THE NAUTILUS. 29 



Other opposite the sand bar, and liere the constant tidal current has 

 excavated a little circular bay, covering two or three acres. This 

 bay and the breakwater, with another little bight not much over 

 thirty feet across, furnished nearly the only good collecting ground 

 on the island. Otherwhere I found only a few of those hardy 

 shells capable of standing any amount of buifeting by the waves, 

 Chitons and Limpets, an occasional Chlorostoma, and the Monoceros 

 luguhre Sby., which is in evidence along the whole coast from 

 Ensenada south. 



Dredging at moderate depths gave little results, but some of my 

 fishermen friends who spend much time about this island, which 

 furnishes some of the great fishing of the coast, make a practice of 

 bringing up to me rocks which they haul up on their lines from con- 

 siderable depths, attached to kelp roots. I am, therefore, able to 

 list a considerable number of deep-water species. It has seemed to 

 me advisable to publish the following list of shells secured from this 

 small island and its immediate vicinity as a contribution to our 

 knowledge of geographical distribution. I have to thank Dr. Wm. 

 H. Dall of the National Museum, and Mr. Henry Hemphill of San 

 Diego, Cal., for determining a very large share of the species about 

 wiiich I was in doubt. 



After commenting on the fact that many of the specimens which 

 I sent to him were too young or too worn to be identified specifically, 

 Dr. Dall writes, " There was a small Rissoina among the shells 

 which we have had for some years from San Pedro, but had not 

 named, and with your permission we propose to call it R. Bakeri, 

 Dall and Bartsch. There are also some of the new Pyramidellid(S 

 described in the paper on W. Am. Pyramidellidce which Mr. Bartsch 

 and I have in preparation." 



Our return trip was made much more slowly than the outward 

 one, as the prevalent wind made it a long tack to windward. The 

 only break was a night run against a sharp storm to make the 

 doubtful shelter of Santo Tomas, where we lay for twenty-four 

 hours with two anchors out, estimating the chances of a shift of the 

 wind driving us to sea again. Our cruise lasted seventeen days, and 

 was unanimously voted a success. , 



