1x6 
ALASKA GEOLOGY 
Protothaca grewingkii sp. nov. 
Venerupis petitii 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, — Pop of Island, 3372. 
A form evidently belonging to the Veneridee 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 Dali. 
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, ia-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. 1, fig. 3c, 1828 .—-Grewingk, 
Beitrag NW. Am., p. 286, 1850.— -Ball, Proc. U. S. Nat. Mus., xxm, 
p. 322, pi. iv, figs. 15, 16, 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, — Pop of Island, 3372* 
A fragment of a large Solen , 22 mm. wide at its posterior end, was 
obtained by Mr. Kincaid. 
