374 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



corner on each side and one or more smaller pores between these; in 

 advanced calcification the base of the ovicell is bordered by a costate 

 band and there is a small, centrally situated umbo on the top. 



The genotype, T. papulifera Canu and Bassler, was described from 

 the Pleistocene of Rustic Canyon, Santa Monica, California. The 

 present species, which may be its modern representative, agrees in all 

 important details except for the presence of the suboral umbo and avi- 

 cularium; the paired frontal avicularia of papulifera are represented 

 rarely by a single one of the same form and position. As the genus has 

 been known only as a fossil from the one locality mentioned above, it is 

 especially interesting to find a recent representative in the same general 

 region. 



Type, AHF no. 79. 



Type locality, west end of Santa Catalina Island, southern Cali- 

 fornia; a single zoarium without further data, from the Los Angeles 

 Museum. 



