Ph3^siologie. — Palaeontologie. 117 



schnell; das Optimum sinkt von 55° auf 27° während der Laubent- 

 faltung; schwach saure Lösung wird bevorzugt. 



Die Alkoholfällung und das aseptische Aufbewahren erschwä- 

 chen alle diesen Chymasen. Ricinus- und Pircunialab geben mit 

 Peptonlösungen Plasteinfällungen und bringen Eiweiss beinahe 

 momentan zur Gerinnung. E. Pantanelli. 



Grazia, S. de Lupino e calce. (Staz. sperim. agrarie. XL. 

 p. 351—370. 1907.) 



Lupine wird von der Alkalität des kohlensauren Kalkes geschä- 

 digt; trotzdem konnte in vesuvianischen Urböden der Zusatz klei- 

 ner Mengen Kalk oder Gips Ertragsteigerung bewirken. Ueber 6 dz 

 pro ha darf man aber im besten Falle nicht streuen. Gips wirkte 

 schädlicher als Kalk. E. Pantanelli. 



HoUiek, A., Description of a new tertiary fossil flower from 

 Florissant, Colorado. (Torreya VII. p. 182—184. 1907.) 



A choripetalous flower, Phenanthera petalifera , is described and 

 figured from the Tertiary shales of Florissant. Theiauthor is of the 

 opinion that the fossil is referable to the family Caryophyllaceae or 

 to the Orders Rosales or Myrtales. Berry. 



Jeffrey, E. C, Araucariopitys , a new genus of Avaucavians. (Bot. 

 Gaz. XLIV. p. 435—444. pl. 28-30. 1907.) 



The author describes twigs showing structure as Araucariopitys 

 americana from the Cretaceous deposits ofKreischerville, Staten 

 Island. This species is characterized by deciduous shoots, radially 

 pitted tracheids, by rays which diverge from the araucarian type 

 and approach the abietineous type and by the formation of trau- 

 matic resin canals approximating those found in the Abietineae. 

 These remains are associated with leaf impressions of Csekanowskia 

 which has usually been regarded as related to the Ginkgoales but 

 which the author is inclined to think is really the foliage of Arau- 

 cariopitys. The author takes occasion to reiterate his belief in the 

 greater antiquity of the Abietineae among modern Coniferales and 

 says that the evidence of the derivation of the Araucarineae from the 

 Abietineae in the early Mesozoic is rapidly acumulating. Berry. 



Knowlton, F. H., Description of a collection of Kootanie 

 plants from the Great Falls Goal Field of Montana. (Smith- 

 sonian misc. Coli. L. p. 105—127. pl. 11—14. 1907.) 



The collection upon which this contribution is based includes 

 24 species of Lower Cretaceous plants of which new species are 

 described in the genera Cladophlebis , Acrostichopteris , Dryopteris, 

 Adiantum , Oleandra and Protorhipis This brings the known Kootanie 

 flora up to between 90 and 100 species. The Dipteracean genus Pro- 

 torhipis at one time thought to be a "pro-Angiosperm" is recorded 

 from North America for the first time. . Berry. 



Macbride, Th. H., On certain fossil plant remains in the 

 Iowa Herbarium. (Proc, Davenport Acad. Sc. X. p. 153 — 162. 

 pl. 1-12. 1907.) 



The author discusses certain Paleozoic and Pleistocene plant 



