284 DISCOVERY REPORTS 



Scott (1897). Drawing of a specimen of C alarms finmarchiciis (Gunn.) found in the Clyde, up as far 

 as the head of Loch Fyne, with an ' Infusorian-like ' parasite. The author adds: 'the parasites are 

 found adhering to the body of the copepods, to the antennules, to the antennae, and to other appen- 

 dages, but usually about the head; sometimes large numbers of Calanus will be found infested by 

 these parasites.' The figure shows a parasite with a comparatively long stalk. The body is divided 

 into a smaller proximal part and a larger distal part, just as in Ellobiopsis chatto?u described by Caullery 

 (1910). 



Mrazek (1902). Numerous specimens of Calanus fmmarchiais from the Spitzbergen region of the 

 Arctic Sea showed large short-stalked ' cysts of some Ciliate ' on the antennulae or on the maxillipedes 

 or on the thorax. Mrazek was convinced that these cysts were the same as the parasites mentioned and 

 figured by Scott (1897). 



Caullery (1910). Description of Ellobiopsis chatto?ii, a parasite of Calanus helgolandicus Claus from 

 Banyuls-sur-mer. The parasites are attached by means of a stalk to the mouthparts, maxillipedes, and 

 antennae of the copepod. Young stages are oval or globular; older stages show a division of the body 

 in two parts, a smaller trophomere and a larger gonomere. The stalk penetrates into the appendage of 

 the host. Caullery is convinced that this stalk is not only an organ of fixation, but also an organ for the 

 absorption of food from the host. The systematic position of the parasite is discussed, and there are 

 indications which point to its being allied to the Peridinians, which are known to contain a number of 

 parasitic forms. In a postscript Caullery adds that Mrazek drew his attention to the similarity of 

 Ellobiopsis to the parasites mentioned by Scott (1897). Material afterwards received from Scott proved 

 the identity of the two forms. 



Apstein (191 1). Notes on 'Parasit 19' occurring on Pseudocalanns, Calanus and Acartia; as a rule 

 on the antennae. The figures represent one undivided specimen and one with distinct trophomere 

 and gonomere. The more or less globular gonomere is about half as large as the slightly elongate 

 trophomere. 



Coutiere (191 1«). Short description of parasites occurring on Parapasiphae grimaldii Coutiere (not 

 mentioned in later papers by the same author as a host of EUobiopsidae), Acanthephyra purpurea A.M.E. 

 and A. pulchra A.M.E., similar to Ellobiopsis chattoni Caullery. These parasites do not show a trans- 

 verse septum (no division in trophomere and gonomere) ; they are attached to their hosts by simple 

 broadening of their proximal extremity, without penetrating the appendage of the host. 



Coutiere (191 16). Remarks that specimens of Ellobiopsis were found by him on Systellaspis debilis 

 (A.M.E.), Acanthephyra pulchra A.M.E. and A. purpurea A.M.E. To these parasites the common 

 name Ellobiopsis caridarum is given, though there are five forms of probably specific distinction. The 

 most common form, indicated as a, is ovoid or elongate, without stalk ; y? is a swollen form with a long 

 stalk originating from a broad circular base ; 7 is a slightly conical form with broad base of attachment, 

 and its cuticle is covered with soft hairs ; e is a form consisting of two successive cylindrical elements ; 

 7 is a form with short spherical elements. Consequently in e and ?/ the body is divided into trophomere 

 and gonomere, whereas in the other forms no such division was observed. 



In the same paper an EUobiopsid is described consisting of about fifty cylindrical bodies, united on 

 a common stalk, the cylindrical bodies up to 4 mm. long, each divided into two to eight elements. The 

 stalk penetrates the abdominal wall of the host, Pasiphaea tarda Kroyer, and ends with a blunt point 

 in the connective tissue under the ventral nerve cord. Coutiere names this organism, which he regards 

 as a real parasite, Ellobiopsis racemosus. 



Chatton (191 1). Points to the similarity of Apstein's parasite 19 with E. chattoni Caullery and the 

 parasite found by Scott on Calanus finmarchiciis (Gunn.). 



Coutiere (1911c). More elaborate data on the EUobiopsidae dealt with in previous papers (Coutiere, 



