Yol. 54.] OF BISSEX HILL (BAEBADOs). 551 



The previously-published list of Bissex Hill foraminifera (Glohi- 

 gerina-marl) contained 32 species : this number is now increased 

 to 120. Prom the combined lists of foraminifera here given, as 

 many as 15 are to be found only in fossiliferous strata ranging from 

 the Cretaceous to the Pliocene. These older forms are : — 



Nodosaria (Dentalina) spinulosa (Montagu). Eocene. 

 [J).) aculeata, d'Orb. Cretaceous-Miocene. 

 (D.) elegans, d'Orb. Eocene & Miocene. 

 (D.) Verneuili, d'Orb. Miocene. 

 {D.) Boueana, d'Orb.^ Miocene. 

 (jD.) paupercula, Reuss. Cretaceous. 

 longiscata, d'Orb. Eocene-Pliocene. 

 (Psecadium) simplex, Neugeb. Miocene, 

 Lingulina costata, d'Orb. Miocene & Older Pliocene. 

 Cristellaria excisa, Bornem. Oligocene. 



,, inornata, d'Orb. Eocene & Miocene. 



„ discoidalis, Costa. Pliocene. 



„ Clericii, Fornasini. Pliocene. 



„ Josephina, d'Orb. Miocene. 



Truncatulina kalemhergensis (d'Orb.). Miocene. 



It is plain, from the foregoing list, that the Miocene and Older 

 Pliocene species (and especially the former) are strongly in evidence 

 in the Bissex Hill Glohigerina-hedis, and even in the basal reef- 

 rock, and this is the more marked since some of these forms are 

 very common, such as Lingulina costata and Truncatulina Jcalem- 

 hergensis. Many of the forms known as recent, which are found at 

 Bissex Hill, are also well-known Miocene and Older Pliocene 

 species. 



The limestones and marls of Malta in some respects resemble the 

 Glohige7Hna-heds of Bissex Hill. On looking through the lists of 

 foraminifera from the Malta deposits given by Sir John Murray,^ 

 we notice that the foraminifera of the Blue Clays and Marls (classed 

 as Miocene by Puchs) appear to present the most striking analogy 

 with the facies obtained from the Bissex Hill beds, while the 

 Globigerina-limestone of Malta differs somewhat materially. 



The rich foraminiferal fauna of the Globigerina-heds of Naparima, 

 Trinidad, as recorded by Mr. P. J. L. Guppy,^ and classed by him 

 as Eocene, also bears a close resemblance to the facies of the Bissex 

 Hill beds, but before a complete comparison can be made the 

 foraminifera of the latter deposits must be worked out in further 

 detail. 



The species of Glohigerina found in the marls are perhaps all 

 comparable with known recent forms, but generally speaking they 

 have tests of abnormal thickness, which call to mind certain speci- 

 mens that I have seen occurring in cherty pebbles of Eocene age in 

 the Nile Delta-deposits. 



•^ Not to be confounded with the Nodosaria Boueana of d'Orbigny. 

 2 Scot. Geogr. Mag. vol. vi (1890) pp. 449-488. 



2 Quart. Journ. Geol. Soc. vol. xlviii (1892) pp. 533, 534; also Journ. 

 Trinidad Field-Nat. Club, vol. i (1893) no. xi. 



