254 



PLEISTOCENE MOLLUSCA FROM THE RAISED BEACH DEPOSITS 

 OF PERIM ISLAND. 



By the Rev. R. Ashington Bullen, F.L.S., etc. 



Read lith June, 1901. 



The shells named in this paper were collected by Mr. J. A. Rupert 

 Jones, R.N.R , Assistant Harbour Master, etc., at Perim Island. 

 They are all from the expanse of raised beach known as ' Sheikh 

 Berkhud ' (so-named from the tomb of that Mahometan saint which 

 stands near the northernmost sandpit on the north side of Perim 

 Island). The raised beach is about 20 feet above low-water mark. 



One large Tridacna, not forwarded, measured 18 X 10 inches and 

 rather over an inch thick. The raised beach is a flat level plain of 

 coral formation, extending inland to tbe basalt hills, 203 feet in 

 height, and is covered in places with patches of low scrub. 



Among the specimens received are two recent ones which were 

 probably blown inland during storms ; at any rate, they show no 

 evidence of having been an integral part of the raised-beach deposit, 

 being quite without the breccia-matrix which distinguishes the rest of 

 the collection. 



Mr. R. Bullen Newton, who has so recently worked over the 

 whole of the literature and collections of the raised-beach deposits of 

 the Red Sea area in the British Museum, 1 has very kindly looked over 

 my specimens, and as a result seven hitherto unrecorded Pleistocene 

 species are now added to those already known. They are Comis 

 striatus, Natica mammilla, Lamprostoma flammulatus, Vertagus obeliscus, 

 V. vulgaris, Barbatia setigera, and Lima squamosa. My best thanks 

 are due to Mr. Bullen Newton for the trouble he has taken. 



LIST OF MOLLUSCA FROM PERIM ISLAND. 2 



Bulla ampulla (Linn.). Conus virgo, var. emacialus, 

 Canarium gibherulum (Linn.). Reeve. 



,, dentatum, var. cry- Cyprcea crosa, Linn. 



thrinum (Chein.). Fusus poly gono ides, Lanik. 



Cerithium Rxuppeli, Philippi. Mclongena ( Volema) paradisiaca, 

 Comis fiavidus, Lamk. Reeve. 



* ,, striatus, Linn. Nassa pulla, Linn. 



1 Geol. Mag., n.s., dec. iv, vol. vii, Nov. and Dec , 1900. 



2 New records art marked with an asterisk. 



