404 



REV. H. D. TRISTRAM ON BERMUDAN MOLLUSKS. [DeC. 10, 



How clearly hare the ocean currents registered their course in this 

 fact. Although Bermuda is out of the course of the gulf-stream, 

 lying as it does some fifty miles to the south-east of any perceptible 

 current, yet it is not beyond its influence, as may be seen by the most 

 casual observer in the masses of tangled gulf-weed which are washed 

 on its shores. But beyond the gulf-stream to the westward, the 

 polar current, narrowed indeed, but very perceptible, runs along the 

 shores of Virginia, assimilating its marine fauna to that of New York, 

 and chiUing the life of those lovely corallines and zoophytes which 

 have extended their range, under the fostering of the more genial 

 gulf-stream, from the Bahama banks to the reefs of the Somers 

 Islands. 



It were much to be wished that some enterprising marine zoologist 

 would undertake the examination of the reefs of Bermuda, and let 

 down his dredge in the almost unvisited depths of Castle Harbour, 

 and on the sandy surface of the great bank which extends for many 

 miles to the southward, commencing at about thirty miles from the 

 land, and running from east to west. On this bank the Grouper 



(Serranus ?), the cod of the Bermudas, is no less abundant 



than its northern representative off the islaiid of Rockall. 



Catalogue of the Mollusca of Bermuda. 



Spirula fragilis. Lam. 

 Strombus pugilus, Linn. 

 Ranella caudata. Say. 

 Murex ■ ? 



? 



Pisania turbinella, Kiener. 

 Triton lotorium, L. 



femorale, L. 1 



lanceolatus, Menke. 



tessellatus. Reeve. 



chlorostoma, Lam. 



Mangelia 1 



Buccinum plumatum, Brug. 



nucleus, Brug. 



• olivaceum, Brug. 



ambiguum, Billw. 



Nassa ? 



Terebra hastata, Kiener. 

 Purpura deltoidea, Lam. 



bicostalis. Lam. 



undata, Lam. 



Planaxis semisulcata, Sow. 

 Cassis testiculus, L. 

 Dolium perdix, L. 

 Columbella mercatoria, Lam. 



Columbella cribraria. Sow. 



nitidula. Sow. 



concinna. Sow. 



Oliva fusiformis. Lam. 



reticulata, Lam. 



nivea, Gmel. 



Olivella eburnea. Lam. 



jaspidea, Gm. 



oryza. Lam. 



buUula, Soiu, 



Conus mus, L. 



aurantius, Brug. 



verrucosus, Brug. 



nebulosus. Sow. 



daucus, Sow. 



Mitra striatula, Lam. 

 Marginella pallida, Lam. 



avena, Val. 



varia. Sow. 



Cyprsea cinerea, G>«. 



rotunda, Sag. 



Trivia quadripunctata. Gray. 



pedicula, L. 



Ovulum gibbosum, L. 

 Natica canrena, L. 



clausa. Sow. 



dillwynii, R6cluz. 



