98 THE AMERICAN MONTHLY [Marcli 



Radiolaria: A New Species. 



EEV. FEED'K B. CAETER, 



MONTCLAIB, N. J- 



Astractura digitata, n. sp. 

 Phacoid shell twice as broad as the medullary shell, 

 with seven pores on its radius, without chambered ring. 

 Arms finger-shaped, about as long as broad at the base, 



at the rounded distal end about three-fourths as broad. 



Dimensio7is. — Diameter of the phacoid shell 0.11, of 

 the medullary shell 0.055 ; length of the arms 0.06, basal 

 breadth 0.056, distal breadth 0.046. 



Habitat. — Fossil in the rocks of Barbados. 



Appendicitis. — P. Blakiston, Son & Co., of Philadelphia, 

 announce a book on "'Appendicitis," by John B. Deaver, M. D., 

 Assistant Professor of applied Anatomy, University of Pennsyl- 

 vania; Assistant Surgeon to the German Hospital, etc. The 

 book will be arranged in a practical and systematic manner. 

 The History, Etiology, Symptoms, Diagnosis, Operative Treat- 

 ment, Prognosis, and Complications of this disease will be given 

 in the order named. It Avill contain about forty illustrations 

 of methods of procedure in operating, and typical pathological 

 conditions of the Appendix, the latter being printed in colors. 



