540 SUMMARY OF CURRENT RESEARCHES RELATING TO 



States. The record (termed Part I.) comprises the orders Marsupiaiia, 

 Edentata, Ungulata, and Cllires ; each species' description includes not 

 only a very full structural account, often extending to internal characters, 

 but also notes on the geographical range, type-locality, habitat, and 

 habits. There is further embodied in the volume a general summary of 

 the natural history, and a list of the trees on the Mexican boundary 

 line. 



Anatomy of Notoryctes typhlops Stirling.* — Georgina Sweet con- 

 tinues her researches on this subject. In the present paper she deals 

 with the skin, hair, certain supposed tactile sense-organs upon the head 

 and other regions, and the reproductive organs. Regarding the female 

 organs in addition to the ovaries, oviducts, uteri, and vaginae proper, 

 there are described two lateral vaginal canals with vaginal c?eca and a 

 median vaginal apparatus. Like Ferameles, as far as the female sex- 

 organs can show, Notoryctes appears to be of a primitive type. 



Caucasian Hedgehogs.! — K. A. Satunin records the occurrence of 

 two hedgehogs not hitherto known in "West Transcaucasia. These are 

 described provisionally from three examples as Erinaceus pontieiis, sp. n. 

 and E. ponticus ahasaicus sub-sp. n. Within the bounds of the Caucasus 

 region there are now recorded four species or sub-species of the 

 E. europcmts L. group. 



Paraganglia of Birds.| — Wilhelm Kose gives a very full account of 

 the histology of the paraganglia-chromaiiin tissue of birds. The bulk of 

 the memoir deals with this tissue in the carotid and supra-renal organs, 

 but accounts of its presence in various other parts of the body are given. 

 An extensive series of birds is dealt with. " 



Parietal Eye of Lizards.§ — M. Nowikoff continues his account of 

 histological and experimental researches on the parietal eye of Lacerta 

 agilis and Ang wis frag His. Light effects, such as the burning of magne- 

 sium wire quite close to these animals when the lateral eyes were sealed, 

 produced no movement. But such experiments proved nothing, since 

 no response was shown when the lateral eyes were left uncovered. 

 Histological research, however, reveals the fact of pigment movements 

 adaptive to the regulation of light intensity. Further, there is an 

 analogous behaviour of the pigment in both parietal and lateral eyes. 

 These things the author regards as confirmatory of his view that the 

 parietal eye in these lizards functions in the adult stage as an organ 

 sensitive to light. 



Osteology of Ichthyosaur from the Oxford Clay.|| — C. W. Andrews 

 has gone fully into the osteology of Ophthalmosaurus icenicus Seeley, 

 and gives a summary of his results, which includes a description of the 

 skull, — remarkable for the immense relative size of the orbits, — vertebral 

 column, ribs, girdles, and limbs. There appears to be an extraordinary 

 degree of variability in the form of many of the bones, which is partly 



• Quart. Journ. Micr. Sci., li., No. 202 (1907) pp. 325-44 (2 pis. and 1 fig.). 



t Zool. Anzeig., xxxi. (1907) pp. 233-5. 



J Arch. Mikr. Auat., Ixix. (1907) pp. 563-790 (6 pis.). 



§ Biol. Centralbl., xxvii. (1907) pp. 405-14. 



II Geol. Mag., No. 515 (1907) pp. 202-8 (5 figs.). 



