On the ''HasslerT i6i 



unfold its arms. In describing his sensations of de- 

 light to Professor Peirce he said : " I could see, 

 without great effort of the imagination, the shoal of 

 Lockport teeming with the many genera of crinoids 

 which the geologists of New York have rescued from 

 that prolific Silurian deposit.'* 



A landing was made at Monte Video when Agassiz 

 examined the geology of the bay, and after dredging 

 off the Rio de la Plata, another stop was made at 

 Port San Antonio, in which place some fine fossils of 

 the Tertiary time were found. Here Agassiz saw his 

 first guanaco. Off the Gulf of St. George many 

 beautiful forms among the star-fishes were taken, 

 the dredge at one time coming up filled with Ophi- 

 urans. At Possession Bay the party landed and made 

 a study of the old moraine. At the Elizabeth Islands 

 and San Magdalena, Agassiz observed for the first 

 time a penguin rookery, obtaining fine specimens of 

 the birds. At Glacier Bay he visited the glacier that 

 comes down here, and is a mile across its front, 

 formed of clear blue ice. A forest was growing out 

 of the old terminal moraines, and in the face of the 

 glacier was a huge cave thirty or more feet high and 

 about one hundred feet deep. 



An unsuccessful attempt was made to trace this 



glacier to its source, its upper portion branching off 



into many small streams of ice. The rate of advance 



was found to be ten inches a day ; indeed, this 



glacier was examined by Agassiz with all the care 



and interest that he had given to similar phenomena 



in Switzerland ; the fact that he could compare the 



two making the investigation of especial interest, 

 II 



