150 



inner lip produced posteriorly into a kind of channelled tri- 

 angular elevation. I have dedicated this species to Mr, 

 Augustus Simson, of Tasmania, late of Port Denison, Queens- 

 land, an indefatigable collector and investigator into every 

 department of Natural History. • 



Nassa TASMANICA. n.s. -A^. t. acumbiato-ovata, soltdiuscula, iiUidacas- 

 tanea, luteo-castanea, vel fulva ; spira suh - acuta ; granoso-plkata (in 

 ult. anfr. plic. 17), plicis supern6 divisis, anfractibus 5, convexis, striatic, 

 striis suh-dhitanlihus, in ult. anfr. 11 ; aptrtura ovata, nitida, alba ; lahro 

 solido, supjernfi. sub-caUoso, ivtus dentato (dente coiisjAcua in medio); colu- 

 mella valde callosa, callositate alba subrecurva. Long. 12. Lat. 7. 



N. shell acumiuately ovate, somewhat solid, shiningchestnut, 

 yellowish chestnut or brown, spire sub acute ; gr anosely plicate 

 (plaits 17 in last whorl), plaits divided above by a channel; 

 whorls 5, convex, striate ; striae sub-distant ; 11 in last 

 whorl ; apertui'e ovate, shining, white ; outer lip solid, sub- 

 callous above ; toothed within, a conspicuous tooth in the 

 middle, columella very callous, with a white subrecurved 

 callosity. 



This species is smaller than N.fasdata and iV^ fauperata, 

 which it closely resembles in every respect except size, color, 

 and the white callosities at the mouth. It is a pretty con- 

 spicuous shell, found only on the North and East Coast, where 

 it is rather common. In N.fasdata the plicas are very distinctly 

 granulate throughout. In N. pauperata they are sub-obsolete 

 except above, and in the present species they are scarcely dis- 

 tinct, except the one which is separated by a groove at the 

 suture. On the whole it is nearer to N. pauperata than to 

 N.fasc. A shell very like it, oocurs in Port Jackson — N. 

 jacksoniana, as far as size is concerned, but it is white or 

 banded, and has no callosity. The normal color of our species 

 is uniform chestnut, but all Nassse vary very much in color. 

 As all the specimens oi N. jacksoniana seen by me were poor, 

 and thin somewhat stunted shells, it has occurred to me that 

 they were dwarfed specimens of our species, growing in un- 

 favourable circumstances, and that Tasmania is its true home. 

 In that case the species would be identical, but future observa- 

 tions must decide this. 



Cancelleria TASiiANiCA. U.S. C. t. ohlonf/a, alba, spiraUter temdter 

 Virata, liris parvis, validis, cequalibus; anfractibus 6, rotundatis, declivibus; 

 spira acuta; sutura valida; labro tenui, conspicud Urate; columella 

 abbreviato, triplicato. Long. 18^. Lat. 10. 



C. shell oblong, white, slenderly spirally lirate, with small 

 valid equal lirae ; suture valid ; outer lip thin, conspicuously 

 lirate, columella abbreviate, triplicate. 



King's Island, a white finely grooved shell, more elongate 

 than C. lcevi(/aia, and nearer in form and habit to Gould's 



