Il6 ALASKA GEOLOGY 



Protothaca grewingkii sp. nov. 



Venerufiis fietitii var. GREWINGK, Beitrag, NW. Am., p. 278, pi. v, figs. 2a- 

 2e, 1850 ; not of Deshayes. 



Localities. Unga Island and near the Pavlof volcano on the Penin- 

 sula of Alaska (Grewingk). 



This shell belonging to the group of Protothaca staminea Conrad, 

 formerly called Tapes, is obviously distinct from that species (which 

 was later named V. petitii by Deshayes) by reason of its coarser 

 radial sculpture and other characters evident on comparison. 



Protothaca? sp. 



Locality. Popof Island, 3372. 



A form evidently belonging to the Veneridce and perhaps to Proto- 

 thaca but without traces of radiating sculpture near the beaks, where 

 alone the shell is partly preserved. 



It has a free, deep, ample pallial sinus subangular in front ; has the 

 beaks in the anterior third, smooth interior margins, rather bluntly 

 rounded ends and arcuate base. The general form is rounded-quad- 

 rate. It is 45 mm. long, 39 mm. high, and 19 mm. in diameter, the 

 measurements being taken from the internal cast. 



Macoma (edentula Broderip and Sowerby, var.) grewingkii Dall. 



Tellina edentula BROD. & SBY., Zool. Voy. Blossom, p. 134, pi. 41, fig. 5, and 

 pi. 44, fig. 7, 1839; Zool. Journ. iv, p. 363. GREWINGK, Beitrag NW. 

 Am. p. 284, pi. vn, figs. la-ic, 1850. 



Locality. Unga Island (Grewingk). 



This shell has much the form of the recent species to which Gre- 

 wingk referred it as a variety, but is probably distinct, as the form of 

 the pallial sinus is not the same. I have not been able to examine 



specimens. 



? Tellina (Peronidia) lutea Gray. 



Tellina lutea GRAY, Index Test. Suppl., pi. i, fig. 3c, 1828. GREWINGK, 

 Beitrag NW. Am., p. 286, 1850. DALL, Proc. U. S. Nat. Mus., xxm, 

 p. 322, pi. iv, figs. 15, 1 6, 1900. 



Locality. Unga Island (Grewingk). 



I have not seen specimens, but when they are obtained it may well 

 happen that they will prove distinct from the recent T. lutea. 



Solen sp. 



Locality. Popof Island, 3372. 



A fragment of a large Solen, 22 mm. wide at its posterior end, was 

 obtained by Mr. Kincaid. 



