TYNDARIDEA. 161 



dochrome, which near the period of conjugation exhibits a 

 somewhat stellate arrangement. Sporangia circular, not 

 producing any material change in the primary form of 

 the cell. 



Conjugata cruciata Vaucher, Hist, des Conf. pi. vi. fig. 4. ; 

 pi. vii. fig. 2. p. 77. 



Nab. Cheshunt: A.H.H. 



I have but little doubt that this is the Conjugata cruciata of 

 Yaucher. It is the finest of all the Tyndaridea I have met 

 with. It is not common : and I have only once obtained it 

 with the sporangia formed. 



2. TYNDARIDEA ANOMALA Ralfs. 

 Plate XXXVIII. Figs. 2/3. 



Char. Filaments smaller than those of T. cruciata. Cells in 

 the young state usually about as long as broad, densely 

 filled with endochrome, and invested with a broad and 

 very apparent mucous sheath; in a more advanced con- 

 dition the threads become narrower, the sheath smaller, 

 and the endochrome more scattered, and sometimes even 

 stellated ; finally, the sporangia are formed, which are 

 circular, and protrude slightly into the tubes of commu- 

 nication of the filaments. 



T. anomala Kalfs, MSS. 



Hob. Penzance and Dolgelly : Mr. Ralfs. High Beech : 

 A. H. H. In a boggy spot near Cross in Hand, oppo- 



tsite to where the road branches to Hailsham ; Barcombe, 

 in Sussex, and Weston Bogs, near Southampton: Mr. 

 Jenner. 



This remarkable and somewhat anomalous species was first 

 discovered by Mr. Kalfs, who submitted it to the examination . 

 of several friends. For a long time, however, doubts were 

 entertained by many as to whether it really was a Tynda- 

 ridea or not ; doubts which I myself, in common with others, 

 for a period entertained, but which I was happily enabled to 



M 



