HILL: GEOLOGY OF JAMAICA. 149 
There are also two or three specimens of a large form which are either 
Operculina or Heterostegina. Jones has reported! the latter genus from 
the same horizon as that of the “shells and corals lately brought to 
England by L. Barrett, and described by J. Carrick Moore and Duncan,” 
in a collection which was clearly from the Bowden formation. 
Bryozoa. — The Bowden gravel bed contains numerous specimens of 
% species of Lunulites, associated with the corals, Foraminifera, and 
Mollusca. This form attains a maximum size of half a centimeter. 
Dall has also reported? Membranipora savorti Audovon, from the 
“Oligocene of Jamaica.” 
In the Bowden beds is a varied fauna of simple corals These in 
association with Foraminifera, 3ryozoa, Pteropods, and other Mollusca 
Occur in vast quantities in the gravel and marl at the foot of the bluff 
àt Bowden, and sparsely in the marl at Buff Bay. They have also been 
Teported by Duncan from Vere, the Clarendon coast, and from Navy 
Sland off Port Antonio; and erroneously reported from “Upper Clar- 
endon ” by other writers.® 
During our expeditions we made a large collection of corals from the 
Owden locality and these have been carefully restudied by Vaughan, 
Who adds several to the number of species. He reports the follow- 
Ng species from Bowden: Thysanus excentricus, Duncan ; Thysanus 
elegans, Duncan ; Placotrochus costatus, Duncan ; Placocyathus barretti, 
uncan; Placocyathus moorei, Duncan; Trochocyathus profundus, 
uncan; Lithophyllia ponderosa (Duncan), (non Montlivaltia ponde- 
tosa, Edwards and Haime); Circophyllia walli, (Duncan); Asterosmilia 
°P; Teleiophyllia probably grandis, Duncan; Porites sp. cf. furcata ; 
Porites sp. of the astræoides type, but with larger calices; Madre- 
Dora, gp, 
In addition to the species of coral previously described from Bowden 
Y Duncan, Vaughan notes that our collection “is especially interesting 
“cause it contains two determinable species of Porites and one of 
Madrepora, none of which have previously been described,” and “which, 
à în situ, contribute rather important information concerning the condi- 
"ons under which the Bowden beds were deposited.” 
Concerning the corals collected by us from the Bowden horizon at 
uff Bay, Vaughan reports that “it contains a specimen of Placocyathus 
barretti, Duncan, and an undescribed species of Dendrophyllia.” 
: The Geologist, 1864, Vol. VIT. p. 105. 
Proc. U. S. National Museum, Washington, 1896, Vol. XIX. No. 1110, p. 329. 
See Appendix to Jamaican Reports. 
