Jifiscenaricou.f. 295 



never been reopened since they were first closed by the materials 

 introduced into tlieiu by the river, and that all the contained fossils 

 belonj; to one and the same geological period. lie points to the 

 discovery of species not before found in Pleistocene beds as only a 

 repetition of what has occurred in other sections he has worked, 

 and remarks also that the increase of species is corroborative of a 

 suggestion of Mr. C. Keid that the more wo discover of the smaller 

 creatures of this and the preceding age, the more they a])pro.\imate to 

 those of our own times. Even if we were to exclude from tlio lists 

 all the species not previously found fossil elsewhere, we still have 

 an extensive assemblage of the older Pleistocene forms, which 

 must have lived during the filling of the fissures, and this there- 

 fore fixes the filling operation as having occurred in Pleistoceno 

 times. 



2. ' The Vertebrate Fauna collected by 'Sir. Lewis Al)bott from 

 the Fissure near Ightluun, Kent.' By E. T. IS'owton, Esq., F.ll.S., 

 F.G.S. 



The vertebrate remains collected by Mr. Lewis Abbott are 

 passed in review, and as far as possible specifically identified : they 

 represent mammals, birds, reptiles, and amphibians ; but no fishes 

 have been found. In all, 48 different forms have been recognized ; 

 vi or perhaps 4 are extinct ; 11 are extinct in Britain, but are still 

 living elsewhere ; 21 are living in Britain, but are known to bo 

 Pleistocene or Forest-bed forms ; and 12 are species now living in 

 Britain which have not hitherto been recognized in Pleistocene or 

 older deposits. 



Among the more important species found in this fissure, but 

 extinct in Britain, may be noticed, besides Elephas prmngenius, 

 lihinoceros antiquitatls, and Ifyiena, the Ursus arctos, Cam's laqopus, 

 Myodes torquatvs, Myodes Ummus, Microtvs grer/alis, M. raiticeps, 

 Laynmys pusillus^ Spermophilus, and Cervus tarandus. The name 

 of Mustda rohvsta is proposed for some limb-bones intermediate 

 between the Polecat and ifarten, and the remains of an extremely 

 Bmall Weasel are noticed as a variety of Mustda valgaris. Although 

 the large number of living species gives a recent aspect to this series 

 of remains, the evidence, it is believed, points rather to their being 

 all of Pleistocene age, and most nearly allied to the fauna of British 

 caves. 



MISCELLAXEOUS. 



On the EmhryoJoyy of the Cumacea. 

 By P. BTjTscniNSKY, of the University of Odessa. 



The segmentation of the ova in Iphinoe maotica, Sowin., is of 

 the centro-lecithal type. All the segmentation-nuclei, which in the 

 centre of the ovum are surrounded by radiating aggregations of 



