No. 2. — BibliogfrcqjJiT/ to accompany " Selections from Emhryological 

 Monographs " compiled hy Alexander Agassiz, Walter Faxon, 

 and E. L. Mark. 



II. t 



ECHINODBRMATA. 



By Alexander Agassiz. 



It will greatly facilitate the study of the history of the development of Echino- 

 dernis by recalling here that in 1836, Tliompson (J. V.) first called attention to the 

 remarkable development of Comatula ; that next came in 1844 the observations of 

 Sars (M. ) on the direct development of Echinaster, and in 1846 of Asteracanthion. 

 This was followed in 1848 by the confirmation of these observations by Desor and 

 Agassiz (L.) In 1847 Dufosse traced many of the stages of development of Echinus 

 esculentus. From 1846 to 1855 Johannes Miiller published his memoirs on the devel- 

 opment of the different orders of Echinoderms. They have formed the basis of all the 

 subsequent publications on the same subject. The more important of these in their 

 chronological order are those of AUman, Carpenter, Thomson (C. W.), and Goette on 

 the Embryology of the Comatulae ; of Krohn, Agassiz (A.), and Metschnikoff on the 

 Embryology of the Sea-urchins ; of Koren and Danielssen, Baur, Metschnikoff, and 

 Selenka on the Holothurians ; of Schultze, Agassiz (A.), Metschnikoti', and Apostoli- 

 des on the Ophiurans ; and of Van Beneden, Agassiz (A.), and Metschnikoff on the 

 Starfishes. While the memoirs of Miiller, Agassiz (A.), Metschnikoff, and others 

 treated of Tornaria as a Starfish larva, the subsequent publications of Metschnikoff 

 and of Agassiz (A.) proved that Tornaria was the larva of Balanoglossus. The litera- 

 ture of this part of the subject is, therefore, repeated here ; it will also appear in that 

 of the Vermes, to accompany the illustrations of Balanoglossus. It is taken for 

 granted that no special record is necessary of the older Jahresberichte of Leuckart, 

 of Keferstein, of the Zoological Record, and of the recent Berichte of Hoffmann and 

 Schwalbe and of Carus ; and that such observations as are found in the notices and 

 reviews of special memoirs must be sought for in the chapters on Echinodermata of 

 these volumes. [*] before a title denotes that I liave not seen the work'. 



Cambridge, July 1, 1882. 



Agassiz, Alexander. 



On the Embryology of Asteracanthion herylinus Ag. and a Species allied to 

 A. rubens M. T. Asteracanthion pallidus Ag. Proc. Amer. Acad. Arts ^ 

 Set., VI. pp. 106-114. 18 figs. 1863. 

 Also separate. 1S63. 8 pp. 



+ I. Crustacea, by Walter Faxon. See Bull. Mus. Comp. Zool., IX. No. 6, p. 197, 

 March, 1882. 



VOL. X. — NO. 2. 1 



