42 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



Figs. 40-41.— Proteonina difflugiformis. -10, a typi- 

 cal ELONGATE SPECIMEN OF FINE SAND GRAINS. X 80. 

 41, AN IRREGULAR SPECIMEN WITH LARGER SAND 

 GRAINS, THE LARGE FRAGMENTS AT THE LEFT CAUSING 

 A DISTORTION OF THE OUTLINE OF THE TEST. X 50. 



Description. — Test free, consisting of a single elongate oval or 

 pyrif orm chamber, with a more or less distinct tubular neck ; chamber 

 undivided; wall fairly thick, composed of closely cemented sand 

 grains of variable size and roughness; aperture simple, terminal; 

 color, varying with the material of the wall. 

 Length 0.36-0.75 mm. 



Distribution. — The various 

 records for this species are all 

 in rather cold or deep water as 

 far as the North Pacific is con- 

 cerned. Brady records it in 

 the deep water of the North- 

 west Pacific, in 2,300-3,950 

 fathoms. Goes found the spe- 

 cies in material from off the 

 west coast of Mexico and 

 40 41 southwest of Panama, Alba- 



tross stations D3415 and 3376 

 in 1,879 and 1,132 fathoms, 

 respectively. I have exam- 

 ined Goes's material from the 

 latter station. 

 Specimens referable to this species have been found in the Albatross 

 material from the Northwest Pacific, stations D4957, D4979, and 

 D5095, in 437, 943, and 58 fathoms, respectively. These stations 

 are in the cold area off the southeast coast of Japan. 



PROTEONINA DIFFLUGIFORMIS (H. B. Brady), var. LAGENARIUM (Berthelin). 



Haplophragmium lagenarium Berthelin, Mem. Soc. Geol. France, vol. 1, no. 5, 

 1880, p. 21, pi. 24, fig. 2. 



Reophax difflugiformis (part) H. B. Brady, Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, 18S4, p. 289, pi. 30, figs. 1, 5 (not 2-4). 



Reophax difflugiformis, var. lagenarium Millett, Journ. Roy. 

 Micr. Soc, 1899, p. 253, pi. 4, fig. 8. 



Proteonina difflugiformis-lagenarium Rhumbler, Arch. 

 Protistk., vol. 3, 1903, p. 247, fig. 80 c (in text). 



Description. — Variety differing from the typical b}' 

 lacking the distinction between body and neck; elon- 

 gate, exterior rough, usually smaller than the typical 

 and more nearly cylindrical. 



Length about 0.25-0.40 mm. 



Distribution. — This variety has been noted at but 

 two stations in the North Pacific, occurring at Nero station 1444, in 

 2,175 fathoms, near Guam, Ladrone Islands, and at Albatross station 

 D4967, 244 fathoms, off Japan. 



Fig. 42.— Proteo- 

 nina DIFFLUGIFOR- 

 MIS, VAR. LAGEN- 

 ARIUM. X 75. 



