INSTITUTE OF SCIENCE, PHILADELPHIA. 253 



Genus TURBONILLA Risso. 



Subgenus Ondina De Folin. 



Ondina De Folin, Las Fonds de la Mer, i. p. 214, 1869; name only ; ex. O. sulcata De 



Folin. 

 Ondina De Folin, Classif. coq. fam. Chemnitzidcs, Ann. Soc. Lin. de Maine-et-Loire, xii. 

 1870 (extra copies p. 10). 

 lb. Const, meth. fam. Chemnitzidce , Soc. Agr. Hist. nat. et Arts utiles de Lyon, 1885, 



P- 15- 

 Auriculina Gray, 1847, non Grateloup, 1838. 



Shell of the form of Odontostouiia, but with a somewhat twisted pillar 

 without a plait, like that of Tarbonilla s. s. The surface is spirally striated 

 and the throat not lirate. 



The first mention of the name was in 1869, when it was used as above 

 cited in the text, without a diagnosis, for the 0. sulcata, which, however, is 

 named Odetta sulcata on the plate and agrees with the diagnosis of the section 

 Odetta as simultaneously proposed by De Folin in the paper on the classifica- 

 tion of Chemnitzidce . It appears that 0. sulcata must have been referred to 

 Ondina by an inadvertence, and since the plate was drawn by the author him- 

 self, that his application of the name Odetta must be regarded as correct. 



In the diagnosis of the " family Chemnitzid^ " no types or species are 

 mentioned, and the "genus Ondina" remained without any specific exemplar 

 until 1872, when an Ondina semi-ornata was described by De Folin from the 

 Gulf of Gascony, which agrees with his diagnosis and must be regarded as 

 the type of the group (Les Fonds de la Mer, ii. p. 48, pi. ii. fig. i, 1872). 

 Regarding the Auriculina of Gray, founded on Od. obliqua Alder, as synony- 

 mous with Ondina, Dr. Fischer in his manual (p. 788) gives 0. obliqua as an 

 example. He refers the group to Odastoinia as a section, but it is, perhaps, 

 preferable to regard it as bearing to Turbonilla proper such a relation as 

 Odontostomia bears to Syrnola. 



Turbonilla (Ondina) fragilis n. s. 

 Plate 20, figure 5. 



Pliocene of the Waccamaw River, South Carolina, Johnson. 



Shell small, thin, with an acute spire, a sinistral, half-immersed nucleus 

 and five and a half subsequent whorls ; surface polished, the summit smooth, 

 the whorls gradually becoming finely, evenly spirally striate ; whorls full, yet 

 slightly flattened toward the periphery, giving them a turriculate appearance ; 

 base ovately rounded, with a minute chink behind the reflected pillar-lip ; 

 outer lip thin, pillar slightly thickened, the lips united across the body by a 

 thin deposit of callus, anterior edge of the aperture evenly rounded into the 

 pillar, which is slightly twisted ; throat smooth ; suture very well marked, but 

 not channelled. Lon. 4.75 ; max. lat. 2.25 mm. 



This is a very neat little shell which, so far, has not turned up in the 

 Caloosahatchie beds. 



