NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 649 



to broadly lobate with the lobes extending between clusters of tubules; 

 the ooeciostome is usually located at the side of a zooecial tube, some- 

 times free from it or more or less connate, varying in size, height and 

 form among the different species. Genotype, T. transversa Lamarck, 

 1816 ( = T. liliacea Pallas, 1766). 



Key to Species of TubuUpora 



1. Zoaria comparatively large and coarse, often irregular in form, 



the ovicell usually much ramified, ooeciostome tall .... 2 

 Zoaria smaller, often simply lobate, ovicell little ramified, the 



ooeciostome shorter 5 



2. Ooeciostome high, much compressed, the aperture slit-like . . 3 

 Ooeciostome high, little compressed, aperture ovate 4 



3. Peristomes connate in series or bundles, ooeciostome tall and 



conspicuous, connate with a tubule at its base, enlarging 

 upward and slightly flared, the aperture compressed (in- 

 cluding var. fasciculifera) tuba 



Peristomes sometimes in series, ooeciostome smaller and less 

 conspicuous, its aperture more narrowly slit-like and not 

 flared flabellaris 



4. Peristomes connate, forming high fascicles, the tips free; 



ooeciostome scarcely compressed, tall, about as wide as a 

 peristome (0.25 mm), slightly expanded at the tip . admiranda 

 Peristomes not at all connate; ooeciostome slightly smaller 

 than a peristome, not compressed, its tip slightly expanded, 

 not connate with a peristome egregia 



5. Zoarium with erect slender branches, idmoneiform; ovicell 



small, ooeciostome slightly distal to the first member of a 



fascicle, short, flared ftexuosa 



Zoarium adnate, small neat-appearing species 6 



6. The dorsal side of the zoarium has numerous short attachment 



processes and near the base these give the edge a serrated 



appearance pulchra 



No attachment processes ' 



7. Zoarium widely flabellate; ooeciostome comparatively short, 



connate at base and widely diverging, flared at the tip to a 



width of 0.18 mm pacifica 



Zoarium lobate, ooeciostome short erect, connate at base or 



free, flared at the tip to a width of 0.12 mm .... concinna 



