INDEX. 



555 



Mcntzelia Brandcgei, 3G7. 

 iuvolucrata, 367. 

 tricuspis, 307. 



Metaiiiorpliic rocks, ISO. 



Meters, exaniiuatioai of, 379. 



Mexican borders, new genera of Ari- 

 zona, California, and tlieir, and 

 two additional Asclepiadaceai, 

 290. 



Microlabis Sternbergi, Corda, 14, 52. 



Microseris Howcllii, 300. 



Micronla, Beuth., 2(31. 



Mimulus exiguus, 307. 

 Rattani, 307. 



Moltkia (e(crulea), Lehm., 257. 



Morphology of the leech, external, 

 the, 76. 



Nama depressum, Lemmon, 30-4. 



Hayardi, 304. 



pusillum, Lemmon, 305. 

 Kebula of Orion, a photographic 



study of the, 407. 

 Neuroptera, 167. 



O. 



(Enothera arboroa, 307. 



Havardi, 366. 

 Oinphalodes, Tourn., 259, 262. 



aUena, Gray, 262. 



cardiophylla, Gray, 263. 



Howardi, 263. 



nana, 263. 

 var. aretioides, 263. 

 var. Chamissonis, 263. 



rupestris, 264. 



Schrenkii, 264. 



villosa, 264. 

 Opiliones, 13. 



Orion, a photographic study of the 

 Nebula of, 407. 



tables, 408-416. 

 Oniithogaluin Leichtlinii, Baker, 376. 

 Oxytheca inermis, Watson, 370. 

 Oxytropis, DC, 1. 



arctica, 11. Br., 4. 



campestris, L., 6. 

 var. cserulea, Koch, 6. 



deflexa, DC., 1. 



Lagophus, jMutt., 2. 



Oxytropis Lambcrti, Pursh, G. 



var. Bigelovii, 7. 



var. scricea, 7. 

 Icucantha, Pers., 5. 

 Merteusiana, Turcz., 4. 

 monticola, 6. 

 multice])s, Nutt., 2. 



var. minor, 2. 

 nana, Nutt., 2. 

 nigrescens, Fischer, 3. 



var. aretobia, 3. 

 oreophila, 3. 

 Parry i, 4. 



podocarpa. Gray, 3. 

 splendens, Dougl., 7. 

 viscida, Nutt., 5. 

 Oxytropis, DC, a revision of the 



North American species of the 



genus, 1. 



Packard, Alpheus Spring, notice of, 



522. 

 Palaranea, Fritsch, 22. 



borassifolia, Fritsch, 22. 

 Paleozoic Arachnida, a contribution to 



our knowledge of, 13. 

 Paleozoic rocks of Sweden, tabular 

 view of the lower, 239. 

 of Norway, 240. 

 Paolia, Smith,"lG8, 172. 

 Gurleyi, 173. 

 Lacoana, 173. 

 superba, 173. 

 vetusta. Smith, 173. 

 Paracaryuni, 258. 

 Pattison, Mark, notice of, 539. 

 Pedicularis Howellii, 307. 

 Pedipalpi, Latreillc, 19. 

 Pelagic fish eggs, on the development 

 of some, 23. 

 blastodisc and periblast, 42. 

 blastodisc, the growth of the, at 

 the expense of the periblast, 

 46. 

 cleavage, 41. 

 cleavage-cavity, the, 63. 

 cleavage, irrcgularilics of, 59. 

 cleavage phenomena, other, 60. 

 cleavage-planes, the order and 



direction of, 57. 

 cleavage, the velocity of, 45. 

 embryo, the formation of the, 

 73. 



