80 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



latitude 18° 25' N., longitude 63° 29' W., and station 24, 390 fathoms 

 (713 meters), latitude 18° 38' 30" N., longitude 65° 05' 30" W. 

 One of these is given in the Challenger Report on the foraminifera, 

 the other in the volume on "Summary of Results." These stations 

 are in the immediate vicinity of that from which the type specimens 

 of the variety were obtained. An examination of the figures in the 

 Challenger Report show both the typical T. caperata and this variety 

 represented. Figure 3 shows a "young specimen" according to 

 Brady. Captain Potts who has kindly examined the Brady collection 

 for me reports that this specimen is from Challenger station 23 off the 

 West Indies. I have had very typical specimens from off the Phil- 

 ippines at a number of stations, some of which are almost identical 

 with the specimens figured by Brady. His other records are off the 

 Philippines, in 95 fathoms (174 meters), and off Kandavu, Fiji, in 250 

 fathoms (457 meters) . I also recorded what seems to be this species 

 from Albatross station D4781, in 482 fathoms (880 meters), near the 

 Aleutian Islands. 



This variety therefore takes the place of the typical form of the 

 species in the Atlantic, but what seems to me more probable, it will 

 be found to be a distinct species from the Pacific one when more 

 material is available. 



Tritaxilina caperata, var. atlantica— material examined. 



Genus CLAVULINA d'Orbigny, 1826. 



Clavulina d'Orbigny (type, C. parisiensis d'Orbigny), Ann. Sci. Nat., vol. 7, 

 1826, p. 268.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 393.— Chapman, The Foraminifera, 1902, p. 171.— Cushman, Bull. 71, 

 U. S. Nat. Mils., pt. 2, 1911, p. 72. 



Verneuilina (part) Parker and Jones, Quart. Journ. Geol. Sci., vol. 16, 1860, 

 p. 303. — Vanden Broeck, Ann. Soc. Belgique Micr., vol. 2, 1876, p. 136. 



Valvulina (part) Parker, Jones, and H. B. Brady, Ann. Mag. Nat. Hist., ser. 

 3, vol. 16, 1865, p. 35. 



Description. — Test free, elongate, cylindrical or angled; early por- 

 tion consisting of a number of chambers arranged triserially; later 

 portion consisting of numerous chambers arranged uniserially; 

 walls arenaceous, usually smooth, aperture in early chambers with a 

 valvular tooth; in the later portion aperture central or nearly so, 

 rounded, and with or without a tooth. 



