34 BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



POLYSTOMELLA CRATICULATA (Fichtel and Moll). 

 Plate 19, fig. 4. 



Nautilus craticulatus Fichtel and Moll, Test. Micr., 1803, p. 51, pi. 5, figs. h-h. 



Polystomella craticulata d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 284, No. 3. — 

 Carpenter, Intr. Foram., 1862, p. 279, pi. 16, figs. 1, 2.— H. B. Brady, 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 739, pi. 110, figs. 16, 17.— 

 Egger, Abh. kon. bay. Akad. Wiss. Miinchen, CI. n, vol. 18, 1893, p. 433, 

 pi. 20, figs. 24, 25.— Millett, Journ. Roy. Micr. Soc, 1904, p. 604. 



Description. — Test subglobose, composed of as many as fifty cham- 

 bers in the last formed coil; in face view broadly lenticular about 

 1£ times as long as wide, periphery bluntly rounded; umbilical region 

 umbonate, filled with clear shell material for one-third or more of the 

 diameter of the test, with large pores ; remainder of surface reticu- 

 late; aperture a long, narrow opening subdivided into a number of 

 pores. 



Diameter up to 3.5 mm. 



Distribution. — Brady records this species from three North Pacific 

 Ohallenger stations, Chinese Sea, Hongkong Harbor in 7 fathoms and 

 Honolulu coral reefs, Hawaiian Islands, in 40 fathoms. The only 

 material I have had was collected by Dr. E. A. Mearns from shore 

 sands, Cebu, Philippine Islands. 



This is distinctly a tropical shallow-water species, and a large and 

 beautiful one. Very probably it is widely distributed in the shallow 

 waters about the islands of the southern portion of the North Pacific, 

 although material is not available. 



POLYSTOMELLA SIBIRICA Goes. 



Plate 19, fig. 1. 



Polystomella sibirica Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, 1894, 

 p. 100, pi. 17, fig. 814. 



Description. — Test broad, complanate, much compressed, made up 

 of about 25 chambers in the last-formed volution; in face view about 

 3 1 to 5 times as long as wide, sutural lines showing a double line of 

 pores, umbilical region filled with clear shell material, porous; aper- 

 ture a series of small pores in a V-shaped arrangement. 



Diameter up to 4 mm. 



Distribution. — This species was found at but one station, Albatross 

 D 3600 in 1 56 fathoms in Bering Sea. At this station it was abundant 

 and it probably has a general distribution in this region from which 

 comparatively little material is available. It is a large and striking 

 species. 



