6 THE NAUTILUS. 



jetties were great numbers of Siphonaria naufragum Stearns (S. 

 lineolata d'Orb. ). One thing that seemed to impress me more 

 than when I lived there, was the great abundance of oysters on 

 all the rocks, even around the water battery of the fort and also 

 on the piling. In speaking to an old friend regarding the 

 matter, he said he thought that around the fort it was due to 

 cleaning off the rocks a few years ago, thus presenting a clean 

 surface for the young to cling to. This array of bristling 

 oysters around the water battery of the fort deterred me from a 

 hunt for Nerita peloronta and N. versicolor (5), three living speci- 

 mens of which I found there together with Litorina angulifera, 

 being the most northern record for the three species. 



Cerithidea scalari/ormis Say (6). The only place that I ever 

 found this species at St. Augustine was in the more sandy por- 

 tion of the marsh west of the city between King street and 

 Orange street, not far from where the Y. M. C. A. building now 

 stands. The filling-in of the marsh has probably locally ex- 

 tirpated this species. Another related species Cerithium fiori- 

 danum Morch (7), C. atratum of my list, was also restricted 

 to a small area, an old oyster bed at the west end of Marsh 

 island. This is now a sand bar and the species may now be 

 entirely absent in the harbor. At the latter place I also found 

 my only living example of Murex fulvescens Sowb. (M. spini- 

 costata Val. ). 



At the mouth of Hospital creek was a large patch of the 

 grass-like Gorgonia Leptogorgia virgulata. On this lived the 

 little Simula uniplicata Sowb. 8 ( Ovula uniplicata) , as the Gor- 

 gonia varied in color so did the shells of the Simnia, agreeing in 

 color with the bunch of Gorgonia on which they were found 

 either white, light-yellow, orange or pink. On one occasion 

 while hunting for Simnia a conspicuous object attracted my at- 

 tention, its flesh-colored mantle with irregular blackish mark- 

 ings was very striking, and as it contracted I found I had a 

 Oyphoma gibbosa Linn. (Ovula gibbosa), common to the West 

 Indies. For some time I wondered why the animal of this 

 shell should be so very conspicuous; then the thought occurred 

 to me that in more southern waters probably most of them live 

 on the " sea-fans" (Rhipidogorgia flabellum) and with their 



