Proboscidea leeches Clepsine oomplanata and C. biooulata 

 (genus Glossosiphonia, according to the current terminol- 

 ogy). 13 



Adolf Edward Grube* 4 was born in 1812 in Konigsberg, 

 where he graduated from the university. For thirteen years 

 C1843 - 1865) he was professor of zoology and comparative 

 anatomy in Dorpat University, and to this period of Grube's 

 life are related his most important works in systematics, 

 anatomy, and embryology of the annelids. 



Grube's work undoubtedly possesses remarkable signifi- 

 cance. Because it was undeservedly forgotten and not 

 mentioned even in the detailed reports and special works on 

 the development of leeches (127), we must dwell here on its 

 content. 



In the introduction to his work, Grube turned to 

 memories of his years of study in Konigsberg, where Baer 

 was working. Actually the great embryologist at that time 

 read few lectures, being engrossed in the investigations 

 of development of fish and amphibia. He was helped by 

 Grube's friend, the clever graphic artist Burov, who, by 

 the way, encouraged Grube's attraction to the laboratory, 

 where the latter acquired a taste for embryological 

 investigations. Grube was aware of the difficulty of these 

 observations, but he did not abandon his idea of devoting 

 himself to embryology. 



Shortly after graduation from the university, Grube 

 left for a trip to the Mediterranean seacoast. "Baer's 

 observations on the history of animal development," Grube 

 wrote, "accompanied me on the trip to Italy, and along with 

 the enjoyments of nature and art I continuously sated my 



13. A. E. Grube, UNTERSUCHUNGEN UBER DIE ENTWICKLUNG 

 DER ANNELIDEN. I: UNTERSUCHUNGEN UBER DIE 

 ENTWICKLUNG DER CLEPSINEN (Konigsberg, 1844), 



ii + 56 pp. 



14. The author expresses heartfelt gratitude to the head 

 of the Department of Zoology at the University of 

 Tartu, Professor Kh. Kh. Riikoya, for the photo 

 reprinted here of A. E. Grube. 



518 



