PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 523 



NEW OR SPECIALLY INTERESTING SHELLS OF THE POINT BAR- 

 ROW EXPEDITION, 



By W. II. DAI^li. 



There beiug a doubt as to the time of publication of the Point Barrow 

 report as a whole, it was thought best, with the permission of Lieut. P. 

 H. Ray, acting signal officer, to publish a note on the new or more re- 

 markable forms, in order that the interesting results of the exertions of 

 Lieutenant Ray and party should not grow stale or be rendered obso- 

 lete by later researches. 



CEPHALOPODA. 



Octopus gronlaiidicus (Dew.) Morch. 



A fine specimen from Point Barrow, quite distinct from the O.punGtm- 

 tm, which is abundant to the southward. 



PULMONATA. , 



Cochlicopa lubrica (Mull.) Jeftr. 



Zonites (Conulus) stearnsii Blaud. 



Hyalina arcfica Lehnert, Science Record, June, 1884. 



Zonites (Hyaliiia) radiatula Alder. 



Hyalina pellucida Lehnert, 1. c. 



The above three species from moss off the tundra near Point Barrow. 



MARINE GASTRlOPODA. 

 Bela harpa u. 8, 



Shell fusiform, moderately thin, six whorled; whorls rounded, suture 

 distinct ; sculpture consisting of (on the last whorl) 23 stout, uniform, 

 slightly flexuous rounded ribs extending from the suture to the canal 

 with slightly narrower interspaces ; lines of increase distinct ; some- 

 times threadlike ; these a re crossed by numerous close-set spiral threads, 

 separated by narrow grooves, both faint near the suture ; threads grow- 

 ing stronger, regularly wider, and coarser gradually toward the canal, 

 near which they are stronger than the obsolete ends of the transverse 

 ribs; anal fasciole (notch band) indistinct, aperture narrow, elongated 

 with an acute posterior angle, outer lip thin, columella simi)le, canal 

 rather wide ; shell whitish, with a reddish tinge anteriorly, especially 

 on the last whorl; interior of aperture reddish, of the canal pure white. 

 Longitude of shell, 17.0; of last whorl, 12.5; of aperture, 10 0"*™. Lati- 

 tude of shell, 8.0; of aperture, S.S-""'. 



First found by Ball at Nunivak Island, in 1874. One specimen 

 dredged by the Point Barrow expedition in 13.i fathoms, 10 miles west 

 of Point Franklin, Arctic Ocean. Museum No. 40059. 



