CHIRONOMUS PRASINUS. 165 



reward the carbonic acid and nitrogenous waste of the Radiola- 

 rian, which is its own needed support, and by using which it is 

 enabled to multiply itself."^ 



2. — Presence of C/iIorop/iyll {\). 78). 



It is now ascertained that the supposed Chlorophyll in Idotea 

 and Bonellia is not that body at all, but a green pigment, for which 

 the term " bonellein " is proposed. In Anthea ceretis, var. S7)ia- 

 ragdijia, the substance is termed " Anthea green," differing from 

 chlorophyll in some ways, but apparently capable of causing 

 evolution of oxygen ; in the variety plu/nosa, which also evolves 

 oxygen, there is no chlorophyll, but a great number of parasitic 

 algae are seen in the endodermal cells. The variety smai^agdina 

 also contains a few parasitic algse.f 



[Erratum. — Part First, Section I., p. *]"] , for " Chalmydamonas,," read 

 ' ' Chalmydomonas. "] 



Cbironomu6 prasinue* 



By a. Hammond, F.L.S. 

 Plates 9 and 10. 



Part II. 



'"T^HE Malphigian tubes are four in number ; they open into 

 X a slightly dilated chamber at the beginning of the small 

 intestine. The term " bile tubes," which I have employed 

 for these organs on former occasions, must, I think, be discarded, 

 the balance of opinion being against it. It is generally stated 

 that the Malphigian tubes belong to the proctodeum, and are 

 consequently of epiblastic origin, and there is no difficulty in 

 accepting this theory in the present case, so far as the structures 

 of the larva may be allowed to bear upon the point, but in an 

 allied genus t which I have investigated, the separation between 



* P. Geddes, " Nature," Vol. XXV., p. 303. 



+ Ibid. 

 X Simuliinn, species not determined. 



