ART. 13 BRYOZOAlSr FAUNA CANU AND BASSLER 27 



This remarkable species is not rare. However, we have not ob- 

 served ovicells. Specimens preserved in alcohol will be very desira- 

 ble for anatomical study, for these alone can give us the information 

 necessary to work out the biology. 



Occn/rrence. — Galapagos Islands, D. 2813. 



nolotype.—Q?it. No. 8495, U.S.N.M. 



Family SMITTINIDAE Levinsen, 1909 



Genus SMITTINA Norman, 1903 



SMITTINA RETICULATA J. MacGJlHvray, 1842 



1889. Smittina reticulata Jelly, A, Synonymic Catalogue of Marine Bryozoa, p. 



25 (General bibliography). 

 1908. Smittina reticulata Robertson, The incrusting Cheilostomatous Bryozoa. 



of North America, University of California Publications, vol. 4, p. 306, 



pi. 23, figs. 75, 76. 

 1925. Smittina reticulata Canu and BASSLiai, Les Bryozoaires du Maroc et de 



Mauritanie, Memoires de la Societe des Sciences naturelles du Maroc, 



vol. 10, p. 39 (supplementary bibliography). 



We have found only a single dead specimen incrusting a Cellepore. 

 This species is rare in the equatorial zone. 

 Occurrence. — Galapagos Islands, D. 2815. 

 Cat. No. 8496, U.S.N.M. 



SMITTINA TRISPINOSA Johnston 1838. variety 



Plate 4, Figures 1-5 



1923. Smittina trispinosa Canu and Bassler, North American Later Tertiary 

 and Quaternary Bryozoa, Bulletin 125, U. S. National Museum, p. 143, 

 pi. 22, figs. 7-14. (Bibliography, geologic distribution.) 



Strucfwe. — The colonies are large, multilamellar, ramose, den- 

 droid, irregular; the base is orbicular, little expanded, fixed on ag- 

 glomerated pebbles of the ocean bottom. This is the first time this 

 species has been noted in this exuberant zoarial form. 



At the extremity of the branches the zooecia are poorly oriented, 

 separated by a salient thread with a granular frontal and rather large 

 areolar pores. The peristomice is orbicular, with a concave proximal 

 border. At the bottom of a very short peristomie there is a small, 

 flat lyrule and two small, strong cardelles. The frontal bears two 

 small elliptical avicularia arranged on each side of the aperture or 

 irregularly below it with the beak oriented toward the proximal 

 portion of the cell. 



On the branches the zooecia are more decorated. . Frequently a 

 large avicularium is developed at the side and even above the apert- 

 ure; its mandible is solid, falciform, never spathulate; the beak is 

 oriented toward the proximal portion of the cells. On the other 



