811 STUDIES ON GREGARINES—KAMU 81 



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

 parasites themselves. The Tunicates 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 ^T^. Ellis 1913:271,290 



40yLi 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 annectens. 



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 

 1899 Gregarina salpae 

 1903 ^^ Gregarina'" salpae 



Intestine of Salpa maxima. 



1886 Gregarina flava 

 1899 Gregarina flava 

 1 903 * ^Gregarina" flava 



1894 Gregarina ensiformis 

 1899 Gregarina ensiformis 

 1903 "Gregarina" ensiformis 



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 coUa 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. 



