MEETINGS. 109 



thrown up by a people who could not make or use mortar, yet 

 they are improvements upon the original earthen enclosures. 

 They occur in two districts in which the inhabitants had been 

 brought in contact with Roman walled enclosures, but main- 

 tained their independence of the great conquerors. Having 

 learned from forest fires the means of producing vitrification, 

 they employed it to make their camps resemble, to that extent, 

 the Roman towns enclosed by walls. The paved causeways are 

 copied from the Roman military roads. The custom of 

 constructing such enclosures did not last long ; the same camps 

 may afterwards have been occupied during the Saxon and 

 Scandinavian invasions. 



Information is requested on those existing in Brittany : — 

 (1) Are they always on high ground ? (2) Do they ever occur 

 far from the sea? (3) Are they always ellipitical ? (4) 

 Have the stones composing the ramparts been first broken into 

 small fragments ? (5 ) Is the vitrification complete or partial ? 

 (6) Is it on the outside or top of the rampart only or also on 

 the inner slope ? 



An animated discussion took place on this subject thus 

 brought for the first time under the consideration of members. 



Mr. Collenette then gave particulars of the " Casts of the 

 gigantic eggs of certain extinct birds " which have recently 

 been added to the museum. 



[No meeting was held in March, as the Guille-Alles 

 Concert took place on our usual evening.] 



Monthly Meeting held April 16th, 1902. 



The Secretary reported that Mr. E. D. Marquand had 

 discovered Isoetes growing on the cliffs of Alderney, and 

 had forwarded specimens. This is a most interesting find, 

 Guernsey having been the furthest north and the only 

 station for this curious Quill-wort in this district. In 

 Guernsey it was originally discovered on L'Ancresse Common, 

 but Mr. Derrick has found it also at the Guet (Catel Parish), 

 on the coast towards Houmet, and on the cliffs at Petit Port. 



Rev. R. Tourtel read a paper on the names of creeks, 

 rocks, &c, round Herm ; it proved unusually interesting and 

 will be published in the Transactions. 



Mr. W. A. Luff exhibited some nearly full-grown larvas 

 of the Jersey Tiger Moth, Callimorpha Hera. They had been 

 reared from the egg by Mrs. Boley. 



