THE NAUTILUS. 115 



under Jaminea, only once any older author. Hence the identifica- 

 tions of Draparnaud's names and figures, which seem to be sufficiently 

 certain, settle definitely the place of Risso's names. This results in 

 the following table for Jaminia : 



Risso's names. Pfeiffer's identifications. 



/. muscorum Drap. minutissima Hartmann. 



marginata Drap. muscorum Linne. 



edentula Drap. edentula Drap. 



secale Drap. secule Drap. 



tridens (L. Gmel.) Drap. tridens Miiller. 



granum Drap. granum Drap. 



sulculata Risso. unidentified. 



trilamellata Risso. '' 



heterostropha Risso. quadridens Miiller. 



quinquelamellata Risso. quinquedentata Born. 



septemdentata Risso. avenacea Brug. 



heptodonta Risso. unidentified. 



mnltidentata Risso. polyodon Drap. 



niso Risso. niso Risso (doubtful). 



Pfeiffer (Nomenclator, p. 356, No. 108) identifies J. edentula Risso 

 positively with Pupa edentula of authors, but under obscurus also 

 enters the name with a query, probably by some transposition of in- 

 dex slips, since the figure cited by Risso cannot represent obscurus, 

 which is elsewhere well figured by Draparnaud. This results in the 

 inclusion of Sphyradium and the exclusion of the Ena of Dr. Pils- 

 bry's table. 



Alsea of Jeffreys was proposed for dextral Pupillidse, but as this 

 distinction is practically valueless, we have to fall back on his list of 

 species and proceed by elimination to get the group which will bear 

 the name permanently. 



The table of equivalents for his original list is as follows in their 

 original order : 



Jeffreys' names (1830). Pfeiffer's identifications. 



1. Pupa marginata Drap. = muscorum L. not Drap. 



2. " nitida Jeffreys. = edentulum Drap. 



3. ' revoluta Jeffreys. = edentulum var. 



4. " cylindrica Jeffreys. = minutissima Hartmann. 



5. " vulgaris Jeffreys. = pygmcea Drap. 



6. " palustris (Leach MS.) 



Jeffreys. = antivertigo Drap. 



