ON FOSSIL POLYZOA. 151 



surface porous. Zpcecia disposed in radiating lines, consisting of one or 

 more series, on the free extremity of the stem or lobes.' — Hincks, p. 481. 



138. Domopora stellata, Goldf. ; Hincks, p. 481 ; Goldf. ' Petrefac' 



i. p. 39, pi. xxx. tig. 12 = Stellepora stellata, Hag. ' Bry. Maest.' 

 p. 44 = Defrancia stellata, Reuss, ' Foss. Pol. Wien. T.' 37, 

 pi. vi. fig. 2 ; Manzoni, ' Bri. Foss. Mioc. d'Aust.' 

 Range. — 'In stratis arenoso-margaceis,' Westphalia? (Goldf.) ; Austro- 

 Hung. (Manzoni) ; Vienna Basin (Reuss). 



139. Defrancia disticha, Hagenow (a with smooth interspaces), 



Tab. IV. fig. 1. 



140. Defrancia Michelini, „ ,, ,, ,, 



Tab. IV. fig. 5. 



141. Defrancia cochloidea, „ „ ,, „ 



Tab. IV. fig. 8. 



142. Defrancia diadema, Goldf. (/? with porous interspaces, Hag.), 



Tab. IV. fig. 23 =Oeriopora ibid., Goldf. 



143. Defrancta reticulata, Hag. (/? with porous interspaces, Hag.), 



Tab. IV. fig. 4. 



1 44. Defrancia cariosa, „ „ ,, ,, 



Tab. IV. fig. 6. 



145. Defrancia sellula, „ „ „ ,, 



Tab. IV. fig. 7. 



Range. — The first and fourth of Hagenow's species are found both 

 at Maestricht and Falkenberg, the rest are Maestricht. Busk, ' Brit. Mas. 

 Cat ' pt. iii. p. 35, gives D. truncata, Jameson, as a Recent Northern form, 

 and he gives Geriupora stellata, Goldf., as a synonym. 



This is the end of the classification of the Cyclostomata, so far as 

 Mr. Hincks gives any details. But Mr. Busk, in his ' III. Brit. Mus. 

 Catalogue,' admits the following. 



Family VI. Frondiporidjj, Smitt. 



= Fascicidinece and Fascigerida, D'Orb.; Frondiporidce and Corymboporida;, 

 Smitt ; Cerioporida;, Busk ; Gerioporina, Hagenow. 



' Zoarium massive, stipitate, simple or lobed, or ramose. Zocecia 

 connate, aggregated into fasciculi, and continuous throughout the length 

 of the fasciculus, at the extremity of which only they open ; walls of 

 cells porous ; no intermediate pores or cancelli.' 



Fascictlipora, sp., are found in the Jurassic strata, and Frondipora 

 also are probably as old as the Chalk ; but in this Report I can give no 

 details respecting the species. 



Part II. — Historical Labours on the Group. 

 Cretaceous Polyzca (Pt. ii. Foreign Species). 



See Cretaceous Polyzoa (Pt. i. Brit. Species), Brit. Assoc. Rep. Foss. 

 Polvz. (mihi), 1883. 



It is impossible at the present time, and with our present knowledge, 

 to comprehend the full meaning of the grouping of the Fossil Polyzoa by 

 the older naturalists. The genera were few in number and not always 

 well defined, so that the history of any special group is, comparatively 

 speaking, the history of advancing knowledge — not, however, based upon 



