16 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



well developed in the Indo-Pacific in shallow water of coral reefs. 

 Besides the type locality where the species is common and well de- 

 veloped, it has also occurred in the material from Guam Anchorage, 

 Ladrone Islands, 21 fathoms. It occurs in the Philippines, where 

 it is often common and grows to large size. 



Genus CLAVULINA d'Orbigny, 1826 



Clavulina d'Orbigny, Ann. Sci. Nat., vol. 7, p. 268, 1826. — Cxjshman, U. S. Nat. 



Mus. Bull. 104, pt. 3, p. 80, 1922; Cushman Lab. Foram. Res. Spec. Publ. 



No. 1, p. 127, 1928. 

 Verneuilina (part) of authors. 

 Valvulina (part) of authors. 

 Tritaxia (part) of authors. 



Genotype. — By designation, Clavulina parisiensis d'Orbigny. 



Test elongate, cylindrical or angled, early portion consisting of 

 chambers arranged triserially, in most species quickly followed by 

 a uniserial series, but in some primitive species with a biserial stage 

 between; wall arenaceous; aperture, in the early stages, a simple 

 opening at or near the inner margin, later becoming terminal, often 

 with a neck, in some species with an apertural tooth. 



Cretaceous to Recent. 



CLAVULINA COMMUNIS d'Orbigny 



Plate 4, Figures 3 a, h 



There is a single large specimen figured here that may be referred 

 to this species. It is from Albatross Station H3816, latitude 15° 16' 

 50" Si, longitude 147° 52' 30" W., in 450 fathoms. The typical 

 form of the species is often common in shallow water of the Mediter- 

 ranean, and it is surprising that it has not occurred in many of the 

 shallow-water Pacific samples included in this paper. 



CLAVULINA PACIFICA Cushman 



Plate 4, Figures 4, 7, 9 



Clavulina angularis H. B. Brady (in part) (not d'Orbigny), Rep. Voy. Challen- 

 ger, Zoology, vol. 9, p. 396, pi. 48, figs. 22-24, 1884. 



Clavulina pacifica Cushman, Carnegie Inst. Washington Publ. 342, p. 22, pi. 

 6, figs. 7-11, 1924. 



Test elongate, early portion triserial, short, trihedral; later por- 

 tion uniserial, the sides parallel or nearly so, triangular in transverse 

 section, the sides flat or somewhat convex; chambers fairly high; 

 sutures distinct, depressed, curved; wall arenaceous, but very 

 smoothly finished, last-formed chamber tapering toward the aper- 



