36S ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



unfavorable for success, and he concludes, therefore, that 

 Trembley sometimes describes things most minutely of which 

 in reality lie has seen the least (Zoologischer A?izeiger i \o\. i., 

 ]). 77). 



The Foraminifera and Polycystiua of the North Polar Expedition, 



1875-70. 



The soundings from depths of 10 to 220 fathoms, brought 

 home by the expedition, have been examined by Mr. H. B. 

 Brady. The area is altogether new, and about half a dozen 

 species of Foraminifera may be considered as essential con- 

 stituents of the Mesozoic fauna of these high latitudes, and 

 these constitute about 95 per cent, of the entire collection. 

 They nve,Globigerina buUoides,Cassidulina kevigata,C. crassa, 

 Truncatidina lobatida, Pulvinidina karsteni, Polystomella stri- 

 atopunctata, and sometimes a few forms of Nbnionina. The 

 almost complete absence of the Milioline genera is an unex- 

 pected feature, as no approach to a full-sized mature specimen 

 has been met with in the North Polar material. Only a few 

 Jladiolaria were observed, and these, according to Professor 

 Haeckel, to whom they were submitted, appear to be identi- 

 cal with those found in the Challenger soundings in the Mid- 

 dle Pacific, at depths of 2400 to 2900 fathoms, from about 

 8 N. to 8 S. of the equator. By these soundings, our knowd- 

 edire of the sea-bottom extends to latitude 83 19' N., a dis- 

 tance of 6 49' more than half the interval between the most 

 northerly point of previous researches and the actual North 

 Pole. The facts which have been elicited appear to indicate 

 that there is no very striking diminution in the number and 

 variety of the Rhizopoda as we approach the North Pole 

 {Annals and Magazine of Natural History ', June, 1878). 



Radiolaria. 



Mr. St. George Mivart's paper on the Padiolaria, printed 

 in No. 74 of the Linuaean Society's Journal, may be commend- 

 ed to all interested in the study of these organisms. It is a 

 condensed treatise on the group. 



Multiplication of Rhizopods. 



Professor Leidy has successfully observed the mode of mul- 

 tiplication of the test-covered Khizopods,which is analogous to 



