of only a few fathoms and still exist. I have recognized 

 the species Orbiculina adunca in the Pliocene deposits of the Caloosa- 

 hatchie River, Florida. This species, though ranging throughout the 

 Tertiary period, did not become plentiful until Miocene time. Cris- 

 tellaria calcar^ Linne, another shallow water form, is remarkable for its 

 large size, reaching nearly y\ in. in diameter in the Bowden specimens. 



Gypsina globulus, Reuss. This curious little fossil, round, as its name 

 implies, and as large as double B. B. shot, is very abundant in the Bow- 

 den material. This is the genus described as Tinoporus, Ceriopora, etc. 

 Professor Brady in the Challenger Report says of this form, and its rela- 

 tive G. vesicularis, '' Both have been obtained in the fossil condition 

 from the Miocene formation of Austria and Hungary, Malta and 

 Jamaica, and from the Pliocene of Costa Rica, and, according to Parker 

 and Jones, from the Tertiary beds of Palermo, Bordeaux, and San 

 Domingo." 



The species Textularia harretti is still living in shoal waters off the 

 West Indies. It is a curious type of the genus, being compressed at 

 right angles to the usual plane of compression. 



Ilaplostiche soldani is the form described as Lituola soldani, but is 

 now placed by Brady under the genus Haplostiche. It still lives off 

 the West Indies, but was most abundantly developed during the Miocene 

 period. 



There are numerous specimens from the Bowden gravel which have 

 an aspect which might be, and probably have been, mistaken for Orbi- 

 toidos.^ Jones has also reported Orbitoliua from Yere,^ where other 

 Bowden fossils are found, and from the supposed Pliocene Pteropod marls 

 of Jamaica. 



1 Jones has said that " Orbitoides liave long been, and still sometimes are, mis- 

 taken for Nummulinne, Orbitolites, and Orbitolinas, — all very different one from 

 another ; and even when they are rccop:nizcd, it is often difficult to get at their 

 specific characters." — The Geologist, 18G4, Vol. VII. p. lOG. 



2 Ibid., p. 104. 



