24 MR. F. E. BEDDARD ON THE [May 2, 



I found it impossible to svibclivide the Addudor mass. 



The Semvmeiiibranosus is divided into two muscles for some way 

 in front of its obviously double insertion on to the tibia and the 

 femur. I could not find, however, that this muscle was divided 

 at its origin from the ischium. 



The Semitendinosus, as in some other, but not in all, Mustelidte, 

 has a very distinct caudal head. There is no Agitator caudce. 



The Tenuissimus is plainly present. 



The Tibialis anticus is single. 



§ Lungs. 



As Prof. Garrod pointed out in H. subam-antiaca, the lungs in 

 H. pe?'Sonata consist of four lobes on the right side and two on 

 the left. Prof. Gai-rod, however, made no observations upon the 

 relative sizes of the several lobes. On the right side the first lobe 

 is rather larger than the second ; the third is the biggest of all 

 and quite twice the size of the first ; the fourth or azygos lobe is 

 the smallest of all. 



The two lobes on the left side are more nearly equal in size, but 

 the second or lower lobe is the larger. 



§ Liver. 



The liver of this species appears to be much like that of 

 B. sttbauraQitiaca. The enormous right central lobe is deeply* 

 fissured and exposes the gall-bladder on the diaphragmatic side. 

 This lobe is quite twice the size of the left lateral lobe, which is the 

 next largest ; this lobe again is larger than the right lateral, which 

 does not show any great difference of size from either the left 

 central or the caudate. The Spigelian lobe is minute. 



§ Pancreas. 



The pancreas of Helictis is almost exactly like that of the Tayra 

 {Galictis), with which Arctoid I have specially compared it. It is 

 not clear fiom GaiTod's description what is the precise form of the 

 gland in the species investigated by himself. In R. perso7iaia 

 there is a circular portion of the pancreas running right round the 

 duodenal loop t ; this ends in a straight piece running parallel 

 with the spleen. The chief difference which Helictis shows from 

 Galictis is in the mesenterial attachment of the straight part of 

 the pancreas. In Galictis a transparent mesentery, aj)parently 

 anangious, is attached to the whole length of the straight region 

 of the pancreas, and is inserted on to the mesocolon along a 

 line which commences in front of and ends behind the left kidney. 



* But not quite so deeply as in Galictis. 



t As in many Carnivora, cf. e.g. Owen's Conip. Anat. vol. iii. p. 496. 



