103 



18. Cardita Sowerbyi, Desh. C. testa ovato-transversa, valde 

 iiKequilaterali, crassa, solida, tumida, suhcuneiformi, alba vel Jla- 

 vicante, rufo aliquantisper maculata, iiitiis Candida ; latere antico 

 brevissimo, postico obtuso ; sexdecim costata ; costis latis, con- 

 veris, incequalibus , medianis latioribus, tubercuUs irregularibus 

 exasperatis, in latere superiore tribus quatuorve angustioribus ; 

 lunula lata, cordiformi, profundissima. 



Var. /3. Testa minore, roseo-fiavicante tincta, lunula paulo minore. 

 Hah. Swan River, W. Australia. Coll. Cuming. 



19. Cardita QuoYi, Desh. C. testa ovato-transversa, subcequi- 

 laterali, turgida, utroque latere obtusa, rotundata, longitudinaliter 

 costata; costis quatuor et viginti, latis, convexiusculis, postice an- 

 gustioribus, multo latioribus quam interstitiis, squamis brevissimis, 

 obtusis, numerosis, asperatis, posticis eminent ioribus ; umbonibus 

 minimis, oppositis ; lunula minima, profunda, cordata ; valvis 

 intus albo-roseis ; impressione musculari postica fuscescente. 



Cardita Australis, Quoy ^ Gaim. Voy. de VAstr. pi. 80. f. 4 (uou 

 Lamk.) . 



Hah. New Holland. Coll. Cuming. 



20. Cardita difficilis, Desh. (PI. XVII. fig. 16, 17.) C. testa 

 ovato-transversa, inaquilaterali, tumida, solida, ad inargines con- 

 vexiuscula, alba,, sub epidermide squalide fuscescente immaculata, 

 radiatim costata ; umbonibus obliquis, oppositis ,• lunula parvissima 

 profunda, Icevigata, plana ; costis subangulatis, squamoso-crenatis, 

 asperis, pracipue ad umbones et in latere postico ; interstitiis cos- 

 tulas subcequantibus ; valvis intus candidissimis ; cardine angusto. 



Hah. New Zealand. Coll. Cuming. 



December 14, 1852. 



Dr. Gray, F.R.S., Vice-President, in the Chair. 



The following papers were read : — 



1. Notes on the Anatomy of the Tree-Kangaroo 



(Dendrolagus inustus, Gould). 



By Professor Owen, F.R.S., V.P.Z.S., etc. 



The specimen of the above rare species, the first that had been 

 exhibited alive in Europe, was a full-grown and somewhat aged 

 female, having lived in the Society's Menagerie since the 8th of Oc- 

 tober, 1848. It had suffered from a disease in the tail, for which 

 more than half of that organ had been amputated, and the stump 

 was well-healed. I am not aware what symptoms preceded the ani- 

 mal's death, which took place on the 13th of October, 1852; the 



