THE TRANSACTIONS OP THE LI^NEAN SOCIETY. 193 



groups, according as they afiect the classes of the animal kingdom. 

 To these they bear the following proportion — 



Astomatoits Protozoa .... 1 



Rotifers 1 



Scolecids 1 



Annelids 2 



Crustaceans 3 



Insects 4 



LaniellibrancJis 1 



Piilmo-gasteropods 1 



PrancMo-gasteropods .... 1 



Other classes (about 1(3) . . 



— or one paper on Khizopods, four on 'Woi'ms, seven on Arthro- 

 pods, and three on Molluscs : in all fifteen papers, representing nine 

 of the twenty-five ' classes' of animals. 



Mr. Brady, in his Essay ' On the Ehizopodal Fauna of the 

 Shetlands,' demonstrates an evident affinity between the Foramini- 

 fera of this district and those of the opposite Norwegian coast. 

 He also, we think rightly, inchnes to the opinion that the Grulf- 

 stream has Little or no direct influence on the animal population of 

 these northern shores. And, in common with Mr. Jeff'reys, he 

 questions the hona fide occurrence of Peneroplis and Vertehralina 

 (Mediterranean and tropical forms) in such high latitudes. Mr. 

 Brady has met with all the species figured in Williamson's Mono- 

 graph, with the exception of ten (of which about half are doubtftd) . 

 In a useful table he records the relative frequency of these forms 

 and the depths at which they were obtained, adding references to 

 "Williamson's figures and to the nomenclature of other writers. The 

 study of the minor modifications of type presented by the Foramini- 

 fera, in relation to the external conditions under which they occur, 

 discloses an almost unworked subject of great interest. We are 

 glad to find our author bearing practical testimony to the truth of 

 the "views advocated in Dr. Carpenter's work;* and the easy way 

 " in which the various members of the group faU into their places 

 " when treated with reference to this system." 



New facts of undoubted value are brought forward by Dr. Moxon 



• Koticcd in N. II. R. July, 1S63, \x 323. 



