388 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



a Straight proximal border, the peristome low and smooth with 4 or 5 

 small spines (often entirely wanting). The ascopore is semicircular, 

 like that in most species of Microporellaj but is situated farther proxi- 

 mally so that there some tremopores between it and the aperture. 



The ovicell is large and prominent, perforated and with a row of 

 conspicuous areolae around the base. 



It apparently occurs around the world in tropical and temperate 

 waters. Hincks and O'Donoghue recorded it from British Columbia; 

 Robertson from La Jolla and Catalina Island, southern California; and 

 Canu and Bassler from the Pleistocene of southern California. 



The Hancock collections extend the range southward to the Gala- 

 pagos where it was dredged at Charles, Wenman and Albemarle Islands. 

 At intermediate points it was found at Clarion Island, west of Mexico 

 and at several stations within the Gulf of Mexico. It is common about 

 the Channel Islands off the coast of southern California and northward 

 to Oregon. Depth 3 to more than 100 fms. 



Fenestrulina malusi var. umbonata O'Donoghue, 1926 



This variety is characterized especially by the presence of a con- 

 spicuous umbonate process immediately proximal to the ascopore. The 

 measurements are somewhat larger than in the typical form, averaging 

 0.70 mm long by 0.60 mm wide in our specim.ens, and the aperture is 

 correspondingly larger. Otherwise there appears to be no essential dif- 

 ference, and there is some intergradation. 



O'Donoghue described the variety from the San Juan Islands, Puget 

 Sound and from Bentinck Island, and Hincks had already noted its 

 occurrence, without naming it, in the Queen Charlotte Islands. 



Hancock Station 1325-41, oi? Santa Catalina Island, southern Cali- 

 fornia, 59 fms. Also from Cadboro Bay, Victoria, British Columbia, 

 G. E. MacGinitie, collector. 



