BY C. HEDLEY. 391 



Compared feature by feature with the European carnivores, radical 

 structural differences are detected. Like Thylacinus and Canis 

 or Notoryctes and Chrysochloris, this seems an instance where the 

 same mode of life has moulded dissimilar organisms to the same 

 external form. Having divorced novoseelandica from Daudeha.rdia , 

 a new genus is necessary for its reception, which may thus be 

 provisionally outlined. 



Family TESTACELLID.E. 

 ScHizoGLOSSA, gen.nov. 



Shell worn on the tail, incapable of containing the body, and 

 reduced to the function of a shield to the lungs and heart, 

 rudimentary, paucispiral, naci-eous within, columella excavated 

 into a pit for the reception of the shell-muscle. Animal lacking 

 rachidian teeth. 



Type and only known species S. novoseelandica, Pfeiffer. 



ScMzoglossa appears to me referable to that section of the 

 Testacellidce embracing its compatriots, Rhyttda, Elea and Pary- 

 phanta, with which the lack of rachidian teeth and the simplicity 

 of the genitalia allies it. Of these perhaps Parypho,nta stands 

 the closest. 



EXPLANATION OF PLATES. 

 Plate ix. 



Fig. 1. — Spirit specimen of Schizof/lossa novoi^edandica, Pfr., seen from 



above. Magnified. 

 Fig. 2. — Ditto, seen from tlie right side, showing respiratory orifice. 



Magnified. 

 Fig. 3. — Posterior portion of shell of ditto, seen fi-om beneath, showing 



muscle-scar and tubercles on the columella. Magnified. 

 Fig. 4. — Genital system of ditto. Magnified. 

 Fig. 5. — Tail of Testacella haliotidea, Draparnaud, copied from the 



"Histoire Naturelle des MoUusques terrestres et fluviatiles de 



France," PI. v., fig. 9, to show position of respiratory orifice 



(/) for comparison with fig. 2. 



