108 REMARKS ON OLD-DESCRIBED AUSTRALIAN MOLLUSCA, 



three more immediately adjoining are crossed by transverse striae, 

 which produces a granulated appearance somewhat similar to that 

 of Solarium pe)'spectiv?i7n." 



" There are no longitudinal strise, however slight, on the surface. 

 The umbilicus is pure white, and the inner surface of the aperture 

 reflects the striae on the upper surface." 



Nine years after its description by Swainson, Mr. Arthur 

 Adams comes to the front w^ith another new generic and specific 

 name in the Proceedings of the Zoological Society of London, 

 1 863, p. 506, as Eutrochus, with the specific name of persj^ectivus. 



EuTROCHUS, A. Adams, 1863. 



''Testa trochiformis, tenuis, perspective umbilicata ; anfractihus 

 jjkinis, transversim liratis. Apertura suhquadrata, intus margari- 

 tacea, lahio rectiusculo, margine acuto, subrejlexo, aritice in dentein 

 ohtusum desinente." 



" A form of Trochidce most nearly resembling a Ziziphinus, 

 with a perspective umbilicus similar to that of Architectonica." 



Eutrochus perspectivus, A. Adams, 1863. 



" E. testa depresso-conoidea, late et profunde umbilicata, pallide 

 carnicolore, fulvo sparsim maculata et flammulis fulvicantibus 

 picta ; anfractibus 7, planis, transversim valde liratis, liris inaequa- 

 libus subdistantibus, ad suturas angulatis, anfractu ultimo ad 

 periomphalum granuloso ; apertura intus sulcata." 



"Alt. lin., lat. IJin. 



"The shell is broader than high, rather thin, and of a pale 

 yellowish flesh-colour, with fulvous blotches and flam mules. The 

 whorls are transversely ridged and angulate at the sutures, and 

 the interior of the umbilicus is white. Mr. Cuming possesses but 

 a single specimen from Tasmania." 



Type in British Museum. 



My esteemed friend Mr. H. A. Pilsbry could never have seen 

 the Proc. Royal Soc. Van Diemen's Land, 1854, Vol. iii. ; for if 

 he had I am quite sure he would have given Swainson's genus 

 and species credit, and not A. Adams' Eutrochits. The only 

 mention of Swainson's umhilicated species of Trochus is by Mr. 



