ON FOSSIL POLTZOA. 147 



85. HORNERA BISERIATA, Philippi. 

 affinis, Milne-Ed. 

 STRIATA, ,, 



andegavensis, Michelin. 

 biloba, Reuss. 

 terrucosa, Reuss. 



SERIATOPORA, ,, 



radians, Defrance (non Lamx.). 

 CRISPA, ,, 



ELEGANS „ 



decipiens, Eichwald. 



C. Kreideformation. 

 Langethali, Hagenow. 



OCULATA ,, 



COMPRESSA „ 



TRIGONOPORA ,, 



TUBULIFERA ,, 



(Idmonea) contortilis, Lonsd. 



CARINATA, ReUSS. 



In the same synopsis, Hagenow gives a list of eight species of Idmonea 

 as belonging to his stage B, and twenty-seven belonging to the stage C, 

 and only one, I. triquetra, Lamx., in the stage D or the Juraformation. 



Mr. Busk's list (' Crag Polyzoa') is valuable on account of the care 

 with which he has worked the known species for comparison and identi- 

 fication of the fossil forms described by him as found among his Crag 

 Polyzoa. Busk describes eleven species, some of which he considers to 

 be new, others are referable to forms previously described by authors ; 

 these are given under the two divisions — - 



Fenestrate and Ramos.e. 



103. Hornera infundibulata, Busk (C. Crag), ' Crag Poly.' p. 97, 



pi. xiv. fig. 1. 



104. Hornera reteporacea, M.-Edw., „ „ p. 98, 



pi. xiv. fig. 2. 



105. Hornera canaliculata, Busk, „ ,, ,, 



pi. xiv. fig. 3. 



106. Horxera rhipis, Busk, ,, ,, p. 99, 



pi. xiv. fig. 4. 



107. Hornera humilis, Busk, „ „ p. 100, 



pi. xiv. figs. 5 and 6. 



108. HORNERA PERTUSA, Busk, „ ,, p. 101, 



pi. xiv. fig. 7. 



109. Hornera Hippolyta (?), Defrance. „ „ „ 



pi. xiv. figs. 8-9 = H. Hippolyta, hippolytlius, M.-Edw. and 

 Defrance. 



110. Hornera lunata, Busk (C. Crag), ' Crag Toly.' p. 102, pi. xvi. 



fig. 4. 



111. Hornera frondiculata, Lamx. (C. Crag), 'Crag Poly.' p. 102, pi. 



xv. figs. 1-2, pi. xvi. fig. 6 = Retepora frondiculata, Lamx. = 

 Millepora tubipora, Ellis & Sol. = Millepora lichenoides, Linn., 

 Pallas, Esper =Hornem a^?H('s,M.-Ed. = Hornera andeyavensis, 

 Michelin. 



l2 



