22 BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 



MEMBRANIPORA LACROIXII Audouin, 1826. 



Plate 29, fig. 4. 



1826. Fluslra lacroixii ,\udouin, Explication des planches de Polypes de I'Egypte. ... In 

 Savigny's Description de L'Egypte, Historie Xaturelle, vol. 1, 1809, pt. 3, p. 240, pi. 10, 

 fig. 9 (not Busk, Hincks, Canu). 



Measurements. — Ordinary zooecia: Opesia , „'.,., 



■^ ^ I Zo = 0.22 mm. 



„ . lLz = 0.50 mm. 



ZiOOeCia , r. on n o i 



U2 = 0.32-0.34 mm. 



First zooecia of a row: 



„ . (7(0 = 0.40 mm. 



Upesiaj^^^j^ 24-0.28 mm. 



„ . fZ2 = 0.50-0.56 mm. 

 Zooecia 7 _ . „ 



1 Z2 = 0.40 mm. 



Variations. — The mural rim is flat and finely striated. There is a constant 

 tubercle at each interzooecial angle. The zooecium giving rise to two or more 

 series is much larger. Our specimen is exactly like Audouin's figure of 1826. 



Affinities. — Years ago Waters noted that the Memhranipora lacroixi of Busk 

 and Hincks was probably not Audouin's species. Canu, sharing this opinion, has 

 carefully revised the sj-nonymy.* The unexpected discovery in America of 

 Andouin's species confirms therefore the idea of both Waters and Canu. There is no 

 necessity of a new name, since our specimen appears to indicate Memhranipora 

 more than Conopeum. 



This species differ from Memhranipora fossulifera Ulrich and Bassler, 1904, in 

 the presence of tubercles at the interzooecial angles. It is much larger than Bifiustra 

 savarii Smitt, 1872, which belongs moreover to another genus. 



Occurrence. — Pliocene (Waccamaw marl) : Waccamaw River, Horry County, 

 South Carolina (rare). 



Hahitat. — Red Sea or Mediterranean (Audouin). 



Plesiotype. —C&t. No. 68405, U.S.N.M. 



MEMHRANIPORA TUBERCULATA Bosc, 1802. 



Plate 33, figs. 3-5. 



1802. Flustra tuberculata Bosc, Histoire naturelle des Vers, vol. 3, p. 118. 



1839. Flustra tehuelea D'Orbigny, Voyage dans I'Amerique-M^ridionale, vol. 5, pt. 4, Zoophytes, 



p. 17, pi. 8, fig. 10-14. 

 1858. Memhranipora tuberculata Busk, Zoophytology: On some Madeiran Polyzoa, Quarterly 



Journal of Microscopical Science, vol. 6, p. 126, pi. 18, fig. 4. 

 1898. Memhranipora tehuelea Waters, Observations on Membraniporidae, Journal of the Linnean 



Society, Zoology, vol. 26, p. 674, pi. 48, fig. 6-8. 



1908. Memhranipora tehuelea Robertson, The incrusting Cheilostomatous Bryozoa of the West 



Coast of North America, University of California Publications, Zoology, vol. 4, no. 5, 

 p. 265, pi. 15, fig. 16, 17; pi. 16, fig. 18. 



1909. Memhranipora tuberculata Norman, The Polyzoa of Madeira and neighboring Islands, Journal 



Linnean Society London, Zoology, vol. 30, p. 286. 



< Sec North American Early Tertiary Bryozoa, p. 89. 



