BY R. ETHERIDGE, JUX. 205 



Genus PARALLELODON, Meek and Worthen. 



Parallelodon subarguta, De Koninck. 



Palizarca subarguta^ De Koninck, Foss. Pal. Nouv. Galles du 

 Sud, 1877, pt. 3, p. 287, Atlas, t. 16, f. 8, 8\ 

 Ohs. — Several small shells appear to correspond with De 

 Koninck's description of this species, but I am unable to compare 

 the interior characters. The shell is suboval, with a rather 

 obliquely truncated posterior end, an inflated body, inconspicuous 

 umbones, and rather distant growth laminae. 



Genus EDMONDIA, De Koninck. 



Ohs. — A single valve, much embedded in matrix, may possibly 

 belong to this genus. It is short and rotund, and has the general 

 outward appearance of the EdmondicE. The concentric ornament 

 of the shell is, however, rather coarse for this genus, and reminds 

 us rather of that of Pachydomus. 



GASTEROPODA. 

 Genus MOURLONIA, De Koninck. 

 MouRLONiA HUMiLis, De Koninck. 



Pleurotomaria humilis, De Koninck, Foss. Pal. Nouv. Galles du 

 Sud, 1877, pt. 3, p. 325, Atlas, t. 23, f. 14. 



Sp. char. — Shell depressed conical, of five or six whorls; the 

 body whorl enlarging but slowly until near the mouth; band 

 moderately wide but not deep, with thread-like bounding carinas, 

 becoming quite sutural on the older whorls ; inner lip a little 

 reflected ; umbilicus small. 



Obs. — Mourlonia is a conical or discoid section of the older 

 genus Pleurotomaria, usually with a large and deep umbilicus. 

 The band is persistent, placed near the suture, in the form of a 

 groove, and bounded by two keels. The present shell fulfils all 

 these conditions, except that the umbilicus is small. 



