I 



W. D. Lang — Genotypes of some Polyzoa. 169 



VI. — The Genotypes of certain Polyzoan Genera. 



By W. D. Lang, M.A., F.G.S. 



By permission of the Trustees of the British Museum. 



N working through the literature of Cretaceous Cribrimorph 

 Polyzoa, it has been found necessary to determine the significance 

 of the genera under which the different Cretaceous species have been 

 placed by various authors, and, consequently, the genotypes of these 

 genera. In several cases where a genus has been founded upon more 

 than one species, apparently no subsequent author has definitely 

 chosen a genolectotype from the several genosyntypes at his disposal ; 

 it has, therefore, seemed desirable to publish a list of certain genera 

 under which various authors have placed Cretaceous Cribrimorph 

 forms, namely those of which the genotype is or has been in doubt. 

 It is hoped thus to simplify the work of future authors and to reduce 

 to less confusion the somewhat chaotic use of certain names. 



I wish to record my obligations to my colleague, Dr. S. P. Harmer, 

 for much help and valuable criticism ; but it should be noted that 

 the conclusions arrived at do not always coincide with his opinions. 



Antropora, Lang, 1916, pp. 86, 91 ; genotype, A. cavernosa Lang, 

 1916, pp. 91, 92 ; Antropora is preoccupied by Norman, 1903 2 , 

 p. 87; genotype, Membranipora granidifera, Hincks, 1880 2 , p. 72, 

 pi. ix, fig. 4 ; Recent, Madeira. Ccelopora is proposed for Antro- 

 pora Lang, non Norman. I am obliged to Dr. S. P. Harmer 

 for pointing out this error of mine, as well as another in the 

 case of Corymbopora. 



Barroisina, Jullien, 1886, p. 605; genotype, Reptescharipora elegan- 

 tula von Hagenow sp., Beissel, 1865, pp. 60, 11, 90, pi. vii, 

 fig. 82; non Cellepora (Escharina) elegantula, Hag.; von Hagenow, 

 1851, p. 90, pi. x, fig. 13. 



Cellepora, Linnaeus, 1767, p. 1285; genosyntypes, six Recent species, 

 of which Cellepora pumicosa Linnaeus is taken by Hincks (1880 1 , 

 p. 398) as the genolectotype. 



Cojilopora, n.gen. ; genotype, Antropora cavernosa Lang, 1916, pp. 91 

 and 92 ; see Antropora. 



Corymbopora, Lang, 1916, pp. 382, 385; genotype, C. religata 

 Lang, 1916, p. 385. Corymbopora is preoccupied by Michelin, 

 1846, p. 213; genotype C. menardi Michelin, 1846, p. 213, 

 pi. liii, fig. 10 ; see Corymboporella. 



Corymboporella, n.gen. ; genotype, Corymbopora religata Lang, 1916, 

 p. 385. 



Cribbilina, Gray, 1848, p. 116 ; genotype, Lepr alia punctata, Hassall, 

 1841, p. 368, pi. ix, fig. 7; Cribrilina is so frequently used for 

 Cretaceous Cribrimorphs, without further explanation, that it is 

 as well to emphasize the genotype. 



Dermatopora, von Hagenow, 1851, pp. 87, 98; genosyntypes, 

 Cellepora [Dermatopora) monilifera von Hagenow, 1851, p. 98, 

 pi. xi, fig. 1 ; Cellepora lyra von Hagenow, 1839, p. 269, pi. iv, 

 fig. 8 ; Cellepora ornata, Goldfuss, 1826, pp. 26, 248, pl.ix, fig. 1 ; 

 Cellepora (Dermatopora) fanjasi von Hagenow, 1851, p. 99, 



