436 W. D. Lang — Cretaceous CJceilostoone Polyzoa. 



II. — Some New Genera and Species of Cretaceous Cheilostohi k 



Polyzoa. 



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



(Published by permission of the Trustees of the British Museum.) 



(PLATE XXXIV.) 



TT:ERPET0P0RA ANGLICA, the genotype of tlie new genus 

 Herpetopora, described in this Magazine/ was the name 

 proposed for a new species that hitherto had been wrongly recorded 

 as Hippothoa dispersa (Hagenow).^ It was then remarked that the 

 English form did not belong to the genus Sippothoa, of which the 

 genotype is H. divancata^ ; but, while Herpetoyora was proposed for 

 the English species, no suggestion was made for a genus to include 

 Hippothoa dispersa (Hagenow) that certainly could not remain under 

 Hippothoa. It is proposed here to describe in detail Hagenow's species, 

 to give it a generic name, and, further, to consider some allied forms. 



In 1860 Gabb & Horn published a description of Hippothoa 

 irregularis (since redeseribed and figured as Pyripora irregularis*) 

 from the Danian of New Jersey, An examination of a specimen 

 shows that it differs from Herpetopora in possessing a boldly beaded 

 termen, and in this it resembles an undescribed form, from Faxe 

 and the form hitherto known as Hippothoa dispersa (Hagenow). 

 Pyripora, however, was founded by d'Orbigny ^ for three geno- 

 syntypes, of which one — Hscharina crentdata, lieuss — was selected as 

 the genotype ^ a year (or two years) after Pyripora was introduced. 

 JEscharina crenulata, Keuss, differs from the three forms under 

 consideration (those from New Jersey, Ease, and Riigen respectively) 

 in several characters, notably in the form of branching, and neither 

 these nor Herpetopora'' can fall under Pyripora. Moreover, of the 

 three, the Riigen form differs from the other two in having dimorphic 

 zooecia, though neither this feature nor the beaded termen is shown 

 in Marsson's figures. If specimens are suitably painted (with indigo 

 water-colour, for instance) both these characters are plainly seen. 

 The two genera Allantopora and Marssonopora are proposed, the 

 former to include the Danian species from New Jersey and from Faxe 

 and the latter for the Senonian form from Hiigen. 



o a Allantopora, n.g.* 



synonymy .^ ' ^ 



Hippothoa (partim), Gabb : Gabb & Horn, Johnson^, Nickles & Bassler. 

 Pyripora (partim), Conrad in Cook, Gabb & Horn, Meek, Nickles & Bassler, 

 Ulrich & Bassler in Weller, Vine. 



^ Geol. Mag., Dec. VI, Vol. I, pp. 5 and 6, 1914. 

 ^ For references see p. 438. 



^ Lamouroux, Exposition Mithodique des genres de VOrdre des Polypiers, 

 p. 82, 1821. 



* For references see p. 439. 



^ D'Orbigny, Prodrome de PaUontologie Stratigraphique imiverselle, vol. ii, 

 p. 263, 1850. 



® Bronn & Eoemer, Lethma Geognostica, vol. ii, pt. v, p. 106, 1851-2. 



"" See a criticism by Canu, Revue critigtie de Paleozoologie, vol. xviii, 

 p. 90, 1914. 



* 6 aWas, ' a sausage ' ; suggested by the strings of zooecia. 

 ^ For references see p. 437. 



