. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. FORAMINIFERA IN THE RAISED REEFS OF FIJI. 363 Amphistegina occurs in eleven slides, and is often abundant, as is the case in the rock from Eua, 120 ft. Although rotaline Foraminifera occur in many of the slides, no form is common. The most generally occurring genera are Planorbulina and Truucatulina. Globigerina occurs in four slides. Orbitoides is of espe- cial interest, as it is not found in rocks younger than the Miocene. In- dividuals are very numerous in the section from Mango, 310 ft., and it is notewor
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. FORAMINIFERA IN THE RAISED REEFS OF FIJI. 363 Amphistegina occurs in eleven slides, and is often abundant, as is the case in the rock from Eua, 120 ft. Although rotaline Foraminifera occur in many of the slides, no form is common. The most generally occurring genera are Planorbulina and Truucatulina. Globigerina occurs in four slides. Orbitoides is of espe- cial interest, as it is not found in rocks younger than the Miocene. In- dividuals are very numerous in the section from Mango, 310 ft., and it is noteworthy that the genus is entirely absent from the other Mango specimens examined. The Nine rocks are characterized by the great number of tunicate spicules which they contain. The first described occurrence of these organisms as fossils was in the Pliocene of St. Erth, Cornwall, where Messrs. Kendall and Bell found spicules referred by Dr. G. J. Hinde to Leptoclinum.^ Professor Herdman had pre- viously pointed out that calcareous spicules oc- curred in many genera of Tunicata, and were as capable of preservation as tlie aragonite skeletons of other organisms.^ As, however, with the ex- ception of the St. Erth beds above-mentioned. ,, , , , , , n ^ â , ' Fig. 13. Niue, Vailoa, they do not seem to have been found m the jg f^. Tunicate spicule fossil condition, their occurrence in the coral (Leptoclinum), surface reefs of Niue becomes of interest. ' view, x 300. Although Niue (Savage Island) is situated between the Tonga and Fiji Groups, and the rocks of all three places resemble each other in structure and composition, the tunicate spicules appear to be confined to Niue (with the doubtful exception of Ngilliugillah). They also occur, however, in the rocks from Christmas Island collected by Dr. C. W. Andrews, and in the Funafuti boring described by Dr. G. J. Hinde. In all three cases, Niue, Christmas Island, and Funafuti, the spicules seem identical and belong to the same genus, Lep
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