NOTICE. 



According to the arrangement sanctioned by H. M. Stationery Office and explained 

 in the Preface, the following six Memoirs have been bound in a temporary volume, 

 without reference to their subjects ; in the order in which they were ready, letterpress 

 and plates together, for the binder. 



I regret that the first Memoir, that by Mr Thomas Davidson on the Brachiopoda, 

 is not much longer. I am greatly surprised that so many casts of the dredge in deep 

 water, extending over so long a course, should have added so . few novelties to this 

 curious group. I only wish it had been in our power to put thousands more into Mr 

 Davidson's skilful and generous hands. 



I had hoped also that Dr v. Kolliker might have found time to undertake a larger 

 share of the work ; we must only congratulate ourselves on having received, even to a 

 limited extent, the assistance of so high an authority. 



Dr George Brady, having completed his valuable account of the Ostracoda, has 

 kindly undertaken the description of the Copepoda of the Expedition ; an arduous task, 

 on account of the constant use which was made of the tow-net. 



I am glad to be able to say that Professor Turner's interesting Memoir on the 

 Whales is only an instalment, and is to be followed by a description of the Seals, and of 

 the Human remains. 



Before we left England, Dr Kitchen Parker told me that he was anxious to 

 procure a series of the embryos of a Chelonian reptile, to enable him to make a 

 study of the development of the head in that peculiar type. When we called 

 at Ascension, as it was the breeding season of the Green Turtle, we made a 

 considerable collection of the young, and Mr Moseley prepared a series of embryos, 

 taken from the egg in difi"erent stages. These were handed to Dr Parker ; he found, 

 however, that one or two developmental stages were still wanting to complete the 



