138 MisGellaiieoas. 



of the latter from the former as a group of Gymnosperms, as sug- 

 gested by M. Brongniart, must be abandoned. The remarkable 

 development of exogenous woody structures in most members of 

 the entire family indicates the necessity of ceasing to apply either 

 to them or to their living representatives the term Acrogenous. 

 Hence the author proposes a division of the vascular Cryptogams 

 into an exogenous group, containing LycopodiacecBy Equisetacece, 

 and the fossil Calamitacece, and an endogenous group, containing 

 the ferns, — the former uniting the Cryptogams with the Exogens 

 through the Gi/cadece and other Gymnosperms, and the latter link- 

 ing them with the Endogens through the Palmacece. 



MISCELLANEOUS. 



On tlie Shulls of Manidse. 



(In a letter to Dr. J. E. Gray.) 



Dear Sik, — In the ' Annals and Magazine of Natural History ' 

 for last month I observe a note of yours '' On the Malar Bone in the 

 Skulls of Manidae ;" and, as bearing on the explanation you offer 

 regarding the absence of a zygomatic arch in most of the skulls you 

 have seen, I beg to say that in the skeleton of a very young Manis, 

 from Western Africa, contained in the Haslar Museum, the arch is 

 formed by a thin band of cartilage connecting the zygomatic pro- 

 cesses on the maxilla and squamosal. 



I am, dear Sir, 

 K. N, Hospital, Haslar. Yours truly, 



July 3, 1871. Chables Baeeon. 



On the Develo^yment of the Teeth in Phacochoerus sethiopicus. 

 By Dr. J. E. Geat, F.E.S. &c. 



The British Museum has lately received the skulls of two young 

 Phacochoerus cetliiopiciis from Abyssinia. These skulls can scarcely 

 be distinguished from those of the genus Sus by their dentition, as 

 the grinders are not worn, and the large permanent grinder is not 

 developed, but are known by the dilatation and the spreading out 

 of the hinder part of the base of the lower jaw. The younger, 

 •which is 4| inches long, has only the second deciduous grinder de- 

 veloped in the upper jaw and the first and second in the lower jaw. 

 The canines are slender and conical, curved downwards and out- 

 tvards. The pulp of the two upper cutting-teeth is visible ; but they 

 are not cut. The canines of the lower jaw are slender ; and the 

 outer cutting-teeth are alone visible. 



The larger skuU, which is Q\ inches long, has the small conical 

 first and the second and third larger deciduous molars well developed, 

 as are also the two upper cutting-teeth ; and the canines are, like 

 those of the smaller skull, bent down, but the alveolar part of the 



