2 88 NEiW MAiRINE MOI/LUSlCA. 



Locality: Type from lOO fathoms seven miles east of 

 Cape Pillar, with very many others; plentiful also in 80 

 and 40 fathoms off Schouten Island. 



The above are the dimensions and particulars of the 

 type, which I have selected as intermediary in the varia- 

 tion. It is a very variable form, and it is with some dilB- 

 dence that I attempt to establish it as a species ; the plica- 

 tions may vary from three to five or six, but are often 

 little more than wrinkles; the anterior one is always dis- 

 tinctly the strongest; the spire may be quite hidden when 

 the aperture is as long as the shell. There is also much 

 variation in size, some being scarcely more than 1.5 m.m. 

 in length. The most constant feature is the cylindrical 

 form. This seems intermediary between M. shorehami 

 P. and G. and M. angasi Braz., ]:)oth of which are ap- 

 proached by some of the variations. It is more cylindrical 

 than either of them, has a straighter aperture and colu- 

 m^ella than angasi, and a smaller spire, and less broad 

 shouldered form than shorehami, but it may eventually be 

 shown to intergrade wdth these two species, both of which 

 occurred with it. Plentiful and even more variable in 

 South Australia (Dr. Verco); Western Port, Victoria (C. 

 Gabriel). 



MARGINELLA INDISCRETA, N.S.P. (PL. XIV., 

 FIG. 12). 



Shell minute, pyriform, with a sunken spire, pure 

 white; aperture as long as the shell, very narrow above, 

 but widening towards the squared front; outer lip mode- 

 rately thickened, smooth, rising well above the summit 

 of the shell ; columella convex, bearing two plaits, the 

 anterior much the stronger; spire deeply sunken, but 

 showing a minute, mammillate apex. 



Length, 2 m.m.; breadth, 1.3 m.m. 



Locality : Type from 100 fathoms seven miles east of 

 Cape Pillar, with several others. 



It is with some hesitation I descril^e this form, which 

 seems to stand at one end of a variation of Avhich M. 

 simsoni Tate and May occupies the other; however, this 

 is so much removed from the latter, and somewhat de- 

 cidedly so from the next connection, that it seemed suffi- 

 ciently distinct to warrant description, but forms increas- 

 ing in number of plications and exertness of spire are 

 intermediate ])etween it and simsoni. 



