1G2 



iiErouT — 1884. 



14. 



15. 



IG. 

 17. 



18. 

 19. 



'JO. 

 ■Jl. 



Ckrioi'01!\ si'in.M.is, fi<^. 2, Miic'stricht, 

 CKUiorouA vAi;iAiitMS, !Munst. 



Tiib. XXXVII. ti>?. t], :Mucstriclit, Astrupp, 

 Ci;i!I()1'()i;a vknosa, GoldfuKs, 



Tab. XXXI. lijr. 2, Maestricht . 

 Ci:i!Ioi'(ii;a vknosa, (loldfu.s.s, 



fig. 7, Maestricht. 

 Ci;ui()i'oi!A i'<)r.Y.\Kii;i'iiA, ,, 



Tab. XXX. fig. IJ.KsHcn. 

 Ci;i!K)1'oi;a sp(ingiti;s, „ 



fig. 14, Maestricht, Ks.scn. 

 Ceimoi'Oiia sti:i.laia, GoMfuss, 



Tab. XXXI. fig. 1, Essen. 

 Ckkioi'oka J)iai)i;ma, Goldfuss, 



Tab. XXXIX. fig. 12, Ksseu. 



Tab. XXXV] I. fig. ;i „ 

 Ci'.Kioroi.'A .MiTiiA, Goldfuss, 



Tab. XXX. fig. ]:]. 



CkUIOPOIJA (.'lilBKOtiA. ,, 



tig. IG. 



' Petrcfac' Tab. X 1. 



Tab. X. 



Tab. X. 



1. Ri:ti:poi!A ci.atiiijata, Goldf. 

 fig. 12, Maestricht. 



2. Rkti;i'Oi;a i,ichi:noii)i;s, „ 

 fig. lo, Maestricht. 



3. RlOTEI'OUA 'JlU'.NC.VrA, „ 



fig. 14, Maestricht. 



RkTEI'OUA IMSTICIIA, „ 



fig. 15, Maestricht. 



RkTKI'OKA CAN(*i:r.LATA, „ 



Tab. XXXVI. fiir. 17 



(Idmonea) 



Tab. X. 



„ Tub. I.\. 



.Maestricht. 



Maestricht Beds, 



HaGfcuow. 



The most systematic work that has yet been published on the Cre- 

 taceous Bryozoa (or Polyzoa) i3 that of Frederick V. Uagenow — ' Die 

 Bryozeen der Miistrichter Krcidcbildung,' 12 plates, 1851. In this mono- 

 graph the writer figures and desci'ibes about 200 species of Polyzoa, 

 many of which aro new, others arc re-described, from Goldfuss chiefly ; 

 and, as Hagenow had access to the original specimens of Goldfuss, J 

 think we may pretty safely rely upon his judgment in the redistribution 

 of types. The classification of the author is very simple. For a portion 

 of the Cyclostomata, Busk, Hagenow adopted the division A, Tibui.i- 

 PORINA, Milne-Edwards ; for another poi'tion he adopted Bronn's division 

 B, Cerioporina. His division C, Salpingixa embraces oidy two doubtful 

 genera — Escharites,-'Rdm., and Inversarut, Hag. — which in one sense may 

 be considered as passage forms ; still it is very doubtful whether some of 

 the Salpingixa do not belong rather to the CvcLOSTd.MATA than to the 

 Cheilostomai'A. The group D, Ukceolata, Hag., are Cheilostomatous. 

 Except that I shall begin with the latter groups — C and D — first, I shall 

 not otherwise disturb the arrangement of the author; but I have not 

 thought it necessary to load my text with reference to all the plates, 

 especially as the species are numbered. 



