NO. 1 OSBURN : EASTERN PACIFIC BRYOZOA CHEILOSTOMATA 71 



slightly inward and forward; sometimes, when an ooecium is present, a 

 third slightly larger avicularium is produced at the end of this, its mandi- 

 ble facing upward and forward. Spines, 3 pairs of distal ones, long and 

 erect, and back of these about 5 pairs of small pointed spines directed 

 inward over the aperture. Ooecium small, but prominent, smooth, sub- 

 globular. (After O'Donoghue). 



This species cannot remain in Membranipora, as that genus is now 

 understood and, while its author did not discuss all the characters of 

 generic importance, it appears to be best allocated to Callopora. Described 

 from Northwest Bay and off Snake Island, British Columbia. 

 / 



^ Callopora (?) verrucosa Canu and Bassler, 1930 



This is a very unusual species which has not appeared in the Hancock 

 collections. Canu and Bassler (1930:9) state that "The ovicell is hyper- 

 stomial, globular," which would indicate the genus Callopora. On the 

 other hand, there are small interzooecial avicularia in the corners between 

 the zooecia and some of these are vestigial, while around the zoarial 

 border there is a band of similar heterozooecia, many of which bear 

 avicularia with a short triangular mandible. The nature of the inter- 

 zooecial avicularia and their vestigial counterparts suggests the genus 

 Antropora, but the hyperstomial ovicell prevents inclusion in that genus. 

 It was described from the Galapagos Islands, Albatross station D.2813. 



Genus GOPIDOZOUM Harmer, 1926 



"Zooecia with greatly reduced gymnocyst, the membrane covering 

 almost the entire frontal surface. Cryptocyst most developed proximally, 

 moderate to extensive. Spines present, absent or vestigial. Avicularia 

 vicarious, numerous, alternating with the zooecia, the rostrum triangular 

 proximally, usually narrow and linear distally, the mandible of corres- 

 ponding form. Ovicells hyperstomial." (Harmer, 1926:226). Genotype, 

 Membranipora plana Hincks. 



Key to Species Copidozoum 



1. Spines wanting 2 



Spines present 3 



2. Zooecia large, cryptocyst moderately developed, opesia elliptical. . 



planum 



Zooecia moderate size, cryptocyst thick and coarsely granulated, 



opesia oval tenuirostre 



3. Spines all simple spinatum 



Distal spines forked or alcicorn protectum 



