in Tertiary Rocks of New Guinea. 205 



organism was briefly described and figured as Alveolina sp., and was 

 said to be associated with Orbitoides, Cycloclypeus, etc., and the 

 Nullipore Lithothamnium (Cumultpora) rosenbergi, Martin, now better 

 known as L. ramosissimum of Keuss, which is typical of Miocene 

 rocks. ^ The Orbitoides were stated to possess rectangular chamberlets 

 {lechtechige mediayikam merit), as seen on the median plane, thus implying 

 the presence of tlie Kocene genus Orthophragmitia. It is evident 

 that some confusion must have arisen with the material determined 

 by Martin to account for such an assemblage of forms, and it seems 

 fair to suggest that the Alveolina and the Orbitoides belonged to an 

 Eocene limestone, while the remaining organisms, Cycloclypeus, 

 Lithothamnium, etc., indicative of a Miocene origin, were, in all 

 probability, observed in another roi/k. Martin first of all determined 

 this limestone as Tertiary, although a year later ^ definitely placed 

 it in the older Miocene and in correlation with similar deposits of 

 Indo-Pacific countries. 



In his 1881 memoir, Martin likewise referred to certain limestones 

 he had examined fi'om Geelvink Bay localities and from islands off 

 the south-western end of New Guinea, mostly containing Orbitoides, 

 a small NuviDiulina sp., and Lithothamnium rosenbergi. They were 

 regarded as of Tertiary age, with a resemblance to the older Miocene 

 rocks of Timor, Java, and Sumatra. The Orbitoides were stated to 

 belong to the Lepidocycline group of the type of 0. gigantea of 

 Martin, from the Miocene of Java. 



Sclilumberger subsequently studied the same material as described 

 by Martin containing the so-called Alveolina sp., which had been 

 submitted to him by Dr. Wichmann.^ He was unable to recognize 

 tlie accuracy of Martin's Alveolina, but regarded the organism as 

 presenting structures belonging to the genus Lacazina of Munier- 

 Chalmas ; he therefore described and figured it under the new 

 specific designation of L. wichmanni. The author also remarked on 

 the interest of the discovery since Lacazina had hitlierto been 

 restricted to the younger Cretaceous rocks of Europe and Palestine, 

 and now, according to Martin's interpretation as to the age of the 

 New Guinea deposits, this genus couM be recognized af^ occurring in 

 the Tertiaries of that region. Schlumberger also mentioned that the 

 associated Foraminifera included Rotalinse, Miliolidse, and a true 

 Alveolina of the sub-genus Flosculina. Moreover, he had not seen 

 the assemblage of forms referred to by Schwager (in Martin), the 

 determinations of which he considered as of d"ubtful value. 



Martin* next iilentirted the presence oi Lacazina tvichmanni in some 

 detrital limestones from south-west New Guinea (Setakwa River, etc.) 



^ E. B. Newton & K. Holland, "On some Fossils from the Island of 

 Formosa, etc." : Journ. Coll. Sci. Imp. Univ. Tokyo, Japan, vol. xvii, art. 6, 

 pi. i, fig. 8, pp. 17-19, 1902. 



^ " Neue Fundpunkte von Tertiaergesteinen im Indischen Archipel " : 

 Samml. Geol. Keichs.-Mus. Leiden, vol. i, p. 178, 1882. 



^ " Note sur Lacazina wichmanni, Schlumberger, n.sp." : Bull. Soc. G^ol. 

 France, ser. Ill, vol. xxii, pi. xii, pp. 295-8, 1894. 



■* " Palaozoische, Mesozoische, und Kanozoische Sedime'nte aus dem siid- 

 westlichen Neu-Guinea " : Samml. Geol. Eeichs.-Mus. Leiden, vol. ix, 

 pp. 84-107, 1911. 



