81] STUDIES ON GREGARINES—KAMM 81 



field from a phylogenetic point of view — both as regards the hosts and the 

 parasites themselves. The Tiinicates represent the highest type of hosts 

 recorded for gregarines. Whether or not the gregarines are also the most 

 complex is a problem of the future. 



[? Ritter] 

 [Figure 98] 



1893 Gregarina sp. Ritter 1893: 69 

 1899 Gregarina sp. Labbe 1899: 37 

 1903 Gregarina sp. Minchin 1903: 339 

 1913 Gregarina sp. Ellis 1913: 271, 290 



40/x in diameter. The parasites were found in the digestive tract, 

 boring through the walls, and in the coelom. Three bands characterize 

 all but the smallest, made up of "many elongated granules possibly 

 cuticular in structure though they seem to take the stain." 



Host: Perophora annedens. 



The specimens described have little the character of polycystid gre- 

 garines (Fig. 98). There is a superficial resemblance to the genus Taenio- 

 cystis, but they possess no protomerite, and in one instance two nuclei are 

 present, which leads to the hypothesis that they may belong to the genus 

 Haplozoon. 



[? Frenzel] 

 [Figures 39 and 117] 



1885 Gregarina Salpae Frenzel 1885: 565 

 1899 Gregarina salpae Labbe 1899: 37 

 1903 "Gregarina" salpae Minchin 1903:339 



Intestine of Salpa maxima. 



[? Roboz] 



1886 Gregarina flava Roboz 1886: 1, 46 

 1899 Gregarina flava Labbe 1899: 37 

 1903 "Gregarina'' flava Minchin 1903: 339 



Intestine of Salpa confoederata, S. vagina. 



[? Bargoni] 



1894 Gregarina ensij or mis Bargoni 1894: 44 

 1899 Gregarina ensiformis Labbe 1899: 37 

 1903 "Gregarina" ensiformis Minchin 1903: 339 



Intestine of Salpa aeruginosa. 



The following data is given, by Bargoni, concerning this species: 



Sospettai tratarsi di qualche parassita e particolarmente di una Gregarina avendone gii altra, 

 di forma per6 semilunare, ma molto simile pel contenuto giallognolo, avuta in esame dal Prof. 

 Kleinenberg, che la trov6 frequentemente parassita nella Cydippe e nella Alciopa. Di questa 

 nuova forma, che non va confusa colla Gregarina flava del Roboz da me potuta osservare una 

 volta sola in Salpa aeruginosa, mi occuper6 altra volta, accontentandomi pel momento di 

 distingueria col nome di Gregarina ensiformis n. sp. 



