Morphology of the Golgi Apparatus in the Common Limpet 



145 



substance chromophobe), tout a fait distinct du 

 chondriome et du « vacuome ». 



La question reste posee de savoir si rappareil de 

 Golgi, organite constant de la cellule des Metazoai- 

 res, existe chez tous les Protozoa ires. Nous inclinons 

 a penser qu'il n'est pas present chez tous; nous 

 n"avons pu le decouvrir chez des Flagellcs tcls que 

 les Oxymonadidae. Mais Temploi systematique du 

 microscope electronique le revelera peut-ctre dans 

 des organismes ou il avait echappe au microscope 

 optique, tel est le cas des Infusoires cilies, ou une 

 de nos eleves, Madame Noirot, vicnt de le decouvrir 



chez un Entodinimn (Inl'usoire Ophryoscolecidae) 

 (observation inedite), avec la meme structure qu'un 

 parabasal, mais rclatisL-mcnt plus petit. 



BiBLIOGRAPHIE 



1. DuDoscy, O. et Grassi'. P. -P., Conipt. rend. acad. sci., 



Paris, 180, 477 (1925). 



2. — Arch. -ool. expll. et gen. 73, 381 (1933). 



3. Grasse, P.-P., Conipt. rend. soc. tiiol., Paris 93, 1097 (1925). 



4. — Arch. zool. e.xptl. et gen. 65, 345 (1926). 



5. ~- Conipt. rend. acad. .sci., Paris, 242, 858 (1955). 



6. Grasse, P.-P. et Carasso, N., Natitre 179, 31 (1956). 



7. Janicki, C, Biol. Zentr. 31, 321 (19 11). 



The Morphology of the Golgi Apparatus in Neurones and Epithelial 

 Cells of the Common Limpet Patella vulgata 



D. Lacy 



Depart iiu'iit of Zoology and Comparative .Anatomy, St. Bartholomew's 



Medical College, London 



Widely different views are held about the mor- 

 phology of the Golgi apparatus in cells of molluscs 

 (2. 11, 8). The following is a summary of work 

 carried out to determine the morphology of the 

 Golgi apparatus in neurones and epithelial cells of 

 the common limpet. Patella vidgata. The neurones 

 studied were from the pedal, pleural and visceral 

 ganglia. The epithelial tissue lies adjacent to the 

 ganglia. 



As revealed by Kolatchev's method (5) the Golgi 

 apparatus in neurones of the limpet consists basi- 

 cally of a system of black filaments. In most cells 

 the filaments anastomose to form networks of \arious 

 complexity (hg. 1 ). In relatively few cells the\ remain 

 discrete. Associated with some of the networks and 

 some of the discrete filaments is a weakly osmio- 

 philic substance. In small cells (about 5 // in dia- 

 meter) the networks arc confined to a small region 



Fig. 1. Photomicrograph of a neurone treated according to Kolatchev's tech- 

 nique. Magnification 1700. 



Fig. 2. Electron micrograph of a very small and possibly young neurone 

 about 5 fi in diameter. The Golgi apparatus is a small compact inclusion lying 

 next to the nucleus. This may be a primiti\e or embryonic condition. Magni- 

 fication 11,000. 



Fig. 3. Electron micrograph showing the fine structure of a Golgi filament 

 in a neurone. Magnification 45,000. 



10-568204 Electron Microscop'j 



