70 BIOLOGICAL SURVEY OF 



At dredging station 19, these species were found embedded 

 to the point of invisibility in a muddy matrix surrounding 

 worm tubes, stems of Pyura ovifera, and similar objects. 

 When extracted from this matrix the great size of the indi- 

 viduals was very striking. 



Free specimens Specimens from D 19 

 H. canariensis 0.86 mm. 1.07 mm. 



Q. seminula 0.73 mm. 0.77 mm. 



Q. fusca 0.78 mm. 1.06 mm. 



The series of specimens for measurement is unfortunately 

 very small, but it indicates that the embedded individuals run 

 4 to 49 per cent larger than free specimens. It is probable 

 that the conditions of life of the former enable them to attain 

 a greater age rather than more rapid growth. 



I desire to thank Dr. Joseph A. Cushman very heartily for 

 his assistance in identifying this material and for his com- 

 ments on the nomenclature of some of the species. 



Almost all the species will be found figured in Cushman 's 

 account of the Foraminifera of the Atlantic Ocean and in 

 Cushman and Ozawa's monograph of the Polymorphinidae. 

 I give here chiefly special figures of the apertural characters 

 of some species. Flint's description of the 'Albatross' For- 

 aminifera gives excellent figures, but the nomenclature is quite 

 out of date. 



In certain genera, notably. Pyrgo, the present state of our 

 knowledge renders specific identification nearly impossible. 

 Doctor Cushman has shown me some very beautiful specimens 

 from Greenland, which, when they are described, will clear 

 up a number of these doubtful cases. 



It is evident from the fact that more than one-third of the 

 species reported here are new to the New England region 

 that much still remains to be done on our foraminiferal 

 fauna. This result seems the more striking since the material 

 is derived from only a few stations visited chiefly during the 

 last two years of the Survey's investigations, and the study 

 of the material w^as undertaken in the intervals of the investi- 

 gation of the arthropods. 



