XIII 



REPORT UPON THE RESEARCHES OF PROF. MULLER 



INTO THE ANATOMY AND DEVELOPMENT OF THE 



ECHINODERMS. 



Annals and Magazine of Natural Histoiy, ser ii. vol. viii., 1851,//. 1-19 



1. Miiller, Johann. Ueber die Larven unci die Metamorphose der Ophiuren. Trans- 



actions of the Berlin Academy, 1846. 



2. Miiller, Johann. Ueber die Larven und die Metamorphose der Echinodermen. 



Ibid. 1848. 



3. Miiller, Johann. Ueber die Larven und die Metamorphose der Holothurien und 



Asterien. Ibid. 1849-50. 



4. Miiller, Johann. Anatoinisch Studien iiber die Echinodermen. Midler's Archiv, 



1850, Heft. ii. 



5. Miiller, Johann. Berichtigung und Nachtrag zu den anatomischen Studien iiber die 



Echinodermen. Ibid. Heft iii. 



6. Miiller, Johann. Fortsetzung der Untersuchungen iiber die Metamorphose der 



Echinodermen. Ibid. Heft. v. 



7. Miiller, Johann. Ueber die Ophiuren-larven des Adriatischen Meeres. Ibid. 



1851. Heft i. 



We purpose in the present article to give some account of the 

 results at which the illustrious author of the works whose titles are 

 prefixed has arrived, in the course of a series of elaborate and 

 patiently conducted researches in one of the most remarkable and 

 most obscure provinces of zoological and physiological science. It is 

 a province, too, in which Professor Miiller is at once Columbus and 

 Cortez. The discoverer — he has gleaned all its riches. For it so happens 

 that Sars, the only investigator who preceded him in the study of 

 the development of the Echinoderms, had not the good fortune to 

 meet with instances of the ordinary course of development, but only 

 with a case, exceptional among the Echinoderms, but differing less 

 from the embryogenic phaenomena of other animals. 



Nor are we indebted to the Professor for a widening of our embryo- 



