308 



PROCEEDINGS OF THE ACADEMY OF 



[Part II 



Area idiodon. Wilmington, N. C. 



Pecte?i uselmce Pils. & Johns. Bowclen, Miocene. 



PTEROPODA. 



LIMACINIDAE. 



Limacina inflata (Orbigny) Text-flg. 1. 



Planorhella imitans Gabb, Trans Amer. Philos. Soc, xv, 1873, p. 201 ; Proc. A. 



N. S. Phila. 1872, p. 270, pi. 11, fig. 2 (1873). 

 Atlanta mflataOrhigny, Voy. dansl'Amer. Merid. v,p. 174, pi. 12, figs. 16-19. 

 Limacina inflata (d'Orb.), Pelseneer, Challenger Reports, Zoologj^, xxiii, p. 



17. 



Gabb 's figure of this species is poor, giving the idea of a bilater- 



Fig. 1. Planorhella imitans Gabb, upper, profile and basal views of the type 

 {= Limacina inflata). 



ally symmetrical discoidal spiral, 

 whereas the spire is very little sunken, 

 and the umbilicus is deep. The type is 

 somewhat broken and not quite ma- 

 ture, 1 mm. in diameter. We do not 

 hesitate to refer it to the recent L. 

 inflata, for which there are many At- 

 lantic and Antillean records. 



Besides the type of Planorhella im- 

 itans, no. 2895 A. N. S. P., there are 

 two smaller examples and some frag- 

 ments. 



The term Planorhella Gabb (not 

 Haldeman) maybe added to the syno- 

 nymy of Lmacma. It is identical with 

 Embolus, which includes openly um- 



Fig" 2. Vaganella undulata (Gabb) .^^^/^^^^ Limacinas with slightly sunken 

 two views of the type. spire, and more or less of a median 



projection of the lip in the adult stage. 



