286 [Jan. 3, 



cud of Avliich is divided from the anterior end of tlie cavity by a 

 concave border one inch in extent ; the internal border of tlie in- 

 voluted convexity is also better defined than in Hal. affi/iis ; but 

 the overarching wall begins to rise close to it, divided from it only 

 by a deep and uarroAv rugged fissure instead of by a broad and 

 gently concave tract, as in JJal. defjnita. 



Both the outer and under surfaces of these specimens are more 

 rounded than in the two jireceding species ; but being more muti- 

 lated and -water-worn, the characters derivable from the external 

 parts of the bone are of less value. The characters above specitied, 

 AA'hich are furnished by the involuted convexity, are decisive as to 

 the specific distinction of the present fossils, which therefore indi- 

 cate a third species of extinct whale, which I propose to call JBaJccna 

 gibhosa. 



There is a fourth form, which difi'ers from the last in the less 

 degree of convexity of the involuted part, but more particularly in 

 its oiiter border being notched or indented, as in Balcena viysti- 

 cetus, by a vertical angular impression deeper and Avider than the 

 smaller vertical fissiuvs. 



The comparative shortness of the involuted convexity- distin- 

 guishes this species from the existing JBaliciKr and the Bal. affinis, 

 the notched and less convex involution from Hal. gibbosa, and the 

 immediate rising of the overarching wall beyond the inner bomid- 

 ary of the involution from the Bal. dcjiiilta, I propose for this 

 species the name of Bahena cmarginata. 



Januaky 3d, 1844. 



Major Thomas Austin, of Bristol, and George Harcourt, Esq., 

 M. P., of Newnham Court, Oxfordshire, were elected Fellows of this 

 Society. 



The following communications were read : — 



1. On the Occurrence of the (?e;?7/5 Physeter (or Sperm TJliale) 

 in the Red. Crag of Felixstow. By Edwakd Chaeleswoktii, 

 Esq., F. G. S. 



Some years since, Avhilst looking over a collection of fossils in the 

 possession of Mr. Brown of Stanway, I was struck by the appear- 

 ance of a cylindrical nodule from the Red Crag of Felixstow, which 

 seemed to me to exhibit indications of an organic structure unlike 

 that of any fossil body which had previously come under my notice. 

 With the permission of its owner I had a section made of this fossil ; 

 but the characters Avhicli it presented upon being cut did not en- 

 able me to arrive at any determination respecting its real nature. 



At a subsequent period, I learned from Mr. Brown tliat the 

 nodule in question had been submitted by Professor Owen to mi- 

 croscopical examination, and identified as the tooth of a Cachalot. 



