No. X: The origiu of coreless apples; The relations be- 

 tween insects and the flowers of Impatiens fulva; Apetal- 

 ism and seed propulsion in Lamium purpureum; Fruiting 

 of Robinia hispida; The vitality of seeds; Apetalism in 



Sisymbrium Thaliana 53 



Contributions to the life histories of plants, No. XI: On 

 the morphology of bractless inflorescence ; On purple- 

 leaved plants; On the origin of the apical cell; The fall of 



the leaf in the holly ; On bees and honeysuckles 162 



Mercer, H. C. Re-exploration of Hartman's Cave, near Strouds- 



burg, Pennsylvania, in 1893 96 



Merriam, Dr. C. Hart. A new subfamily of Murine Rodents— 

 the Neotominje — with descriptions of a new genus and 

 species, and a synopsis of the known forms (Plate IX) . . . 22§ 

 DescriiDtious of eight new species of Pocket Mice (genus 



Perognathus) 262 



Moore, H. F. Tanais robustus, a new species of Anisopoda 



(Plate V) 90 



Moore, J. Percy. Pterodrilus, a remarkable Discodrilid (Plate 



XIII) 449 



Ortmann, Dr. A. A new species of the Isopod-genus Bathyno- 



mus 191 



A study of the systematic and geographical distribution of 



the Decapod family Atyidpe Kingsley 397 



Pilsbry, H. A. Critical list of mollusks collected in the Potomac 



Valley (Plate I) 11 



List of Port Jackson Chitons collected by Di^ J. C. Cox, with 

 a revision of Australian Aeanthochitidte (Plates II, III, IV) 69 



Patella Kermadecensis (Plates VII, VIII) 208 



Rand, Theodore D. The Sadsbury Steatite 455 



Rhoads, Samuel N. Description of a new Armadillo, with re- 

 marks on the genus Muletia Gray Ill 



Contributions to the mammalogy of Florida 152 



A contribution to the life history of the Allegheny Cave Rat, 



Neotoma magister Baird 213 



Descriptions of four new species and two subspecies of White- 

 footed Mice from the United States and British Columbia 253 

 Descriptions of a new subgenus and new species of Arvicoline 



Rodents from British Columbia and Washington 282 



Notes on the Mammals of Monroe and Pike Counties, Penn- 

 sylvania 387 



A new Jumping Mouse from the Pacific Slope 421 



Scott, W. B. A new Insectivore from the White River Beds . . 446 



Stone, Witmer. A revision of the genus Anous 115 



A review of the Old World Rallinae 130 



