25 



form common at Bordeaux. Our shell is however thicker, and 

 the four plaits on the columella show its distinctness, though it 

 adds one more to the many instances of mimetism, that is to 

 say, forms, which seem closely approximate to types in contem- 

 porary European beds. This is especially seen in the volutes, 

 which Professor M'Coy was the first to point out in describing 

 Voluta antiscalaris. The only living form at all near it is 

 V. Jlavicans Gmelin, which is Australian. 



Lyonsia Agnewi U.S. L. testa ovato-transversa, incequilateralis, 

 convexa, concentrice striata et sulcata; latere ^Jostico attenuato' 

 rotundato, antico oblique producto, latiore, aperte antice et 

 postice hiante. Long. 82. Lat. 1. 44. 



L. shell transversely ovate, inequilateral, somewhat solid, 

 convex concentrically striate and sulcate,posteriorly attenuately 

 rounded, exterior obliquely produced, broader, gaping at both 

 ends. 



This fossil I have dedicated to Dr. Agnew, secretary of the 

 Society, to whose indefatigable labours the flourishing state of 

 the Society is owing. 



SoLECURTUS Legkandi d.s. S. testtt poUta, ohlonga, incequila- 

 tcralis, latere postico elongato, utrimqiie sultruncato, hiante, 

 medio et postice ohlique sulcata, siilcis lorope marginem dorsalem 

 retrosim angulatis. Long, 44. Lat. 19. 



S. shell polished oblong inequilateral, prolonged posteriorly, 

 subtruncate at both ends, gaping, obliquely grooved, grooves 

 angularly turned back near the dorsal margin and radiating 

 from the umbones towards the margin. 



This fossil is very near to the Solecurtus Australis of Dunker, 

 which now inhabits N. Australia ; it is, however, smaller. 

 Traces of the pink color of the shell are plainly visible. I 

 have dedicated the species to Mr. W. Legrand, of Hobart 

 Town, the learned conchologist, whose most painstaking 

 enquiries into our living molluscan fauna have resulted in his 

 monograph of Tasmanian land shells, besides many additions 

 to the marine fauna. I have also thankfully to acknowledge 

 the assistance I have received from him in preparing this list. 



Ceassatella oblonga, n.s. C. testa ovato-transversa, incequi- 

 lateralis, crassissima,convexa,transversim sulcata,sulcis posteriori- 

 bus tenuihus, latere postico angulato, sinuato. Long. 93. Lat. 67. 



C. ovato trigonal, inequilateral, very convex, obliquely 

 truncate behind, closely concentrically ribbed, the ribs becom- 

 ing fine striae on the posterior flattened portion, hinge large 

 thick, lunule impressed, with a distinct ridge from the umbo 

 to the base of the truncated flattened posterior margin. 



This shell which is very distinct from any existing species, 

 and very large, is somewhat similar in form to C. attenuata, 



