ON THE FORAMINIFERA OF THE KERIMBA ARCHIPELAGO. 295 



Foraminifera of the Kerimba Archipelago. 



Messrs. E. Heron-Allen, F.L.S., F.Z.S., and Arthur Earland, 

 F.R.M.S., read the second portion of their memoir on the 

 " Foraminifera of the Kerimba Archipelago, Portuguese East 

 Africa." 



As noted on a previous occasion, the similarity existing 

 between the general facies of the gatherings and those which 

 form the subject of the late Mr. F. W. Millett's Monograph on 

 the Foraminifera of the Malay Archipelago * and the reason for 

 that similarity still defy explanation. The zoological interest 

 of the district lies in the fact that since cl'Orbigny published the 

 result of his examination of sands from Madagascar in 1826 f , 

 the district never received attention from protozoologists until 

 Brady reported the result of his examination of some shore 

 sands from Tamatave, Madagascar, sent to him by Mr. Kitching, 

 in which he rediscovered the comparatively rare and beautiful 

 form Pavonina flabettiformis %. D'Orbigny gave an unsatis- 

 factory description and figure of this species in 1826 §, and an 

 equally unsatisfactory " Moclele " which was discussed by Messrs. 

 Parker and Jones in their " Nomenclature of the Foraminifera " ||, 

 who thought it " possibly a symmetrical Peneroplis but more 

 probably a semidiscoidal modification of Orbitolites." We have 

 searched the cl'Orbigny collections both in Paris and La Rochelle 

 in vain for any type-specimens. It was reserved for Brady to 

 rediscover the species in many tropical localities and it is one 

 of the most frequent of the striking Kerimba types. 



The romance attaching to it is, however, insignificant compared 

 with that which surrounds an organism to which cl'Orbigny gave 

 the nomen nudum, Rotalia dubia %. Unlike the case of Pavonina 

 flabettiformis, of which there is a finished Planche inedite in 

 Paris but no type-specimens, of Rotalia dubia there is a water- 

 worn type-specimen in Paris but no finished Planche inedite. 

 D'Orbigny's original sketch of the organism, however, is there, 

 and Fornasini of Bologna has published a tracing of it,** sent to 

 him by Berthelin ff with a statement that he doubted whether 

 it was a foraminifer at all, and not an ostracod, and this appear- 

 ance is certainly borne out on a superficial view of the type- 



* F. W. Millett, 1898, etc., J. R. Micr. Soc. 1898-1904. 



f A. d'Orbigny, Tableau Methodique des Cephalopodes, Ann. Sci. Nat. 1826, 

 vol. vii. 



X This is his account in the "Challenger Report," 1884 (p. 375). In his Pre- 

 liminary Report, however, on the Reticularian Rhizopods of the Challenger 

 Expedition (Q. Journ. Micr. Sci. n.s. vol. xix. p. 282), he states that he found it in 

 shallow-water sand dredged by Dr. E. Perceval Wright in the Seychelle Islands and 

 refers to Ann. & Mag. Nat. Hist. 1877, ser. 4, vol. xix. p. 105 {error for p. 41). 



§ Loc. cit. p. 260, pi. x. figs. 10, 11, Modele no. 56. 



|| Ann. & Mag. Nat. Hist. 1863, ser. 3, vol. xii. p. 440. 

 TT d'Orbigny, Tableau Methodique des Cephalopodes, 1826, p. 274, no. 34. 

 ** See Fornasini, " Specie Orbignyane," Mem. Ace. Sci. 1st. Bologna, 1908, ser. 6, 

 vol. v. p. 46, pi. i. fig. 14. 



ft See Fornasini, Rend. Sess. Ace. Sci. 1st. Bologna, 1897-8, vol. ii. p. 11. 



