74 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io» 



measuring 10.1 mm. long by 7.8 wide is 4.5 mm. high. Practically 

 all of the Lepeta under L. concenirica and L. caecoides from the Sea 

 Horse Islands, Icy Cape, Plover Bay, and Indian Point are actually 

 L. caeca, and the others are too worn to be assigned to any species 

 with certainty. 



Dall's type lot of Lepeta alba, 13 specimens from Plover Bay, are 

 undoubtedly L. caeca; they are all worn shells in much too poor a 

 condition to base a description of a new species. Other specimens 

 under L. alba are so worn that identification cannot be certain; 

 from the shape, some appear to be L. caeca, others may be L. caecoides, 

 and perhaps some are L. concenirica, but without the apex and with 

 all the sculpture worn away they cannot be identified. The types 

 and cotypes of L. alba instabilis are all dead shells and so eroded 

 that a description should not be based upon them. 



DisTmBVTiON : Lepeta caeca has been reported from Jan-Mayen, 

 Spitzbergen, Norway, Iceland, Greenland, and from the Canadian 

 Archipelago to Newfoundland and Cape Cod (Thorson, 1944). It 

 has been taken from Point Barrow west and south to Captain's 

 Harbor in the Aleutians. The Alaskan localities are new. 



Suborder Rhipidoglossa 

 Family Fissurellidae 

 Genus Puncturella Lowe, 1827 



Puncturella noachina (Linnaeus, 1771) 



Plate 2, figure 5; Plate 4, figures 2, 7 



Patella noachina Linnaeus, 1771, appendix, p. 551. 



Puncturella noachina Jeffreys, 1865b, p. 257, pi. 6, fig. 2. — Odhner, 1912, pp. 13, 

 37, pi. 2, figs. 28-41.— Farfante, 1947, p. 138, pi. 60, figs. 1-3. 



One living specimen of this species was collected at a depth of 184 

 feet. The shell is 6.5 mm. long by 4.9 wide by 3.3 high. 



Other material examined : Numerous specimens from the western 

 Atlantic. About 17 specimens collected by Dall in Captain's Bay, 

 Unalaska, the Chica Islands, and the Shumagins; about 86 specimens 

 collected by W. J. Fisher at Kodiak Island; 1 specimen from Stephens 

 Passage (near Juneau). 



Discussion: Farfante (1947) states that this species has been 

 recorded from southern Indian Ocean, from the Sea of Okhotsk, from 

 Korea, and from Japan, and suggests that these latter records should 

 "be restudied to determine if they are Puncturella noachina or a closely 

 allied species." I examined a lot of 20 Puncturella (USNM 227297) 

 from Hakodate, Japan. These are not P. noachina. They have a 

 ^onger aperture, a wider and less funnel-shaped septum; they lack 



