50 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



usually two in number, situated at either end near the base; color 

 grayish white. 



Diameter 0.5-1.0 mm. 



Distribution. — The only published records for this species in the 

 North Pacific are those of Goes, Albatross station D3399, in 1,740 

 fathoms off Panama and station D3419, in 772 fathoms off the 

 west coast of Mexico. I have examined the material selected by 

 Goes, consisting of five specimens attached to Rhabdammina and 

 Saccammina. One of these specimens is figured here. This shows a 

 slight tendency toward division as do certain other specimens. 

 Goes a shows a longitudinal section of a specimen indicating a 

 division into three chamberlets. Figures 211 and 212 referred to this 

 species by Goes are really Webbinella hemisphxrica (Jones, Parker, 

 andH. B.Brady). 



I have found a single specimen from Blake Reef, south of Japan, 

 Albatross station H4881, 316 fathoms, which seems to be an imma- 

 ture specimen of this species. It is attached to a fragment of shell, 

 slightly less convex than larger specimens, but otherwise similar. 

 Another single specimen was found from Albatross station D5056, 

 in 258 fathoms on the east coast of Japan, attached to a specimen of 

 Batliysiplion filiformis. A third single specimen is from D4979 off 

 Japan attached to a specimen of Rhabdammina. 



Genus WEBBINELLA Rhumbler, 1903. 



Webbina Jones, Parker, and H. B. Brady, Pal. Soc. Monogr., 1865, p. 27 (not 

 Webbina d'Orbigny, 1839).— H. B. Brady (part), Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 348.— Chapman, Ann. Mag. Nat. Hist., ser. 6, vol. 18, 

 1896, p. 326. 



Psammosj>heera Eimer and Fickert (part), Zeitschr. wiss. Zool., vol. 65, 1899, 

 p. 671. 



Webbinella Rhumbler (part), Arch. Protistk., vol. 3, 1903, p. 228. 



Description. — Test adherent, circular in outline, the central por- 

 tion convex, the peripheral portion often forming a flattened rim 

 about the central portion; chamber single, undivided, wall of medium 

 thickness, composed of sand grains with much cement, aperture not 

 apparent, the pseudopodia being thrust out at the basal portion of 

 the test near the line of its attachment. 



The genus Webbinella as thus amended will exclude Webbinella 

 clavata (Jones and Parker), which is placed in the genus Ammolagena, 

 which seems very distinct. Webbinella as here understood contains 

 the single species described below. 



oKongl. Svensk. Vet. Akad. Handl., vol. 25, no. 9, 1894, pi. 6, fig. 215. 



