ON CRETACE0U3 POLYZOA. 313 



= Truncatula repens, Hag. A third species of OscuIijJora (0. Eoyana, 

 d'Orb., pi. 800 {his), figs. 1-4) is recorded by d'Orbigny ; but I have not 

 seen the plate referred to, as it does not exist in my copy, and, so far as 

 I am aware, in no other copy known to me. Neither Osculipora, d'Orb., 

 nor Truncatula, Hag., can in any sense be regarded as the same as 

 HomceosoJen, Lonsd. The date of Homoeosolen, Lonsd., 1850, and Trun- 

 catula, Hag., 1851, is sufficient apology for the restoration of the genus, 

 ■which was fully described by Lonsdale. As, however, d'Orbigny's names 

 are occasionally quoted by authors, I give full references to the Atlas 

 of plates, for the purpose of shovcing the rich variety of forms belonging 

 to this or allied species found in the Chatham Chalk : — ' 



0)7. Homoeosolcn ramulosua (Mantell), Lonsd., ' Geol. Sussex,' p. 307, 



pi. 18b, fig. 3 (typica). 



68. ,, „ variety, pi. 18b, figs. 4, 5. 



69. ,, „ forma {Truncatula?) aculeata, d'Orb., 



pi. 796, figs. 1-5. 



70. ,, „ forma {Truncatula) alternata, d'Orb., 



pi. 797, figs. 1-4. 



71. ,, „ forma {Truncatula) carinata, d'Orb., 



pi. 797, figs. 7 and 12. 



One of the localities (British) given by d'Orbigny for T. carinata is 

 Folkestone ('Terr. Cret.,' p. 1050). 



1851. Genus Tecncatula, Hag., 'Eryoz. Maestricht. Kreid.,' p. 34. 



The following are sufficiently distinct at Chatham to merit recogni- 

 tion : — 



72. Truncatula subpinnata, d'Orb., ' Terr. Cret.,' p. 1055, pi. 796, 



figs. 6-9. 



73. ,, tetragona, Mich. (^ T. gracilis, d'Orb., I. c, p. 1056, 



pi. 796, figs. 10-14; I. c, p. 1059, pi. 798, fig. I.). 



1821. Genus Apsendesia, Lamx.^ 



Under this genus Dr. Pergens places as synonyms the following- 

 genera : — Radiofascigera, Unitubigera, Radioiubigera, Discotubigera, Actino- 

 pora, and Multituhigera, all d'Orbigny's. Species belonging to this 

 genus are not abundant in the Chatham Chalk. 



74. Apsendesia papyracea (Unitubigera), d'Orb., 'Terr. Cret.,' p. 761, 



pi. 643, figs. 12, 14. 



75. ,, organizans (Lichenopora), icL, d'Orb., pi. 046, figs. 9-13; 



Radiotubigsra, I. c, p. 757. 

 70. ,, regularis, d'Orb., I. c, p. 763, pi. 763, figs. 7-9. 



1823. Genus Lichenopora, Defrance. 



77. Lichenopora (Bicavea) urnula, d'Orb., I. c, p. 956, pi. 776, figs. 1, 2. 



78. „ sp. 



I have found fragments of other forms of Lichenopora, but not 

 sufficiently distinct for identification. 



' There is also in Mr. Gamble's collection a pseudomorph in flint of IIomcBOSoUn, 

 ramulosus, Lonsd. 



" See Dr. Pergens, Itevis. dcs Bryo:., p. 381. 



