52 TRANSACTIONS OF THE WAGNER FREE 



but of which (according to Mr. Conrad himself in correspondence with the late 

 F. B. Meek) page 65 only appeared about 18440^1845. The latter pages and 

 plates of this publication do not wholly correspond, some figures were dis- 

 tributed without text, and I believe for some of the text there are no figures. 

 However, on plate 49, M. dentiadata is represented by figure 10, though Mr. 

 Conrad afterward believed it to be intended for his ebicrneola, an uncertainty 

 not remarkable when we understand that the two names refer to the same 

 species. On the same plate Fig. 9 was referred by the text to his M.limaiitla 

 but erroneously. That species, according to Mr. Conrad, is represented by 

 figure II. Figure 9 represents the shell which (in Am. Journ. Conch. 1868, 

 p. 66, pi. 5, fig. 3) Mr. Conrad named Microspira oviformis and again, in 1870, 

 described the same specimen as new (with a reference to the same figure) un- 

 der the name oi Persiai/a ovida ! On the same plate figure 12 represents M. 

 ainerica7ia Conrad (MS ), of which no desci'iption appeared, only the name 

 being printed (cf Redfield's Catalogue of 7l/rt;-^/«f//rt in 1871, p. 261). It has 

 no characters which should separate it from M. cobiinba Lea. 



The recent shell was named in ignorance of the fossil, which indeed had 

 never been properly figured so as to render its characters unmistakable. 



The Caloosahatchie specimens are well developed. Some of them agree 

 exactly with recent shells from the coast of North Carolina. Some are marked 

 by a tendency to angulation at the periphery, though this is confined to certain 

 individuals. Emmons' figure, though coarse, is the best yet published. The 

 shells, whether recent or fossil, differ somewhat in size, and especially in stout- 

 ness ; the living ones vary from pure white, and white banded spirally with 

 yellow, to rich amber color all over, as does the next species. The name 

 opalina might be retained in a varietal sense for the amber variety. This has 

 been distributed by Col. E. Jewett and perhaps other collectors under the un- 

 published name of ^ melliflua Redfield. 



The particular characteristics oi M. denticidata, apart from its form, are the 

 strong, even plaits, of which when adult the posterior is strongest ; and the 

 outer lip denticulated only in the middle part and rounding anteriorly into the 

 edge of the columella without perceptible demarcation. 



Marginella aureocincta Stearns. 

 Marginella. {Glabella) aureocincta Ste.a.rns, Proc. Boston Soc. Nat. Hist. xv. p. 22, 1872. 

 Marginella virgmiana Verrill, Trans. Conn. Acad. Sci. vi. p. 420, 1S85. Not of Conrad. 

 Marginella Smithii Verrill, op. cit. p. 452, 1885. Bush, op. cit. p. 462, 1885. 



Range, fossil in the Caloosahatchie beds, and living from Virginia to 

 Florida. 



This species, though more slender and fusiform, is much like a small edition 

 of M. deiitictdata. In the recent shells the color varies from pure white to 

 amber or white banded with amber. Stearns's type was of the latter variety. 

 It is quite likely that M. exdis H. C. Lea ( 1 843, not of Gmelin ; M. siibexdis Or- 

 bigny) from the Tertiary of Virginia maybe the same thing as aureocincta, but 



