286 DISCOVERY REPORTS 



one to five globular gonomeres. In the figured specimen spores are emerging from the top of the distal 



gonomere. The parasite penetrates into the host by means of a more or less dichotomously divided root 



system. 



Hovasse (i925«). The spores of ParoIIobiopsis coutieri Collin are flagellispores, not dinospores as 

 might have been expected on the presumption that the EUobiopsidae are allied to the Peridinea. 



Hovasse (1925Z)). Cytological studies of the cycle of evolution of P. coutieri. 



Hovasse (1926). Extensive studies of living and preserved material of P. coutieri. The author shows 

 that this organism is a real parasite, as in the centre of the sucker with which it is attached to the 

 host the cuticle of the latter shows an opening through which a protoplasmatic mass of the parasite 

 penetrates into the tissues underlying the cuticle, thereby forming an organ for the absorption of food. 

 As far as concerns the systematic position of the EUobiopsidae, Hovasse remarks that they form 

 a special group in the class Flagellata. The form described by Zachs as Ellobiopsis eupraxiae, according 

 to Hovasse must be the type of a separate genus, on account of its divided root system. Hovasse 

 proposes for this genus the name Rhizellobiopsis ; he remarks that the shape of this parasite corresponds 

 with Staphylocystis in so far as it bears more than one gonomere on the top of its trophomeres. 



Macdonald (1927). Among the parasites of Meganyctiphanes fiorvegica (M. Sars) this author notes: 

 ' Staphylocystis racemosus (Coutiere), a dinoflagellate found on the carapace of a specimen caught at 

 " Cumbrae Deep " in March 1925. The only record of this parasite is that of Kroyer on Pasiphaea tarda 

 in N.E. Iceland' (loc. cit., p. 780). Instead of 'Kroyer', read 'Coutiere'; the type specimen of 

 Coutiere's Staphylocystis racemosus is from north-east Iceland. In all probability, however, the 

 identification of the parasite is incorrect. It is stated to occur 'on the carapace', and, therefore, 

 almost certainly belongs to Amallocystis fagei dealt with in the present paper. Support to this opinion 

 is, moreover, given by the fact that the host is a Euphausiid. The hitherto known EUobiopsidae of this 

 group of Crustacea belong to the species A. fagei. 



Steuer (1928). Notes on Ellobiopsis chattoni as a parasite of the copepods Pleuromamma gracilis 

 (Claus) from one station in the Indian Ocean, about half-way between south India and Madagascar, 

 and of P. borealis (F. Dahl) from two stations in the South Atlantic, off South Africa. The material 

 was obtained by the Valdivia Expedition, from depths of 2000-2500 m. Young and older stages of the 

 parasite are described and figured. The adult stage differs from the specimens of Ellobiopsis chattoni 

 described by Caullery (1910) in being smaller (422// against 700/<), and in having a different shape. In 

 CauUery's specimens the gonomere is much larger than the trophomere, in Steuer's figure the globular 

 gonomere is much smaller than the pear-shaped trophomere. Moreover, the groove between the two 

 parts of the parasite in Steuer's specimen is much more pronounced than in those of Caullery. Steuer 

 classifies the EUobiopsidae among the Flagellata. 



Reichenow (1930). Ellobiopsis chattojii recorded as occurring in the North Sea and in the Baltic. 

 Notes on the distribution of the other EUobiopsidae. 



Steuer (i932fl). Description oiE. elongata, a parasite of Ctenocalanus vanus Giesbr. from the Meteor 

 Expedition (St. 57, about 50° S, 35° W, near South Georgia, from a depth of 50-100 m.). Differs from 

 Ellobiopsis chattoni by its more slender, cylindrical trophomeres, which in full-grown specimens bear 

 two globular gonomeres. The stalk penetrates into the appendage of the host. 



Steuer (19326). More elaborate notes on the specimens of E. chattoni dealt with in a previous paper 

 (Steuer, 1928), with three more records of the parasite in the Indian Ocean (stations of the Valdivia 

 Expedition) and one more record in the Atlantic, off South Africa (station of the Meteor Expedition). 

 A map shows the distribution of E. chattoni, based on the data in Steuer's paper and in those from the 

 previous literature. 



Steuer (1933). A summary of the i932Z> paper by the same author. 



