W. D. Lang — Cretaceous Cheilostome Polyzoa. 441 



Remarks. — Without seeing the specimens themselves it is impossiV)le 

 to know the detailed structure of the three species here included 

 with J), gutta in Dacri/opora. As far as can be seen, however, they 

 conform better with Dacryopora than with any other genus, and, 

 consequently, are provisionally placed here. Of the various genera 

 xinder which they have been placed, Ilemlranipora ' and Pyripora ^ 

 have incompletely calcareous front walls, Microporella^ a.^^ Eacharina*' 

 were founded for several Recent multiserial species, and Uippothoa^ 

 and Dia%enxia ® have raj'riozoid ' apertures. 



Key to the genus Dacryopora. ' 



T. Zooeeia elongate, capitula nearly thrice as long as broad ; caudae 



very short. D. simplex (d'Orbigny). 

 II. Zocecia short, capitula one to two and a quarter times as long 



as broad. 

 a. Zooeeia with very long caudte. 



1. Zooeeia more or less parallel-sided . D. gutta, n.s-p. 



2. Zooeeia fusiform . . . .J), elegans (d'Orbigny). 

 h. Zooeeia with very short caudse . . D. reussi, nom. nov. 



Dacryopora simplex (d'Orbigny). 

 Syno7iymy. 

 Hippothoa simplex, d'Orb. : d'Orbigny, Pal. Frang., Terr. CrM., vol. v, 



pi. dccxi, figs. 5-8, 1852 ; op. cit., p. 385, 1853 ; op. cit., p. 1092, 1854. 



Cenomanian : Sarthe. 

 H. simplex, d'Orbigny: Pictet, Traitd de PaUontologie . . . , 2nd ed., 



vol. iv, p. 103, 1857. Cenomanian. 

 H. simplex, d'Orb. : Gabb & Horn, Proc. Acad. Nat. Sci. Philadelphia for 



1860, p. 366. 

 H. simplex, d'Orb. : Gabb, Journ. Acad. Nat. Sci. Philadelphia, ser. II, 



vol. iv, p. 400, 1860. 

 H. simplex, d'Orb. : Gabb & Horn, Journ. Acad. Nat. Sci. Philadelphia, 



ser. II, vol. v, p. 157, 1862. 

 non H. simplex (d'Orb.) : Vine, Quart. Journ. Geol. Soc, vol. xlvi, 



pp. 486, 461, 1890. Red Chalk : Hunstanton. (Vine's specimen No. 40, 



B.M. specimen D. 2052.) 

 ? Jf . simplex, d'Orb. : Vine, Proc. Yorks. Geol. Soc, N.S., vol. xi, pt. iii, 



pp. 385-6, 396, 1891. Red Chalk: Hunstanton. 

 '> Membranipora{'^) simplex, d'Orb.: Vine, Eep. Brit. Assoc, for 1890, 



p. 396, 1891. Eed Chalk : Hunstanton. 

 1 Hippotlwa simplex , d'Orb. : Vine, Proc. Yorks. Geol. Soc, N.S., vol. xii, 



pt. ii, p. 156, 1892. Gault : Barnwell, Cambridge. 



1 De Blainville, Manuel cVActinologie, p. 447, 1834. Includes eleven 

 genosyntypes. 



- D'Orbigny, loc cit., see p. 436, 1850. 



^ Hincks, Ann. Mag. Nat. Hist., ser. IV, vol. xx, p. 526, 1877. Genotype, 

 Eschara ciliata, Pallas. 



■• Edwards, in Lamarck, Histoire Naturelle dcs Animaux sans Vertihres, 

 2nd ed., vol. ii, p. 230, 1836. 



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

 1821, p. 82. Seep. 436. 



^ Jullien, Mission Scientifiqtie du Cap Horn, 1882-3, torn, vi, Zoologie— 

 Bryozoaires, p. 28, 1888. Genotype, Cellepora hyalina, Linnaeus, Systema 

 NaturcB, 12th ed., vol. i, pt. ii, p. 1286, 1767. 



'' i.e. of the general shape of the apertures in the family MyriozoidsB. 



