NO. 2 OSBURN: eastern pacific BRYOZOA CHEILOSTOMATA 491 



stomes and does not have the branching serial zoarial mode of growth 

 of that species. 



Described from the Galapagos Islands, Albatross Sta. D.2815. 



Hancock Stations: 7 stations at the Galapagos Islands (Albemarle, 

 James, Wenman, Hood and Marlborough Islands) ; 372-35, Indepen- 

 dencia Bay, Peru; 12-33, La Libertad, Ecuador; Socorro Island, west 

 of Mexico ; Agua Verde Bay at the tip of Lx)wer California ; San Esteban 

 Island and Guaymas, Gulf of California ; and San Miguel Island, south- 

 ern California. Shorewise to a depth of 100 fms. 



Lagenipora admiranda new species 

 Plate 52, figs. 13-15 



Zoarium encrusting small worm tubes and stems, with erect terete 

 branches 0.55 to 0.80 mm in diameter ; the colonies all small, the longest 

 branch not more than 1 cm. Zooecia small, 0.30 to 0.40 mm long by 

 about 0.25 mm wide, long-ovate, distinct and inflated when young but 

 more or less immersed with complete calcification. The frontal is a 

 tremocyst with comparatively large pores, smooth and shining but later 

 granulated between the pores. The aperture is rounded, with a rather 

 deep V-shaped sinus, length 0.10 mm (including sinus), width 0.08 mm. 

 The peristome is usually less elevated than in other species of the genus 

 but occasionally a broad proximal lip extends forward to partially cover 

 the aperture. There are 4 distal spines. The lateral-oral avicularia are 

 pedicellate, extending high above the rim of the peristome and project 

 somewhat forward ; from the inner side, just below the mandible there 

 is often a remarkable cervicorn spinous process, one branch of which 

 may fuse with the one on the opposite side to form a complete bridge 

 high above the distal end of the aperture. 



The ovicell is recumbent on the base of the succeeding zooecium, with 

 the usual lunate, finely perforated frontal area and the peristome some- 

 times rises above it to form a thin lip across the front above the orifices- 

 width 0.18 mm, length 0.13 mm. 



The small size and the remarkable development of the avicularian 

 spinules are distinctive. 



Type, AHF no. 109. 



Type locality, Hancock Station 72, Guadalupe Island, west of 

 Mexico (30°N, 120°W) at 17 fms, 8 colonies and fragments. 



