126 



carinas versus arcuato, in canali altd superne desinente, hit us sub- 

 striato, pallide cameo ; spird mediocri : long. 2£, lat. 2i poll. 

 Hab. ad portum Sanctse Elense in fissuris rupium. 

 This fine species, of which but very few 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 j and on the two last, the tubercles almost entirely disappear. 

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



Genus Pectunculus. 

 Pectunculus maculatus. Pect. testd orbiculatd, subauritd, sub- 

 (equilaterd, convexd, albente castaneo -maculosa, striis radiantibus 

 subdecussatis creberrimis ; intus albd, marginibus crenatis ; epi- 

 dermide fused, villosd : long. 2|-, alt. 2|-, lat. 1% poll. 

 Hab. in Portu Portrero. 



The spots vary in different individuals j 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 minutissimis, albente, umbonibus castaneo pallide nota- 



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



If, alt. 2, lat. 1% poll. 



Hab. ad insulam Lobos. 



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



Pectunculus intermedins. Pect. testd suborbiculatd, subglabrd, 

 subdepressd,albidd, castaneo umbones versus pallide zonato-radiatd ; 

 striis radiantibus subdistantibus, decussatis ; intus albd, margini- 

 bus crenatis; epidermide subpilosd : long. \\, lat. \\, alt. 1 T V 

 poll. 

 Hab. ad Iquiqui. 



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

 bones are effaced 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 viscus was constituted of one main lobe, having several 

 small lobuli 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 previously to piercing the diaphragm, situated to the right 

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



