Pancreatic Glands ? of the Infusoria. 61 



beings possess a generating apparatus, which is developed to 

 a great extent. Hence he concludes, that the organs in ques- 

 tion are concerned in the act of reproduction. The existence 

 of ovaries admitting of no dispute, and the rotatory animals of 

 a certain size being unquestionably hermaphrodites, be contends 

 that the organs of the Polygastrica now under consideration re- 

 present the male genital organ in these animals^ as, in the Rota- 

 toria, the contractile vesicles undoubtedly accomplish analogous 

 functions, for they closely adhere to organs which have precisely 

 the form and situation of male seminal organs in the Daphnia 

 and Cyclops. Hence he considers that he has demonstrated 

 the high probability, at all events, of the existence of two sexual 

 organs (male and female), in the polygastric Infusores. 



ni. Concerning a violet or very deep blue coloured liquid, which is 

 found in the Intestines of the Polygastrica, and concerning the 

 particular organs which secrete it. 



As mentioned in former memoirs, Professor Ehrenberg had 

 regarded as analogous to the pancreas two glands, consider- 

 able in size, which, in the Rotatoria, are found placed at the 

 commencement of the intestinal canal, immediately under the 

 oesophagus. He at that time pointed out their relations, and 

 stated that they existed probably in the whole of these animals. 

 If all this be true, as their situation and their connection with 

 the intestine, as well as their glandular structure, would lead to 

 infer, then the pancreatic fluid in all the Rotatoria hitherto as- 

 certained, judging from the colour of the organs themselves, is 

 either clear and colourless, or whitish, milky, and mixed-like. 

 For a time in the Polygastrica, he was not able to discover any 

 traces of these organs, though so distinct in the Rotatores ; but 

 more lately, he has discovered many species of Infusores, which 

 exhibit in the interior of their bodies a liquid of an exceedingly 

 beautiful violet colour. This liquid flows into the intestinal canal, 

 colours its contents, and with them is expelled from the body. 

 Professor Ehrenberg discovered this liquid especially distinct 

 in two species. In a third, belonging to a neighbouring genus, 

 he very distinctly observed the traces of the secretion of a li- 

 quid which was more red than that just alluded to. He de- 

 signated these three species by the names of Nassula elegans, 



d8 



