92 



BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



This species is recorded in the volume of the Challenger report on 

 the "Summary of Results," from station 237, 1,875 fathoms, east of 

 Japan. The record is followed by a question mark, as though there 

 were some doubt about the correctness of the determination. 



REOPHAX SPICULIFER H. B. Brady. 



Reophax spiculifera H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, p. 54, 

 pi. 4, figs. 10, 11; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 295, pi. 31, 



figs. 16, 17. — Egger, Abh. kon. 

 bay. Akad. Wiss. Miinchen, vol. 

 18,1893, p. 258, pl.4,fig.l9(?).— 

 Chapman, Proc. Zool. Soc. Lon- 

 don, 1895, p. 14. 



Description. — Test composed of 

 a few chambers, broadest at the 

 posterior end of each and grad- 

 ually narrowing to the apertural 

 end; wall composed of elongate 

 sponge spicules arranged in gen- 

 eral lengthwise of the chamber, 

 often projecting back toward the 

 posterior end of the chamber; 

 aperture circular. 



Length about 1 mm. 



Distribution. — In the volume of 

 the Challenger report on the 

 "Summary of Results" this spe- 

 cies is recorded with a question 

 mark from stations 237 and 246, 

 1,875 and 2,050 fathoms. I have 

 not met with it in the material I 

 have examined from the North 

 Pacific. 



REOPHAX EXCENTRICUS, new species. 



Description.— Test small, com- 

 posed of a nearly straight linear 

 series of chambers, the size rapidly 

 increasing with each newly added 

 chamber; wall composed of sand 

 grains, rather neatly cemented 

 together; aperture at the end of a short tubular neck at one side of 

 the axis of the test, varying somewhat in the amount of its eccen- 

 tricity; color gray. 



Length, 1.5 mm.; diameter of last-formed chamber often 0.6 mm. 



Fig. 134.— Reopiiax excentricus. x 80. 



