Royal Society. 499 



sembles in the style of sculpture T. nniophora, Gray. The fomi of 

 the scales on the ribs at once distinguishes it, however ; the shape 

 of the shell, especially the outline of the hind slope, is also very dif- 

 ferent. 



7. Chiton inscxjlptus, A. Adams. C. testa ohlonga, valde 

 elevata, valvis terminalibus cceterarumque areis lateralihus ra- 

 diatim costatis, costis graiiatis, (/ranis transversis, subcon- 

 fertis, ad marginem obsoletis ; innbonibus carinatis ; valva ter- 



minali antice umhonata ; areis centralibus longitudinaliter valde 

 liratis ; liris obsolete rugoso-granulatis. Coccineus, areis cen- 

 tralibus lineis nigro-fuscis duabus omatis ; ligamento luteo- 

 fusco fuscoque articxdato squarmdato, squamulis l<svis, nitidis, 

 convexis. 

 Hab. New Zealand, on dead shells, deep water (Mr. Strange). 

 A beautifully sculptured species of a red colour, with two dark 

 parallel lines down the centre of the valves. 



8. Chiton muricatus, A. Adams. C. testa oblonga, in medio 

 valde elevata, nigro-fusco alboqve variegata, valvis terminalibus 

 cceterarumque areis lateralibus radiatim costatis ; costis granis 

 elevatis acutis omatis ; valva terminali in medio umbonata ; 

 areis centralibus longitudinaliter valde liratis, umbonibus Icevi- 

 bus, elevatis, subproductis ; ligamento squamulato ; squainulis 

 mucronatis, imbricatis, apicibus suberectis. 



Hab. Sydney, under stones, low water (Mr. Strange). 



This species is remarkable for the somewhat triangular imbricate 

 scales of the ligament ending in sharp pointe4 mucrones ; the liga- 

 ment is tessellated with pale fuscous and dark brown ; the ribs on the 

 lateral areas are four, muricated with sharp granules. 



9. Chiton versicolor, A. x\dams. C. testa oblotigo-ovali, ele- 

 vatiuscula, rufo, albo, fuscoque varie picta ; valvis obtusis, in 

 medio longitudinaliter silicosis, lanbonibus acutis subrostratis, 

 apicibus dejlexis ; valva terminali in medio umbonata ; liga- 

 viento tenuiter granoso-coriaceo rvfo-fusco, maculis albis quiu' 

 que ornato. 



Hab. Sydney, under stones, low water (Mr. Strange). 



A prettily variegated species, with the scales on the ligament mi- 

 nute, imbedded and not imbricate, and the entire upper surface of 

 the valves delicately shagreened. 



ROYAL SOCIETY. 

 March 2, 1854.— Professor Graham, V.P., in the Chair. 



1. "On the Growth of Land Shells." By E. J. Lowe, Esq., 

 F.G.S., F.R.A.S. &c. 



Perhaps the following observations on the growth of land shells 

 may contain sufficient information to prove interesting to the Royal 

 Society. Before describing them, however, a few introductory re- 

 marks will be necessary. Every individual experimented upon has 



32* 



