No. 1. — Reports on the Dredying Operations off the West Coast of 
Central America to the Galapagos, to the West Coast of Mexico, 
and in the Gulf of California, in charge of ALEXANDER AGASSIZ, 
carried on by the U. S. Kish Commission Steamer “ Albatross” 
during 1891, LiEUT. COMMANDER Z. L. TANNER, U.S. N., 
Commanding. XXIX. 
AND 
Reports on the Scientific Results of the Expedition to the Tropical 
Pacific, in charge of ALEXANDER AGASSIZ, on the U. S. Fish 
Commission Steamer * Albatross," from August, 1899, to March, 
1900, COMMANDER JEFFERSON T. MOSER, U.S. N., Commanding. 
NE 
Reports on the Cephalopoda. By Wıruıam E. Hoyrir. 
Tue collection made by the “ Albatross” during 1891 came into my 
hands in the year 1892. In the summer of 1893 I took the specimens to 
Copenhagen and spent some time studying them in the Zodlogical 
Museum of that city. I had then the pleasure and privilege of discuss- 
ing the more interesting forms with the doyen of students of Cephalopoda, 
Professor Steenstrup, and with his assistant, Dr. Posselt. Both these 
have since died, but the memory of their ready sympathy and helpful 
counsel remains and is here gratefully acknowledged. I have also re- 
ceived assistance from my friend Dr. Georg Pfeffer, for which I beg to 
tender him my sincere thanks, 
Some preparations of the luminous organs of Abraliopsis were exhibited 
at the meeting of the German Zo logical Society at Gottingen in 1893, 
and also at the British Association in Nottingham in the same year, but 
after that, owing to the claims arising from the charge of a rapidly 
growing museum, no further progress was made for some years. 
The collection consists of thirty species (including a few forms to 
which I have not found it possible to affix names), distributed in nine- 
teen genera, one of which (Froekenia) is new. Another (Pterygioteuthis) 
VOL, XLIII, — NO. 1 
