NORTH AMERICAN LATER TERTIARY AND QUATERNARY BRYOZOA. 171 



on the collar of the zooecium (necldike of Hincks), which is characteristic of the 

 Phylactellidac. Neither do we believe that it is identical with Mucronella spino- 

 sissima Hincks, ISSl, 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 Phylactella collaris Norman, 1866, figiu'ed by Miss 

 Robertson in 1908, in its ovicell of less width than the zotjecium and smaller in its 

 ensemble. 



Occurrence. — Pleistocene: Santa Monica (Long Wharf Canyon), California 

 (rare). 



llahltat. — Pacific: Queen Charlotte Islands. 



Plesiotype.— Cat. No. 6S690, U.S.N.M. 



Genus LAGENIPORA Hincks, 1877. 



(For dosL-ription see Bulletin 106, U. S. National Museum, p. 591.) 



LAGEmPORA 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 fossLlization, 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. 



LAGENIPORAC?) 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 distaUy, 

 little sahent, much enlarged in its pro.ximal portion. The apertura hidden at the 

 bottom of the peristome bears cardelles placed very low, antl an almost straight 

 proximal border. 



