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



depths. Some colonies (fig. 40) have relatively broad branches 

 and show little, if any. anastomosis. These colonies were ob- 

 tained in relatively deep water. Prom shallower water and from 

 the shore come large masses of complexly anastomosing colonies 

 (fig. 41). Wherever two branches touch each other apparently, 

 or where they touch a hard substance, as a shell, they grow East. 



This species is very abundant, especially in deep water, being frequently 

 taken in the dredge off shore between Santa Catalina Islands and Coronado 

 Islands in depths ranging from L50 fathoms to li fathoms. 



37. Crisulipora gen. nov. 



Zoarium dendroid, ealcareous, composed of segments or inter- 

 nodes united by chitinous joints. Zocecia tubular, disposed in 

 several alternate rows. Ocecium an inflation of the surface of an 

 internode. 



This genus is unlike other genera of the Tubuliporidae in 

 possessing chitinous articulations between the branches, and in 

 being attached by flexible rootlets. In these two respects it 

 resembles Crisia. In the form and arrangement of its zocecia, 

 however, and more especially in the formation of its ocecium, 

 this genus resembles members of the family Tubuliporidae. In 

 some respects it seems to be allied with Filisparsa Waters, or 

 Ti rvia Jullien. But the differences between it and either of these 

 genera seem to warrant its erection into a new genus. 



us Crisulipora occidentalis sp. nov. 

 PI. 21, figs. 22, 23, 24. 



Zmiria forming large, stiff, brittle masses, from 25 to 30mm. 

 in height (pi. 21, fig. 23) attached by a \'i-w rootlets extending 

 from the lower zocecia, some of which possess a hook or clasp 

 (fig. 24, h.) by which the colony is anchored; others possessing 

 a lout;', stolon-like process (sto.) entangled in sponge, masses of 

 hydroids, other bryozoa, etc. Internodes long, typically from 

 6 to 8 mm., consisting of a varying number of zooeeia, from 10 to 

 30 or more; each internode beginning in two zoiecia (fig. 22) 

 which spread widely; between these other zoiecia arising, the 

 rows in the fertile internode (fir. int.) at least, increasing to 



