126 



carinas versus urcuato, in canali altd snperne desinente, intus sub- 

 striato, pallide cameo ; spird mediocri : long. 2-g^, hit. 2^ poll. 

 Hob. ad portum Sanctae Elenae in fissuiis rupiuni. 

 This fine species, of which but very itw were found by Mr. Cuming, 

 has the upper carination very much developed, the tubercles being 

 highly elevated and wavy, and thickly set with deeply imbricated fo- 

 liations. On the next carination, these characters are less strongly 

 marked ; and on the two last, the tubercles almost entirely disappear. 

 The ridge formed by the basal canal is very prominent. — W. J. B, 



Genus Pkctunculus. 

 Pectuncultjs maculatus. Pect. testd orUculatd, suhatiritd, sub- 

 cequilaterd, convexd, albente castaneo-maculosd, striis radiantibvs 

 subdecussatis creberrimis ; intiis albd, marcjinihis crenatis ; epi- 

 dermide fused, viUosd : long. 2|, alt. 2|-, lat. l^ poll. 

 Hab. in Porta Portrero. 



The spots vary in different individuals ; but the colouring matter 

 appears to be very sparingly secreted as the animal advances in age, 

 while in very young specimens it greatly predominates. The shell 

 rapidly increases in convexity as it becomes older : when very young, 

 it is comparatively lenticular. Found in fine gravel in eleven fathoms 

 water.— W. J. B.' 



Pectunculus ovatus. Pect. testd obovatd, convexd, glabrd, lineis 

 transversis minntissimis, albente, umbonibus castaneo pallide nota- 

 tis; intus albd, marginibus crenatis; epidermide subvillosd : long. 

 \l, uU. 2, lat. Hpoll. 



Hab. ad insulam Lobos. 



Found in coarse sand at the depth of seventeen fathoms. — W. J.B, 



Pkctunculus iNTERMEDius. Pcct. tcstd suborbictilatd, siibglabrd, 

 subdepressd ,albidd, castaneo vmbones versus pallide zonato-radiatdi 

 striis radiantibus subdistantibus, decussatis ; intiis albd, margini- 

 bus crenatis; epiderrnide sitbpilosd : long, 1 1, lat. 1%, alt. l^V 

 poll. 

 Hab. ad Iquiqui. 



In many specimens the pale chestnut radiating zones near the nm- 

 hones are eft'uced by decomposition. Found in coarse sand at a depth 

 of ten fathoms. — W. J. B. 



At the request of the Chairman, Mr. Spooner read the following 

 Notes of the post mortem examination of the Dromedary , Camelus 

 Dromedarius, Linn., which lately died at the Society's Gardens. 



"On the cavity of the abdomen being laid open, several gallons of 

 serum escaped, intermixed with a large portion of coagulable lymph, 

 which, on a further investigation, appeared to have flowed from the 

 liver. This Di5C2/s was constituted ot one main lobe, having several 

 small lobull extending from its posterior edge, by means of which it 

 became attached to the right kidney : it was confined to the right 

 .side of the spine. The posterior vena cava passed through its sub" 

 stance previou.sly to piercing the diaphragm, situated to the right 

 side of which vein was the vena porta: There was no gall-bladder: 



