74 BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



development tending to break up into a series of raised rounded 

 bosses, the largest near the umbo and thence diminishing in size 

 toward the periphery, in the last-formed chambers the whole becom- 

 ing a single raised ridge; wall between the sutures in the earlier 

 development closely set with small raised papillse becoming less 

 numerous or wanting on the later-formed chambers; periphery with a 

 slight keel and each chamber with a long acicular spine. 



Length without spines about 2 mm. 



Distribution. — The only North Pacific record for this beautiful 

 species is that given by Brady, a single Challenger station off the 

 Philippines in 95 fathoms. 



This species combines many of the characters of C. calcar and G. 

 papillosa. 



CRISTELLARIA PAPIIXOSA (Fichtel and Moll). 



Plate 37, fig. 2. 



Nautilus papillosus Fichtel and Moll, Test. Micr., 1803, p. 82, pi. 14, figs. a-c. 

 Cristellaria papillosa Parker and Jones, Ann. Mag. Nat. Hist., ser. 3, vol. 5, 



1860, p. 113, No. 17.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 



1884, p. 553, pi. 70, fig. 16. 



Description. — Test close coiled, composed of numerous chambers, 

 peripheral margin acute but not distinctly carinate; biconvex, sutures 

 limbate, the thickenings developing into a series of rounded knobs, 

 largest near the umbo and gradually decreasing in size toward the 

 periphery; the wall in the earlier development between the sutures 

 is more or less covered with fine raised papillas, but these are not 

 developed in the last-formed chambers. 



Length about 2 mm. 



Distribution. — This species has not previously been recorded from 

 the North Pacific. The only material I have had is from the Inland 

 Sea of Japan, depth not recorded. It is typical. 



CRISTELLARIA MAMILLIGERA Karrer. 



Plate 34, fig. 6. 



Cristellaria rnamilligera Karrer, Novara Exped., Geol. Theil., vol. 1, pt. 2, 1864, 

 p. 76, pi. 16, fig. 5. — H. B. Brady, Rep. Voy. Challenger, Zoology, p. 553, 

 pi. 70, figs. 17, 18. 



Description. — Test close coiled, composed of numerous, compara- 

 tively long-tapering chambers, sutures limbate, occasionally enlarging 

 into rounded bosses at the inner end; test biconvex, somewhat 

 umbonate; peripheral margin extended into a well-developed carina. 



Length up to 2 mm. 



Distribution. — Brady records this species in the North Pacific from 

 a single Challenger station, 95 fathoms, off the Philippines. I have 

 had material only from Albatross station D4900, off Japan, in 139 



