NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 171 
on the collar of the zooecium (necklike of Hincks), which is characteristic of the 
Phylactellidae. Neither do we believe that it is identical with Mucronella spino- 
sissima Hincks, 1881, from Australia, and Hincks himself has noted some important 
differences. As we have not the material at hand for comparison we are adopting 
Hincks name of 1884, as our fossil is identical with the variety figured by him from 
the Queen Charlotte Islands. 
The trace of numerous spines on the peristomice is quite visible on our fossils. 
We have not observed the tubular system noted by Hincks, but on many of the well- 
preserved zooecia we have observed the transformation of the tremopores into 
divergent tubules rather long and very little salient. There are eight spines on the 
peristome of the ovicelled zooecia. 
This species differs from Phyladella collaris Norman, 1866, figured by Miss 
Robertson in 1908, in its ovicell of less width than the zooecium and smaller in its 
ensemble. t 
Occurrence. —Pleistocene: Santa Monica (Long Wharf Canyon), California 
(rare). 
Habitat. —Pacific: Queen Charlotte Islands. 
Plesiotype. —Cat. No. 68690, U.S.N.M. 
Genus LAGENIPORA Hincks, 1877. 
(For description see Bulletin 106, U. S. National Museum, p. 591.) 
LAGENIPORA SPINULOSA Hincks, 1884. 
Plate 40, fig. 7. 
1884. Lagenipora spinulosa Hincks, Polyzoa of the Queen Charlotte Islands, Annals and Magazine 
of Natural History ser. 5, vol. 13, p. 57 (sep. 31), pi. 3, fig. 4; p. 210 (sep. 40), pi. 9, fig. 4. 
1908. Lagenipora spinulosa Robertson, The incrusting Cheilostomatous Bryozoa of the west coast 
of North America, University of California Publications, Zoology, vol. 4, No. 5, p. 283, 
pi. 18, fig. 37. 
Our figured specimen, much changed by fossilization, gives only a very poor 
idea of the beauty of this fragile species. The other specimens observed are equally 
poorly preserved, but there is no occasion to doubt their identity with this recent 
species. 
Occurrence. —Pleistocene: Dead Mans Island, off San Pedro, California (rare). 
Habitat. —Pacific: Off California. 
Plesiotype.— Cat. No. 68691, U.S.N.M. 
LAGENIPORA(?) BREVICOLLIS, new species. 
Plate 24, fig. 9. 
Description. —The zoarium incrust Cellepores. The zooecia are distinct, 
separated by a deep furrow, elongated, oriented, elliptical; the frontal is very convex 
and covered with tremopores. The peristome is incomplete, interrupted distally, 
little salient, much enlarged in its proximal portion. The apertura hidden at the 
bottom of the peristome bears cardelles placed very low, and an almost straight 
proximal border. 
