1910] Robertson: Cyclostomatous Bryozoa. 243 



relatively of the second, {or-.) and third branches [br 3 .) of a 

 more typical internode. 



C. pacifica has been obtained in the San Diego region only, dredged 

 in depths ranging from 15 to 30 fathoms. 



90. Crisia maxima sp. nov. 



PI. 20, figs. 18, 19. 



Zoaria consisting of coarse stiff, brittle, rather straggling 

 tufts 20 to 25mm. in height (pi. 20, fig. 19) fastened by numer- 

 ous rootlets tn roots of kelp, to sponge, etc. Internodes 

 long, consisting of eight, ten, or eleven zocecia in the lower 

 portion of the colony, to forty in the upper portion; most com- 

 monly of 15 to 17 zocecia, and giving rise to on ■ two branches; 



very long internodes possessing three branches; the first or 

 lowest branch arising from the fifth zooecium most commonly, but 

 frequently from the third, seventh, or ninth; the second branch 



originating anywhere between the ninth and twenty-sec I. 



occurring most frequently on the ninth, tenth, sixteenth, and 

 eighteenth. Joints dark brown, never black. Basis rami 

 (ha. r.) not wedged in. Zocecia long, slender, connate, except 

 the terminal portion which curves forward. Oozcia {oe.) 

 numerous, occurring on both main stems and side branches, of 

 great size, adnate throughout their whole length, the dorsal 

 surface not curved, the ventral surface prominent, and the 

 summit truncate; the main axis always in a line with that of the 

 branch {br\) which is given off at the distal extremity; high 

 in the internode, being the fifth, seventh, ninth, or thirteenth 

 member. On rial internode possessing three branches, the 

 relations between them and to the ooecium being identical with 

 those described on page 230. Ooeciostonu at the summit of the 

 dorsal surface; tube of oaeciostomt delicate, hyaline, inconspic- 

 uous, rising only slightly above the truncate summit and not 

 always easily detected. Oceciopon {oep.) small, and usually 

 directed forward. 



This species, like C. pacifica, is remarkable for size, especially 

 of the ovicells. The shape of the ovicells as of their apertures in 

 the two species is very different. A side view of that of C. 



