10 Mr. S. V. WoocFs Catalogue of the Zoophytes from the Crag, 



granules which are usually regularly arranged. There is some 

 difference in their form at different stages, as well as in the differ- 

 ent species of Fucus. Figs. 9, 10, 11 represent those of i^. vesicu- 

 losus ; fig. 12 those of F. nodosus. 



The presence of these bodies being so constant, it is not un- 

 reasonable to suppose that they perform some important function. 

 Those who believe that impregnation is necessary in cellular 

 plants, in the same sense at least as in the higher tribes, may 

 probably consider that they are representatives of the anthers, 

 and perform similar functions. 



A few attempts were made for the purpose of ascertaining if 

 they would germinate, by treating them in the same way as the 

 basisperms of F. canaliculatus already mentioned. The experi- 

 ments failed, and the difficulty seems to be to preserve tlie water 

 at a proper and uniform temperature, for, owing to the delicacy 

 of their structure, they are easily affected by changes. I believe, 

 however, that they afford one means by which the Fuci are pro- 

 pagated, for the reason that the structure of the reproductive or- 

 gans of Alaria, Laminaria, &c. is essentially that of acrosperms : 

 this will be more particularly alluded to in a subsequent paper. 

 The true species of Fucus may be considered as heterospermous, 

 and it will be shown afterwards that other genera are hasispermous 

 and others acrospermo'us. 



[To be continued.] 



III. — Descriptive Catalogue of the Zoopjhytes from the Crag. 

 By S. V. Wood, Esq., F.G.S. 



Mr. Richard Cowling Taylor, in a very valuable paper upon 

 British " Antediluvian Zoology and Botany," communicated to 

 the ' Magazine of Natm-al History' in 1830, was, I believe, the 

 first to draw attention to the variety and interesting forms pre- 

 sented by the Corals of the Crag, and many very good figures 

 are given by him in the above periodical, but unaccompanied by 

 generic or specific characters. 



In the following Catalogue I have endeavoured to furnish a list 

 of these Polypifera, which are principally derived, as might be 

 expected, from the deposit that has been termed par excellence 

 " Coralline" Crag. This formation in the neighbourhood of 

 Orford presents a close analogy to some of the coral reefs now 

 forming, being composed almost entirely of corals, and suffi- 

 ciently indurated to serve as a building-stone. 



Among the corals of the crag we are presented with as great 

 anomalies as among the Mollusca ; recent species strictly British 

 being associated with genera wholly unknown in a living state, as 

 for example, Fascicularia and Theonoa. Although inferences re- 



