386 REPORT—1890. 
24, Reptomulticava mamilla, d’Orb. Ib. p. 1041. 
28. Heteropora’ undata, d’Orb. (Zonopera undata, d’Orb.), Ib. 
p. 932. 
1. Apsendesia papyracea, d’Orb. (Unitubigera papyracea, d’Orb.), 
Ib. p. 761. 
3. Ceriopora mamillosa, Rom. (Ieptonodicava mamillosa, d’Orb.), Ib. 
p. 1015. 
12. Melicertites Meudonensis, d’Orb. (Entalophora, Morris), Ib. 
p- 622. 
Stage 23. Danray, d’Orb. 
15. Heteropora tenera, Hagenow, d’Orb. Terr. Crét. p. 1070. 
29. Actinopora elegans ? (Lopholepis sp., Hag.). 
38. Ceriopora cavernosa, Hag., d’Orb. Terr. Crét. p. 1034, 
By the above rearrangement it will be seen that the stratigraphical 
position of the Faringdon Polyzoa, if the species be identical with those 
of d’Orbigny’s, will be as follows :— 
Jurassic Formarion, Stage 10—Bajocian, 1 species 
Cretaceous Formation, ,, 17—Neocomian, 7 species. 
8 » 18—Aptian, no record. 
~ » 19—Albian (Gault), 1 species 
3 », 20—Cenomanian, 9 species. 
Fs » 21—Turonian, 1 species. 
3 », 22—Senonian, 9 species. 
7 », 2d8—Danian, 3 species. 
D’Orbigny divides the ‘ Bryozoaires’ into two groups—CrLLULINES 
(Cheilostomata, Busk), and Crenrrirucinis (Cyclostomata, Busk) ; and he 
brings out the remarkable fact that, while the Polyzoa of the Cyclo- 
stomatous type, which begin in the Silurian epoch, are more or less persis- 
tent throughout all the geological changes of the earth, those of the 
Cheilostomatous type had their origin (very faintly developed, however) 
in the Neocomian strata ; for d’Orbigny records only three species—one 
in each—in his first three stages of the Cretaceous epoch. This opinion, 
however, has to be modified in the light of recent investigations in this 
country and in America; but even now Cheilostomatous Polyzoa are very 
rare in rocks below. the Cretaceous. In the absence, therefore, of Cheilo- 
stomatous Polyzoa in the Faringdon material, and the preponderance of 
Cyclostomatous forms, [ am inclined to infer that the Faringdon Polyzoa 
fauna, in spite of its mixed and anomalous character in the so-called 
‘ Neocomian Sands,’ were derived from the disintegration of rocks before, 
rather than after, the epoch of the Upper Chalk; and in all probability 
the identifications in the Catalogue of Senonian and Danian species, given 
above, well merit reconsideration by some competent authority. 
As regards the Polyzoa of Neocomian rocks of Louth in Lincolnshire, 
it may be advantageous to science if I draw attention to certain species 
which came into my possession some time since. In 1886 I received from 
Mr. Wallis Kew, of Louth, three small fragments of a polyzoon from the 
Neocomian clay at Donnington-on-Bain, near Louth. This species I 
described in ‘ Annals and Magazine of Natural History,’ January 1887, 
pp. 17-19, as Entalophora gracilis, Goldf., var. When I began to gather 
together material for my papers on Cretaceous Polyzoa, I did my best to 
