AR<TLARTA. 





M. JONASI, Dunker. PL s, figs. 29-32. 



Wliitish, yellowish or ash-color, usually chestnut at the suture 

 mid base, with sometimes a central chestnut band. Spire and 

 upper portion of body whorl ribbed, sometimes cut into nodules 



below the suture. Length, -4--G inch. 



Port Jackson, Australia. 



N. Burchardi, Dunker (fig. 30), is in every respect typical. 

 X, lal><><-iila. A. Ad. (fig. 31). and X. nnnri. A. Ad. (fig. 32). nre 

 evidently the same species. 



N. CALLOSA, A. Ad. PL 8, figs. 33, 34. 



Very broadly gibbons when adult, with wide-spreading, thick 

 margined callus; ribs small, distant, sometimes cancellated and 

 nodulous; white, three banded with chestnut or sulfused with 

 with olive. Length, '4--5 inch. 



Philippines, in sandy mud at seven fathoms ; Indian Ocean. 



This may be only a variety of the preceding species, from 

 which it is distinguished principally by form and sculpture. X. 

 rafloft/n'ra, A. Ad. (fig. 34 . is synonymous. 



X. t'ANVKLLATA, A. Ad. PI. 8, fig. 35. 



Light brown, maculated with darker brown. Length. '0 inch. 



Philippines. 

 The type is said to be rather thin mid semitransparent. 



X. MANCKUOIDKS, Lleeve. PL X, fig. 36. 



Solid, dark ash-color ; whorls tuberculated at the upper pact, 



tubercles here and there prolonged into ribs, interstices cancel- 

 lated. Length, -ri inch. 



Pnrt J<n'k*nn, Avxtrnliit (Annas'. 

 May be only a more solid growth of A". <-<inci'IInf(i. 



X. IJMUJOSA, <J,uoy. PL H, iigs. :5T. :\*. 



Longitudinally finely plicated, crossed by revolving stri;e; 

 yellowish white, tinged or nearly covered with chocolate, with 

 frequently a while central band. Length, 'ft-'IJ") inch. 



New Ireland, \ 



A', cldf/trft/fi. Kiener (fig. :-IS . is the same. 



X. JJKANIFKKA. Kiener. PI. ,S, figs. :','.> U. 



White or yellowish, t ubercul:ite. Length. <'.-!) inch. 

 N /" ( 'rut ral I'nlyiHuia : hie of 



