168 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Collector. ~J. K. Oarpender. Oat. No. 28185, U.S.N.M. The best 

 specimen was found by Mr. E. W. Porter, and is now in the American 

 Museum of Natural History. 



HOLOPEA ARCTICA, new species. 

 (Plate XII, figs. 14-16.) 



This little Holopea has its nearest relation in H. ampla and Ef. simi- 

 lis Ulrich and Scofleld.^ It differs from the latter in having the 

 upper sides of the whorls less flat, the sutures deeper, and the lines of 

 growth more regular than in any other species of Holopea. From 

 H. ampla, the Arctic species differs in having the whorls expand less 

 rapidly. 



Collector.— A. H. White. Cat. No. 28190, U.S.N.M. 



? Family TEOCHID^. 



TROCHUS (?), species undetermined. 

 (Plate XII, figs. 11-13.) 



Of this form there is only one good specimen, and this has none of 

 the ornamental surface preserved. The specimen was sent to Mr. 

 Ulrich, and he kindly made the following notes: 



I regard it as related to some of the Gotland shells referred to Trochus by Lind- 

 strom, but as the specimen retains no trace of the sculpture-bearing layer of the shell 

 it can not be compared satisfactorily with described species. Liudstrom's T. den- 

 sistriatus, T. kolmodini, and T. wishyensis seem not far removed. 



The specimen is in the American Museum of Natural History. 

 Family SUBULITIDiE. 



FUSISPIRA INFLATA Meek and Worthen. 



Fusispira inflata Ulrich and Scofield, Geol. Minn., Ill, Pt. 2, 1897, p. 1075, 

 pi. Lxxx, figs. 17, 18. 



The only example of this species is an imperfect shell with most of 

 the smaller part of the spire missing. So far as comparison can be 

 made, the species is in harmony with F. inflata. Mr. Ulrich agrees that 

 the specimen belongs to this species. 



Collector.— 3. N. Carpender. Cat. No. L'8189, U.S.N.M. 



FUSISPIRA NOBILIS Ulrich and Scofield. 



Fusispira noMlis Ulrich and Scofield, Geol. Minn., Ill, Pt. 2, 1897, p. 1078, 

 pi. LXXX, figs. 2-4. 



The two Arctic specimens of this form are imperfect, and the largest 

 fragment indicates that the species here attained as large a growth as 

 in Minnesota, being about 4 inches in length. Mr. Ulrich has seen 

 the fragments and agrees that they represent his species. 



1 Geol. Minn., Ill, Pt. 2, 1897, pp. 1065, 1066. 



