University of California Publications. [ ZOOLOGY 
bo 
4 
TS 
22. Bugula longirostrata, sp. nov. 
Pl. XI, figs. 59, 60. 
Zoarium consisting of delicate feathery tufts, branches some- 
what spirally arranged (fig. 59). Branching dichotomous, the 
branches long and slender. Zoawcia (fig. 60, zoe.) biserial, much 
elongated, slightly narrowed below, the lateral walls rolling for- 
ward, terminating at the summit on each side of the margin in 
a minute denticle (d.). Aperture occupying more than three- 
fourths of the front of the zocecium. Avicularia (av.) extremely 
slender and long, being more than half the length of a zocecium ; 
the beak (bk.) alone being almost half as long as the whole 
appendage; pedunculate, arising on the outer, lateral wall of 
the zocecium about half way from its summit; when extended in 
a direction parallel with the zowcium, the tip of the beak of the 
avicularium extends beyond the summit. Owcia (o0e.) small and 
shallow, just sufficiently high to inclose the ovum (0.), but cover- 
ing only a portion of the embryo (emb.), the major portion of 
which occupies the upper part of the zoecium. Rootlets arising 
from the dorsal wall of the lower zoccia. 
This species is the most delicate of all the California Bugulas. 
In the relatively large size of its avicularia it resembles the 
preceding species, B. curvirostrata. In the Bugulas generally, 
the muscular part of the avicularium exceeds the beak in size; 
in the two forms, B. curvirostrata and B. longirostrata, the rela- 
tive size of these two parts is reversed, and the beak in each is 
the longer. B. longirostrata also resembles B. pacifica in the 
shallowness of its owcia, these being insufficient to inclose the 
embryos when fully grown. The ocwcium of B. longirostrata is 
shghtly larger than that of B. pacifica, but relatively to the 
length of the zowecium it is much the same in both species. 
B. longirostrata has been obtained from one locality only, in 
the submerged valley off La Jolla at a depth of 125 fathoms. 
The specimens consist of a few detached pieces, one of which 
possesed rootlets as shown in the habit sketch (fig. 59). 
