REVIEWS. 283 



Jaw of Mole (PI. XX., Fig. 2). — In the slides which consist 

 of half of the lower jaw of the Mole there will be seen four 

 incisors, one canine, and six grinders, the first three of these 

 latter being small and conical. The food of this animal consists 

 chiefly of earthworms. For a description of the structure of teeth 

 refer to Carpenter's work on " The Microscope and its Revela- 

 tions." W. C. Tait. 



Jaw of Mole. — I enclose a sketch of one of the molars of the 

 mole, showing what I think to be the cementum intervening 

 between the dentine and the jaw-bone. When seen under the 

 polariscope, this seems to show a distinct layer well defined on 

 both sides, but besides surrounding the root of the tooth it 

 appears to reach from one tooth to another, joining the whole set 

 together. Is this the case, or am I mistaking a portion of the 

 bone for cementum ? F. E. Robinson. 



EXPLANATION OF PLATES XIX. & XX. 





• Plate XIX. 



Fig. 1. — Coccus cataphractus, upper side. 



2. — Ditto, underside, 



3.— Egg of ditto. Drawn by Dr. C. F. George. 



4. — Unopened eyelids of Kitten : a, meibomian glands ; b, inner 

 surface of eyelid ; c, bulbs of eyelashes. Drawn by A. H. 

 Searle. 



Plate XX. 



Fig. 1. — Section of Piper. Drawn by A. Hammond. 



2. — Section Molar Tooth of Mole, showing a, enamel ; h, dentine ; 

 c, pulp cavities ; d, cementum ; e, bone. Drawn by F. R. 

 Robinson. 



)> 



1Review0. 



Die Naturlichen Pflanzenfamilien. Von A. Engler und 

 K. Prantl. Parts 44 — 48. (Leipzig : Wilhelm Engelmann. London : 

 Williams and Norgate.) 



These parts contain Euphorbracese, Myrsenace^, Primulaceae, and Plum- 

 baginaceje, by F. Pax ; Sapotaceae, by A. Engler ; Choetophcraceae, Mycoi- 

 deace^e, CylindrocapsaccEe, Oedogoniacese, Coleochoetacece, Cladophoraceae, 

 Gomontiaceae, Shceropleaceae, Botrydiaceae, Phyllosiphonaceae, Bryopsidaceae, 

 Derbesiaceae, Vaucheriaceae, Caulerpaceae and Codiaceae, by N. Wille ; Gerani- 

 aceae, Oxalidaceae, Tropaeolaceae, Linaceae, Humiriaceae, and Erythroxylacece, 

 by K. Reiche ; Compositee, by O. Ploffmam ; and Malpighiaceae, by F. 

 Neidenzu. 



These five parts contain 147 illustrations, composed of 846 figures. The 

 figures are beautifully engraved. 



