106 



PKOCEEDIFGS OF THE NATIONAL. MUSEUM 



VOL. 72 



with proximal concave border; the peristome is very thin and very- 

 little salient. The ovicell is large, globular, placed on the distal 



zooecmm. 



Measurements. 



\ha = 0.18 mm 

 -Apertm-eu _ 



Zooecia 



Lz- 



0.18 mm. 

 0.90-1.00 mm. 



Us = 0.35-0.50 mm. 

 Structure. — Two specimens only have been found, the smaller of 



which was destroyed in the 

 preparation of the operculum. 

 The latter is wide suborbicular; 

 the proximal border is slightly 

 sinous, the muscular attach- 

 ments are long and very little 

 removed from the border. 

 This is the typical operculum 

 of the Hippoporae. On our 

 dry specimen we have not been 

 The ecto- 



FiQ. 19.— Ofekcula, X 85. 



DANA, NEW SPECIES. B. 



A. HiPPADENELLA FLORI- 

 HlPPODIPLOSIA PERTUSA 



EsPEE, 1894. The thickened portion of the in- 

 ner LINE indicates THE PLACE OF THE OPERCULAR 

 MUSCLES. C. HIPPOMENELLA RUBRA, NEW SPECIES 



able to verify exactly if the operculum closes the ovicell. 

 cyst is very thin. 



Occurrence. — Cedar Keys, Fla. 



Eolotype.—Csit. No. 7525, U.S.N.M. 



Genus HIPPODIPLOSIA Canu, 1916 



HIPPO DIPLOSIA PEKTUSA Esper, 1794 



Plate 9, Figure 6; Plate 32, Figure 10; text Figure 196 



1873. Escharella pertusa Smitt, Floridan Bryozoa. KoDgl. Svenska Veten- 

 skaps-Akade miens Handlingar, vol. 11, p, 55. 



1880. Lepralia pertusa Hincks, British Marine Polyzoa, p. 305, pi. 43, figs. 



4,6. 



1881. Lepralia pertusa Jullien, List des Bryozoaires k Etretat. Bulletin 



Soci6t6 Zoologique de France, vol. 5, p. 11. 

 1896. Hippoporina pertusa Neviani, Corellarii e Briozoi neogenici di sar- 



degna. BoUetina della Societd,, geologica Italiana, vol. 15, p. 15. 

 1896. Lepralia pertusa Hennig, Bryozoer fran Westgronland. Kongl. Veten- 



skaps-Akadenaiens Forhandlingar, vol. 63, p. 368. 

 1902. Lepralia pertusa Calvet, Bryozoaires marins des cotes de Corse. 



Travaux Institut de Zoologie University Montpellier, ser. 2, mem. 



No. 12, p. 26. 



1902. Lepralia pertusa Calvet, Bryozoaires marins de la region de Cette. 



Travaux Institut Zoologie University Montpellier, ser. 2, mem. No. 

 11, p. 51. 



1903. Lepralia pertusa Jullien and Calvet, Bryozoaires provenant des 



campagnes del' Hirondelle. Resultats du Campagnes Scientifiques 

 du Prince de Monaco, fasc. 23, p. 69, fig. 134. 

 1905. Eschara nordlandica Nordgaard, Hydrographical and biological 

 investigations in Norwegian fiords, p. 167, pi. 4, fig. 32-36 (fide 

 Nordgaard) . 



