158 Mr. H. r. Fulton ot Pniminii and Piipina. 



XVIJ. — 2\oies on Papuiiia a7id Pupiua. 

 By Hugh C. Fulton. 



On the Identfti/ (/ Papulna (Dendrotroclms) pumlla, Fulf., 

 with Deudrotroclius nientuin, Iledley. 



Since the publication of P. pumila in the 'Journal of 

 ]\Ialacology/ 1005, vol. xii. p. 22, pi. 0. figs. 5 &. (>, Mr. Clias. 

 Hodley has written me that it is ))rob:\bly his Dendrotrochufi 

 luentum, dcscribi'd in the ' Records Anstralian Museum/ 

 1899, p. 153, fig. 



Unfortunately I had omitted to look np tlio subgenus 

 Uendrotrochus in the Record, only having looked for I\i/)iiina. 



To make certain of the matter, I recently sent a cn-typii of 

 ]\ pumila to Mr. Iledloy, who now informs me that it is 

 identical with his D. mentum) my species therefore becomes 

 a synonyn). 



On Papuina Sellersi, Co.v, and P. migratoria, Pfr. 



Dr. Cox described P. Sellersi in the P. Z. S. 1876, p. (S'^<^, 

 \A. 52. fig. 9, and appears to have fixed no particular sjjeci- 

 nien as tlie type, but to have based the species on a number 

 of specimens ; the measurements of one specimen are given — 

 viz. : " diameter, greatest 0'78, least 0*5(), height 0'60 of an 

 inch," — but they do not agree with the figure given. 



After examination of a number of specimens bearing a 

 label in Dr. Cox's handwriting '' Typical P. Sellersi," I can- 

 not separate it from Pfeiflfer's P, 7nif/ratoria, a species most 

 variable in form and coloration. 



The two forms described as migratoria, Pfr., and Sellersi, 

 Cox, are linked closely together by specimens before me, which 

 show them to be one species having great variation in form 

 and coloration : some sj)ecimens are sharjjly curiuated, whilst 

 o'.hers have the last wliorl rounded; a feware quite imperforate, 

 whilst others are slightly perforate. 



Coloration varies from specimens all white, except for a 

 narrow dark brown sntural band, to specimens of yellowish 

 ground with broad spiral bands. 



All the varieties have inconspicuous oblique stria3, crossed 

 on the lower whorls by oblique, forward descending wrinkles, 

 which vary in strength ancl are almost absent in the var. 

 hncophaa. Cox. 



On Pujiina Thoin?0!ii, Foihes, and P. bidcntata, 

 C. K. IJeddom''. 



After comj)arison of typical specimens of the above- 

 mcMitijiied species, I am forced to the conclusion that P. l/i- 



