172 W. D. Lang — Genotypes 'of some Polyzoa. 



Phractoporklla, n.gen. ; genotype, Phractopora constrata Lang, 



1916, p. 89. 

 Porina, d'Orbigny, 1853, p. 432 ; genosyntypes, thirteen species; of 

 which two are Recent, seven Tertiary and four Cretaceous ; 

 of these, the Recent Eschar a gracilis Lamarck, 1816, p. 176, is 

 here chosen as the genolectotype. 

 Prosoporella, Marsson, 1887, p. 100; genotype, Semiescharipora 

 cornuta Beissel, 1865, p. 58, pi. vii, figs. 77-81 ; this species is 

 the genotype of Decurtaria Jullien, 1886, p. 606, which thus has 

 the priority over Prosoporella. 

 Reptescharella, d'Orbigny, 1853, p. 464; genosyntypes, sixRecent, 

 three Tertiary and twelve Cretaceous species, of which Eschar a 

 lorieri d'Orbigny, 1851, legend to pi. 604, figs. 11-12 

 {Reptescharella lorieri d'Orbigny, 1853, p. 466) is here chosen 

 as genolectotype. 

 Reptescharellina, d'Orbigny, 1853, p. 451 ; genosyntypes, twelve 

 Recent, twelve Tertiarv and five Cretaceous species, of which 

 R. horrida d'Orbigny, 1852, pi. 715, figs. 7-9, 1853, p. 456, 

 from the Senonian of Tours, Yendome and Royan, is here chosen 

 as genolectotype. 

 Reptescharinella, d'Orbigny, 1853, p. 428; genosyntypes, two 

 Recent, one Tertiary and eight Cretaceous species, of which 

 Cellepora (Discopora) sulgranulata von Hagenow, 1851, p. 91, 

 pi. xi, fig. 15, from the Maastrichtian of Maastricht, is here 

 chosen as genolectotype. 

 Reptescharipora, d'Orbigny, 1853, p. 489; genosyntypes, one 

 Recent, two Tertiary and eleven Cretaceous species, of which 

 R. meudonensis d'Orbigny, 1852, pi. 719, figs. 17-19, 1853, 

 p. 491, is here chosen as genolectotype. 

 Reptocelleporaria, d'Orbigny, 1852 2 , p. 679 [name only], 1853, 

 p. 421 ; genosyntypes, three Recent, ten Tertiary and two 

 Cretaceous species, of which R. cretacea d'Orbigny, 1852, 

 pi. 713, figs. 17-18, 1853, p. 423, from the Senonian of Meudon, 

 is here chosen as genolectotype. 

 Reptoporella, d'Orbigny, 1853, p. 474; genotype, R. regularis 

 d'Orbigny, 1852, pi. 717, figs. 6-7, 1853, p. 475; this species 

 is possibly congeneric with Leptocheilopora tenuilabrosa Lang, 

 1916, pp. 396-7, and, if so, the genus Leptocheilopora Lang, 

 1916, p. 396, must give place to Reptoporella. 

 Rhiniopora, Lang, lyl6, pp. 93, 96; genosyntypes, ten Cretaceous 

 species, of which R. aspera Lang, 1916, pp. 96, 97, is here chosen 

 as genolectotype. 

 Semieschara, d'Orbigny, 1852, p. 364; genosyntypes, four Recent, 

 two Tertiarv and nineteen Cretaceous species, of which 

 S.flalellata d'Orbigny, 1852, p. 367, pi. 708, figs. 1-4, is here 

 chosen as genolectotype. 

 Semiescharipora, d'Orbigny, 1853, p. 479; genosyntypes, one 

 Tertiary and thirteen Cretaceous species, of which S. complanata 

 d'Orbigny, 1852, pi. 718, figs. 17-20, 1853, p. 484, is here 

 chosen as the genolectotype. 

 Sxeginopora, d'Orbigny, 1853, p. 499 ; genosyntypes, S. irregularis 



