ml:;m;m of comparative ZO&LOCH 11 



These different publications comprise one volume and eleven 

 numbers of the Bulletin, and one volume and two numbers of the 

 Memoirs. 



The Plates for Professors Milne-Edwards and Bouvier's Me- 

 moir on fche Galathoidae have been completed, and, as soon as the 



have been revised by the authors their Monograph ean be sent to 

 the printer. 



The Plates to accompany Dr. Goes's memoir on the Porami- 

 nifera of the 4C Albatross" Expedition of 1891 are in his hands for 

 revision, and the text has been sent to the printer. Dr. Miilier\s 

 Report on the Ostracods is in the hands of the binder. 



Excellent progress is making with the Monograph of Messrs. 

 Wachsmuth and Springer on the Orinoidoa Camcrata of North 

 America. Over 800 pages have been east, and 50 Plates have 

 been printed. 



Mr. Garman is making good progress with his memoir on the 

 Deep-Sea Pishes of the <; Albatross" Expedition of 1 801. About 20 

 Plates have been finished. 1 have myself prepared the greater 

 part of my Report on the Echini of the same Expedition. It will 

 he Illustrated by at least 25 Plates, which will be taken in hand by 

 Mi-. Westergren as soon as the Plates for the Fishes are out of his 

 hands. Dr. Mark reports that he has made fair progress with his 

 Monograph of the remarkable deep-water Cerianthoid procured by 

 the "Albatross." 



1 have also received the manuscript of the Report of Dr. Otto 

 Maas on the Acalephs of the "Albatross" Expedition of 1891, 

 to be accompanied by 15 Plates which arc now in the hands of 

 Messrs. Werner- and Winter. 



Professor Goode writes me that the Report on the Deep-Sea 

 Fishes of the Western Atlantic })y himself and Dr. Dean, which 

 contains the "Blake" collection of Fishes, is in the hands of the 

 printer. 



In connection with my investigations on the Coral Reefs of the 

 West Indies, and of the " Albatross " Expedition of 1891, Pro- 

 fessor U. T. Hill of the United States Geological Survey has with 

 the consent of the Director, made an extended exploration of the 

 Isthmus of Panama, with a view of determining as far as is practi- 

 cable the period at whieh the Isthmus of Panama was elevated, 

 and when the connection which once existed hetween the Gulf of 

 Panama and the Caribbean Sea ceased to exist. He was greatly 



