92 



minali in medio umhonata ; areis centralibus longitudinaliter 

 valde liratis, umbonibus Icevibus, elevatis, subproductis ; liga- 

 mento squammulato ; squammulis mucroiiatis, itnbi icatis, apici- 

 bus 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 pointed mucrones ; the liga- 

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

 lateral areas are four, muricated with sharp granules. 



9. Chiton versicolor, A. Adams (PI. XVI. fig. 5). C. testa 

 oblongo-ovali, elevatiuscula, rufo, albo, fiiscoque varie picta ; 

 valvis obtusis, in medio longitudinaliter sulcosis, umbonibus acutis 

 subrostratis, apicibus dejlexis ; valva terminali in medio umbo- 

 nata ; ligamento tenuiter granoso-coriaceo rufo-fusco, maculis 

 albis quinque 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 dehcately shagreened. 



November 9, 1852. 



J. S. Bowerbank, Esq., F.R.S., in the Chair. 



The following papers were read : — 



1. Descriptions of a new genus, and of several new spe- 

 cies, OF MOLLUSCA, from THE CuMINGIAN COLLECTION. 



By Arthur Adams, F.L.S. etc. 



Family Solenellidje. 



Animal oblong. Mantle open in the entire length ; margin 

 double, outer edge fimbriated ; hind outer edge ending in two cal- 

 lous conical processes immediately below the respiratory orifice. 

 Respiratory orifice continuous with the opening of the mantle, the 

 margin fringed ; anal siphon simple-edged, tubular, elongate, muscu- 

 lar, produced beyond the fringed mantle-margin which surrounds its 

 base. Gill single on each side, attached the whole length. Labial 

 palps elongate, fringed at their margins, and surrounded at their base 

 by a thin dilated membrane. Foot large, compressed, geniculate, 

 ending anteriorly in a folded ovate disc with crenate margins. 



Shell thin, not pearly within. Hinge-margin with comb-like 

 teeth. Ligament external. 



