406 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



which bears a small suboral avicularium on its proximal lip. The front 

 is evenly arched, except in extreme calcification and there is sometimes 

 a salient thread in the separating grooves; the pores are large, evenly 

 distributed, there is no apparent distinction between the marginal and 

 frontal pores, and there is no umbo or other type of surface irregularity. 

 The primary aperture is rounded, nearly straight on the proximal border 

 with a conspicuous lyrula which is about one-third as wide as the aperture 

 and excavated at the tip. The peristome is an erect tube, continuous 

 around the aperture, usually bearing a small suboral avicularium which 

 is carried up on the edge of the proximal rim, and it is continued on the 

 ovicell above the orifice. The avicularium is small, oval and usually at 

 the level of the peristome but occasionally it is less elevated than the 

 peristome which is then notched proximally; the avicularia are some- 

 times wanting on some of the zooecia but I have never found them en- 

 tirely absent on any colony. 



The primary ovicell is comparatively small and prominent, but with 

 complete calcification it measures 0.40 to 0.45 mm in width by 0.30 to 

 0.35 mm in length, thick walled with large pores like the frontal and 

 with the peristome extending across above the orifice. 



By some unhappy accident this species was listed by Canu and Bassler 

 from the Pleistocene of Santa Barbara, California, as Robertson's Smittia 

 collifera, which is quite another species. Dr. Bassler has kindly checked 

 the identification of his material for me. Aside from Canu and Bassler's 

 reference the species has apparently not been previously observed. It is 

 a fairly common species along shore and about the islands off southern 

 California, not noted north of Santa Barbara, California, nor south of 

 the San Benito Islands, Mexico (Lat. 28°17'15''N). 



This species is dedicated to Dr. Irene McCulloch of the Hancock^ 

 Foundation, whose interest and help have contributed in many ways to 

 the completion of this monograph. 



Type, AHF no. 85. 



Type locality, Hancock Station 1295-41, Santa Cruz Island, Cali- 

 fornia, 34°00'30''N, 119°3r30"W, at 19 fms. Other localities: Sta. 

 894-38 and 1279-41, San Miguel Island; 1143-41, Portuguese Point; 

 1217-41, Point Fermin; 1280-41 and 1283-41, Santa Rosa Island; 1300- 

 41, Santa Cruz Island; 1407-41, Santa Catalina Island, and San Pedro 

 and Newport Harbor, all from southern California. Station 1250-41, 

 San Benito Islands, oflF Lower California. Also from the Lower Pleisto- 

 cene, Timms Point, California, collected by G. P. KanakofF. 



