1898-1902. No. 32.] FOSSIL FAUNAS FROM SERIES B. 31 



Hormotoma (?) sp. 



PI. VIII, fig. 9. 



We have an incomplete cast of a medium-sized conical gasteropod 

 (apical angle about 20) with 7 volutions, but several missing. No more 

 exact determination is possible. 



Occurrence: B, upper part, over the fragment-limestone, Valley 

 south of Borgen. 



Ctenobranchina. 



PyramidelJida e. 



Loxonema PHILLIPS. 



Loxonema fitchi HALL. 



PI. VIII, fig. 10. 



1859. Loxonema fitchi HALL. Pal. New York, vol.3, p.296, pi. 54, figs. 9, 11. 

 1913. Loxonema fitchi OHERN. Geol. Survey of Maryland. Low. Devo- 

 nian p. 467, pi. 79, fig. 7. 



A medium-sized, slender, subcylindrical gasteropod, represented by a 

 few imperfect casts which seem to agree completely with the descriptions 

 and figures of this species which is reported also from casts only from the 

 Helderbergian of New York and Maryland. However, an identification 

 of gasteropods based on casts will generally be a little uncertain, so 

 that no very great value for purposes of correlation can be ascribed to 

 these specimens. It is also with hesilation that I place the specimens 

 under Loxonema, they too may possibly belong to Hormotoma, or 

 another related genera of the Murcfiisoniidae. 



In the most perfect specimen I have counted five volutions, very 

 characteristic in their straight margins and great height. At least three 

 whorls at the top, however are missing. 



Occurrence: B, lower part, Reindeer Valley. B, upper part, over 

 the fragment-limestone, Valley south of Borgen. 



Litorinidae. 

 Holopea HALL. 



Holopea sp. 

 PI. VIII, fig. 11. 



Only a single and incomplete cast of a small form occurs, allowing 

 no specific determination. Outline broadly conical, about four volutions, 

 lower end incomplete. The volutions show a subcircular section and a 

 smooth surface. 



Occurrence: B, lower part, Reindeer Valley. 



