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JOURNAL OF MALACOLOGY. 



No. I. April 25111, 1904. Vol. XI. 



NOTES ON THERSITES (HADRA) BELLENDENKERENSIS, 

 BRAZ., AND BEDDOMAE, BRAZ. 



By HUGH Krr.TOX. 



Having examined an authentic specimen of l>rih.hnna>', h'la::., from the 

 collection of the late Capt. C. E. Beddome, I have no hesitation in placing 

 it as a variety of li''ll('niJ('n]i>jren><if^, Bvaz., a species that is most variable in 

 size and form. The variety heddomae is thinner, generally more depressed, 

 and the minute ziczac sculpture is more distinct, being just discernahle (on 

 fresh specimens) without a lens. 



The specimen mentioned above is of similar dimensions to the type, 

 but two other specimens before me, one of which was collected together with 

 /i^Ile>iden/,-''rr/isis in (Queensland by Emil Weiske, the other being in Dr. ("ox's 

 collection and labelled /"^/h'/cJtmh-erensix, are more depressed, viz. : 



maj. diam. : 41 ; alt. 30. (Coll. Weiske). 

 „ „ 38 ,; „ 28. (Coll. Dr. Cox) 



The original figure of Aie//''«'/'^/z/r(^yv?/?,s/.s- in the Proc. Zool. Soc, 1875, 

 t. 4, f. 4 and copied in Tryon's Manual, vol. vi, pi. 34, fig i does not agree 

 with the dimensions given in the description, viz. : Alt. i 7, greater diameter 

 22, lines ( = Alt. 36, maj. diam. 45 millim.) whereas the figure measures, 

 alt 45, maj. diam. 44 millim. 



Judging from specimens I have examined the figure is out of proportion, 

 l)eing much too high in proportion to its diameter. 



JouKN. OF Mai. AC, 1904, vol. xi, No. i. 



