490 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



sionally half as long as the zooecial body, semierect, smooth and without 

 costae or striae, usually little or not at all flared, but the tall peristomes may 

 be conspicuously flared. The primary aperture is ovate, about 0.12 mm 

 long by 0.10 mm wide. The usual pair of minute avicularia is present, 

 scarcely elevated above the rim, often absent. The "small orbicular 

 avicularia" on the frontal, mentioned by Canu and Bassler, are not 

 present in our material. 



The ovicell is small, 0.16 mm wide, located well above the base of 

 the peristome, the perforated area covering practically the whole upper 

 surface. 



Described from the Galapagos Islands, Albatross Sta. D.2813. 



Hancock Stations: 332, Bahia Honda, Panama; 328, Cocos Island, 

 ofif Costa Rica ; 276 and 278 at San Esteban and Tiburon Islands in the 

 Gulf of California; and 10 stations among the Galapagos Islands (Albe- 

 marle, Chatham, Hood and Harrington Islands). Shallow water to 80 

 fms. 



Lagenipora lacunosa Bassler, 1934 



Plate 59, fig. 10 



Lagenipora verrucosa, Canu and Bassler, 1930:35. 



Lagenipora lacunosa Bassler, 1934:35 to replace L. verrucosa Canu and 



Bassler 1930 (not Canu and Bassler, 1928). 



Encrusting shells, pebbles, corallines and encrusting bryozoans. The 

 zooecia are moderately large, 0.70 to 0.85 mm long by about 0.50 mm 

 wide, lageniform but with a much shorter "neck" than most of the 

 "flasks" in this genus. The front is inflated, roughened and coarsely 

 punctate. The primary aperture is ovate, 0.16 mm long by 0.14 mm 

 wide. The peristome is short, thick-walled, and without costules, little 

 or not at all flared, its rim smooth or with low, irregular prominences 

 in older stages. In later stages of calcification the frontal tremocyst may 

 cover most of the short peristome. The small paired oral avicularia are 

 situated farther forward than is usual in the genus, distal to the middle 

 of the aperture. 



The ovicell, a little more than a hemisphere, is located low down 

 at the base of the peristome, resting on the base of the succeeding zooecium 

 and with advancing calcification may become partially embedded ; the 

 perforated area varies with age from semicircular to lunate. 



This species has much resemblance to L. verrucosa Canu and Bassler 

 (1928:137, non verrucosa 1930:35), but is larger, with shorter peri- 



