A MONOGRAPH OF THE FORAMINIFERA OF 

 THE NORTH PACIFIC OCEAN. 



TEXTULARIID.E. 



By Joseph Augustine Cusiiman. 



Of the Boston Society of Natural History. 



INTRODUCTION. 



This second part of the work on the North Pacific Foraminii'era 

 deals entirely with the Textiilariidae, a family following in natural 

 sequence those families already considered in the first part. The 

 same arrangement of data is here followed. 



In addition to the material mentioned in the previous part there 

 has been available a considerable amount dredged by U. S. S. Tusca- 

 rora in various parts of the North Pacific. Tins consists of mounted 

 slides of Foraminifera from the various stations. It adds some 

 species and a considerable number of records of distribution for 

 many species. 



It has been found necessary to describe several new species and to 

 erect a few new genera, but the number of these has been kept as 

 small as possible. The genus Textularia, as will be noted, contains 

 several more or less distinct groups of species, but no attempt is 

 here made to give these groups generic standing. The species of 

 certain genera, such as Bulimina for example, are in an unsatisfactory 

 state, and without large series of specimens it is impossible to satis- 

 factorily delimit the various species. Figures referred to the same 

 species by different authors are often very unlike and the synonymy 

 thus becomes very difficult to work out satisfactorily. 



Reference to the figures and descriptions of types has shown the 

 necessity of separating our recent forms from the fossil species in a 

 number of cases. Where this is necessary and no names are avail- 

 able, new names have of necessity been given to the recent species. 



M<>re strikingly perhaps than in the first part the various faunal 

 areas are shown by the species of the Textulariida?. Many of the 

 species occurring in the Indo-Pacific region extend southward 



71112°— Bull. 71, pt 2— 11 1 1 



