28 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



(pi. 43, figs. 6-8). 2 A reference to the figures of Quinqueloculina 

 undulata d'Orbigny given by Fornasini shows that the species has 

 a rather narrow, elongate aperture, and a very narrow tooth. Speci- 

 mens in my collection from Castel Arquato, Italy, one of the locali- 

 ties mentioned by d'Orbigny, are entirety identical with the original 

 figures of d'Orbigny and show the same type of aperture and general 

 characters of the test, the outer angles of which are not nearly so 

 sharply formed as in our South Pacific species. The figures given 

 by Heron-Allen and Earland show specimens with the same broad 

 aperture and flat tooth that are seen throughout our series. They 

 mention the close relation of their material to Quinqueloculina 

 nussdorfensis d'Orbigny, but topotype material of that species com- 

 pared with the figures shows that it has a narrow tooth and an elon- 

 gate aperture, with the sides truncate. They also mention Trilocu- 

 lina brongniartiana d'Orbigny in this connection, but that species 

 as developed in the West Indies is triloculine with a rounded periph- 

 ery, and an exserted neck, making it a very different species from 

 ours. 



The material that I have referred to Triloculina sub orbicularis 

 d'Orbigny 3 is also possibly to be referred to this same species. 



QUINQUELOCULINA SULCATA d'Orbigny 



Plate 7, Figures 5-8 



Quinqueloculina sulcata d'Orbigny, Ann.. Sci. Nat., vol. 7, p. 301, no. 17, 1826. — 

 Fornasini, Mem. Accad. Sci. Istit. Bologna, ser. 5% vol. 8, p. 363, fig. 9 (in 

 text), 1900. 



Test elongate, 2% to 3 times as long as broad, apertural end con- 

 siderably extended out beyond the main body of the test; chambers 

 distinct, elongate, in the early stages with a single angle at the 

 periphery, later becoming truncate with two distinct angles, and in 

 the adult typically with three raised costae; sutures fairly distinct, 

 not much depressed; wall smooth except for the costae; both ends 

 of the last-formed chamber extending beyond the previous chambers, 

 the apertural end tapering with a rounded opening, a definite lip, 

 and a simple tooth, which extends slightly beyond the rim of the 

 aperture in side view. Maximum length, 1.75 mm.; breadth, 0.6 

 mm. ; thickness, 0.3 mm. 



D'Orbigny's original material of this species was from the Red 

 Sea, an area that is closely associated in its fauna with that of the 

 general Indo-Pacific region. Although this species was not really 

 known until the publication of Fornasini's paper in 1900, it seems 



2 The Foraminifera of the Kerimba Archipelago, Trans. Zool. Soc. London, vol. 20, pt. 2, 

 pp. 543-794, pis. 40-53, 1915. 



8 U. S. Nat. Mus. Bull. 71, pt. 6, pi. 21, fig. 3, 1917. 



