184 



The Biological Society of Washington. 



Obeliscus 2 



ventricosus 



Obtortio 1- 



Oceanida . *' 



gradata 



Oda 12 



Odetta 12 



callipyrga 1* 



. '. 4, 9, 13 

 . 12, 16 

 . 12 



elegans 



Odostoima . . . 

 americana 

 callipyrga 



conspicua . 



dolioformis 



fenestrata 



jeffreysiana 



nitens 



pilsbryi 



rissoidea 



rissoidea . 

 turricula 

 Odostomiella 



10 



... .12 

 . 10, 15 



13 



11 



10 



Oldys, H. VV. The use of our musical 



scale by birds viii 



Some new bird songs .... x 



Onychomys albescens 124 



canus 



tularensis 



yakiensis 



124 

 128 



12-1 

 42 

 C> 



Onychopterus 

 Orina pinguicula 



Orinella 



Osgood, W. H. The caribou of Alaska viii 



- Haplomylomys, a new subgenus 



of Peromyscus 53-54 



- Thirty new mice of the genus 

 Peromyscus from Mexico and Gua 

 temala 55-78 



Two new pocket mice of the 



genus Perognathus 127-128 



Otopleura 5 



Palmer, Wm. Gyrostachys simplex in 



Virginia 165 



Parthenia armata 11 



diadema 11 



Parthenina 10 



Parthenope 170 



Parus wollweberi 26 



Pedicularis gray! 100 



procera .... 

 Pelexia setacea . . . 

 Pentstemon formosus 



glaber . 



kennedvi 



llus 



100 

 116 

 100 

 97 

 97 

 100 



pulchel] 



puniceus KH) 



roezli 97 



superbus 100 



violaceus 96 



Peristichia . 9 



toreta 9 



Perodipus cabezonee 144 



goldmani 143 



ingens ... 141 



levipes 145 



microps 145 



montanus 140 



simulans 144 



tularensis 143 



utahensis .... 143 



venustus 142 



Perognathus perniger 127 



ochrus 128 



Peromyscus allex 76 



allophylus ] 71 



Peromyscus altilaneus 74 



amplus 62 



angelensis B 



badius 70 



bullatus 



castaneus . 



consobrinus 



evides 



eremicoides 



eremicus 



fulvus 



gentilis 



goldmani 



lophurus 



melanocarpus 



mesomelas 



nigrescens 



pectoralis 



phseurus 



polius 



simulatus 



simulus 



teapensis 



vicinior 



xenurus 



zamelas 



/amora- 



zelotes 



Phacelia monosperma . - 

 Pharcidella 



folinii 



Pinnaxodes meinerti . . - 

 Pitangus derbianus .... 

 Pleurogyne fontana .... 

 Pocket gophers, a study of 



Porzana goldmani 



Pseudorissoina 



Ptycheulimella 



Pyramidella 



auricoma 4 



auris-cati 5 



clandestina 6 



cossmani 5 



dodona 6. 14 



4 



162 



26 



177 



vii 



151 



, 13 



3,4 



jamaicensis . . . 



nitidula 



paumotensis . . . 



punctata . . . . 



pyramidata . . . 



subulata 



Pyramidellidse . . . . 

 Pyrgisculus ...... 



Pyrgiscus 



Pyrgolampros ... 



mioperplicatulus 

 Pyrgolidium . . . . 



roseum . . . . 

 Pyrgulina 



Quaking aspen, scars on viii, x 



Rathbun, M. J. A preoccupied crab 

 name 102 



Descriptions of three new spe 

 cies of American crate . . . .161-162 



Some changes in crustacean 



nomenclature 169-172 



Ridgway, Robt. Nannorchilus, new 

 name for Hemiura, preoccupied . . 102 



Rissoa doliatum 10 



pyrrhacme 14 



Rissoella eburnea 14 



Rose, J! N. Revision of N. A. Crassul- 

 acese . . . .viii 



