254 University of California Publications in Zoology. [Vol.4 



this coast, the remainder being cosmopolitan or circumpolar. Of 

 the whole number of Chilostomata so far reported from our col- 

 lection, seventy-nine species and four sub-species are recognized. 

 Of these, nineteen species and two sub-species are new, while 

 thirty-eight species and two sub-species are known only from this 

 region. An interesting fact disclosed is the relationship existing 

 between a cyphonautes, a larval bryozoan form frequently met 

 with, and Memhranipora villosa, a species rather abundant on the 

 Pacific Coast. 



LIST OF SPECIES TEEATED. 



Memhranipora circumclathrata 



Hincks. 

 Memhranipora horrida Hincks. 

 Memhranipora lacroixi Audouin. 

 Memhranipora occultata sp. nov. 

 Memhranipora patula Hincks. 

 Memhranipora sandalia Eobertson. 

 Memhranipora spinifera Johnston. 

 Memhranipora tehuelcha 



d 'Orbigny. 

 Memhranipora memhranacea 



Linnaeus. 

 Memhranipora serrata Hincks. 

 Memhranipora villosa Hincks. 

 Cyphonautes occidentalis sp. nov. 

 Micropora coriacea Esper. 

 Tlialamoporella rosieri Audouin. 

 Crihrilina hippocrepis Hincks. 

 Microporella calif ornica Busk. 

 Microporella malusi Audouin. 

 Lagenipora spinulosa Hincks. 

 Schizoporella areolata Busk. 

 Schisoporella auriculata Hassall. 

 Schizoporella auriculata subsp. 



ochracea Hincks. 

 Schizoporella hiaperta Michelin. 

 Schizoporella cecili Audouin. 

 Schizoporella hyalina Linnaeus. 



Schizoporella insculpta Hincks. 

 Scliizoporella linearis Hassall, 



subsp. inarmata Hincks. ■ 

 Schisoporella longirostrata Hincks. 

 Schizoporella oligopus sp. nov. 

 Schizoporella tumulosa Hincks. 

 Myriozoum crustaceum Smitt. 

 Myriozoum coarctatum Sars. 

 Myriozoum suhgracile d 'Orbigny. 

 Hippothoa divaricata Lamouroux. 

 Lepralia hilahiata Hincks. 

 Porella concinna Busk. 

 Escharoides sarsi Smitt. 

 Smittia trispinosa Johnston. 

 Smittia calif orniensis sp. nov. 

 Smittia collifera sp. nov. 

 Smittia landsborovi Johnston. 

 Smittia recticulata J. Macgillivray. 

 Phylactella collaris Norman. 

 Mucronella pavonella Alder. 

 Mucronella calif ornica sp. nov. 

 Ketepora pacifica sp. nov. 

 Eetepora pacifica catalinensis 



subsp. nov. 

 Cellepora incrassata Lamarck. 

 Cellepora costazi Audouin. 

 Cupidaria canariensis Busk. 



