226 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Cristellaria orbicularis, var. subcarinata — Material examined. 



CRISTELLARIA ORBICULARIS (d'Orbigny), var. SUBUMBONATA Cushntan. 



Plate 44, fig. 3. 



Cristellaria orbicularis (d'Orbigny), var. subumbonata Cushman, Proc. U. S. Nat. 

 Mus., vol. 51, 1917, p. 657. 



Description. — Variety differing from the typical in its develop- 

 ment of ornamental characters, having a cluster of closely set raised 

 knobs over the umbilical region, giving a decidedh^ umbonate appear- 

 ance in face view, remainder of the test smooth. 



Distribution. — Type specimen (U.S.N.M. No. 9124) from Albatross 

 station D5259, in 312 fathoms (571 meters), off northwestern Panay, 

 bottom temperature 49.3° F. (9.6° C). Specimens were also found 

 in material from Albatross stations D5110, China Sea off southern 

 Luzon, 135 fathoms (247 meters), bottom temperature 59.0° F. 

 (15.0° C); D5152, Sulu Archipelago, 34 fathoms (62 meters); and 

 D5438, in 297 fathoms (543 meters), west coast of Luzon, bottom 

 temperature 46.2° F. (7.8° C.) 



Cristellaria orbicularis, var. subumbonata — Material examined. 



CRISTELLARIA ORBICULARIS (d'Orbigny), var. PAPILLATA Cushman. 



Plate 44, fig. 2. 



Cristellaria orbicularis (d'Orbigny), var. papillata Cushman, Proc. U. S. Nat. 

 Mus., vol. 51, 1917, p. 657. 



Description. — Variety with the keel reduced in width and the ear- 

 lier portion with an ornamentation consisting of fuie papillae rather 

 evenly scattered over the surface, in later growth gradually becom- 

 ing peripheral and in the last-formed chambers gradually becoming 

 obsolete. 



