A. Lakaz^Dyutbe (molluscs), P. Leikart (parasitic worms, 

 insects), S, Loven (hydroids, annelidae, molluscs), A, Miln^ 

 Edwards (parasitic worms, annelidae, crustecea, arachnida) , 



I. Muller (planariums, eckinodermata) , M, Sars (medusa, 

 annelidae, molluscs, echinodermata) , J, Tomson (Crustecea), 

 K. Fogt (molluscs) M, Shultse (annelidae, molluscs, 

 echinodermata) and many others (516) , 



(127) In the manual of Balfour (F. M. Balfour. A 

 treatise on comparative embryology, London, 1880) , there are 

 extremely honest works, in which the embryologists were 

 given places in accordance to their services. The work of 

 Grube was mentioned twice in the list of literature, but in 

 the text there was no reference to it. K. N. Davydov in both 

 editions of his "Course of invertebrates embryology" (1914 

 and 1928) completely forgot about Grube and the chapter about 

 the development of leeches started by the words: "Systematical 

 study of leeches embrology started at the beginning of the 60s 

 (Rathke, 1882, p, 162)". Rathke himself in the article, which 

 was mentioned by Davydov (H. Rathke, Beitrage zur Entwickelungs- 

 geschichte der Hirudineen. Leipzig, 1862, IV + 116 S., 4°), 

 only causally cited Grube 's work. His reader did not try to go 

 deep into the origin of the investigations of Grube; therefore, 

 it was possible to form an impression, that Rathke namely was 

 the pioneer of the study of the ring worms embryology. The 

 same relation to the scientific services of Grube was also 

 maintained by many late investigators for example, B. V. 

 Sukachev (Beitrage zur Entwickelungsgeschichte der Hirudineen. 



II. Uber die Furchung und Bildung der embryonalen Anlagen bei 

 Nephelis vulgaris, Zts. wiss. Zool., 73, 1903, S. 321-367). 



G. A, Schmidt was an exception, He referred more than once to 

 the works of Grube (for example, in article "Development of 

 endoderm in Protoolepsis tesselata" . Dnevn. Zool. otd, 

 obshchva lyub. est. antr. i eti., IV, No. 1, 1917, pp. 1-22), 

 although he did not reveal in these references the whole 

 significance of investigations of Derptsky embryologist (518) . 



(128) This aspect of the activities of Nordmaim was 

 reflected in his booklet "Description of imp. Odessa botanical 

 gardens and his view on vegetation and climatic relations of 

 the environs of Odessa". Odessa, 1847, 43 pages (530). 



650 



