242 University of California Publications in Zoology. [Vol. 6 



89. Crisia pacifica sp. nov. 

 PI. 20, figs. 16, 17. 



Zoarium forming large bushy tufts from 20 to 25mm. in height 

 and often 25 to 30mm. in diameter (pi. 20, rig. 17) attached 

 to seaweed, or sponge, or entangled with other bryozoa, by means 

 ill' flexible rootlets. / nti r>u><l< s long, consisting of between 13 and 

 28 zooecia; the shorter internodes having only one branch; 

 those of 19 or more zocecia possessing two; the first branch aris- 

 ing from the third, fifth, or seventh zooecium. Joints yellow, 

 piissing lo deep amber or brown. Basis rami (ba. r.) short and 

 stout, wedged in between the zooecium which gives rise to it 

 ami the mie next below. Zocecia connate, sharply curved for- 

 ward at the anterior end, surrounded by a narrow rim or 

 peristome slightly contracted. Ocecium (oe.) large, adnate 

 throughout the whole length, slightly flattened dorso-ventrally, 

 the axis inclining in the direction of the branch {br 3 .) which 

 foi ins above it, rather than with the remainder of the ooecial 

 internode {oe. int.); the third, fifth, or seventh member of the 

 internode, or sometimes higher; usually situated low in the 

 internode. i.e., as low as the third or fifth. Ooecial intemock 

 possessing two or three branches in close relation with the ovieell 

 depending upon the position of the ovieell; if it is high, as high 

 as the fifth, or higher, three branches develop about it; if it is 

 low, as in the present instance, then hut two branches are formed 

 (br-. and br 3 .) ; the remainder of the ooecial internode continuing 

 the zoarial tuft upward, ami often developing a fourth branch. 

 Oceciostonn large, its tube usually curving forward, sometimes 

 only slightly inclined forward, flattened. Oceciopore {op p.) flat- 

 tened from right to left, opening either ventrally or upward. 

 This species is one of the two found on the coast of Southern 

 California which is distinguished for the large size of the ooecia. 

 Unfortunately a typical case of branching in the ooecial internode 

 was not chosen for the figure given (pi. 20, fig. 16). In this 

 figure the ovieell occupies a position low in the internode. It is 

 here the third member, and no branch develops below it. The 

 two branches which form in the internode occupy the places 



