NOTICES OF BOOKS. 



645 



Oral and side views, after West, x 750. P. chromatofhora 

 Lauterborn. Figs. 7. 8 : Side and oral views, after Brown. 

 x 1,200. 

 Lecythmm hyalinum Hertwig and Lesser. Fig. 9: Solitary 



active individual. Fig. 10: Appearance of same when deprived 

 of air. x 500. L. granulatum (Schulze) Hopkins. Fig. 11 : 

 Individual distended by ingested diatoms; from a specimen 

 stained and mounted by Dr. Penard. x 300. 



Diplophrys archcri Barker. Fig. 12 : Active solitary individual. 

 .Fig. 13: Process of tetrad division, after Hertwig and Lesser, 

 x 1,000. ' , 



