THE DEVELOPMENT OF HOLOTHUKIA FLOEIDANA 



POUETALES WITH ESPECIAL KEFEKENCE TO 



THE AMBULACRAL APPENDAGES. 



BY 



CHARLES LINCOLN EDWARDS. 



Trinity College, Hartford, Connecticut. 



CONTENTS. 



PAGE 



I. Introduction 211 



II. Notes on the General Embryology 213 



III. Tentacles 216 



A. Discussion of Literature 221 



IV. Pedicels and Papillae 222 



A. Discussion of Literature 227 



V. Literature Cited 228 



VI. Explanation of the Plates 230 



I. Inteoduction. 

 During the summer of 1888, at Green Turtle Cay, Bahamas, 1 

 studied the ontogeny of Holothuria floridana Pourtales. For the 

 identification of the species I relied at that time upon the labelled 

 specimen in the Museum of the Biological Department of the Johns 

 Hopkins University, and thus in my preliminary notice (1889) the 

 form appeared under the name of Miilleria agassizii Selenka. In 

 recent papers (1905, 1908) I have shown that this sea-cucumber, 

 common from Florida through the Bahaman, West Indian, and 

 Caribbean regions to the northern coast of South America, is 

 Holothuria floridana Pourtales, with which Holothuria mexicana 

 Ludwig, and Holothuria africana Theel, are identical. In addition 

 I have established the fact that Holothuria atra Jager, generally 

 distributed throughout the Indo-Pacific regions, is a distinct species, 

 and I defined for each of these species the differential characters, 

 some of which had not been previously described. 



The JouenaIj of MORrHOLOOT. — Vol. XX, No. 2. 



