486 G. II. MAIiTIN. 



that frequently two dividing forms have been found in the 

 same field. As such infections, liowever, seem extremely 

 rare, 1 have decided to publish my observations on the 

 division of the active form of Try panoplasm a congeri 

 at once, reserving the notes we liave at present made on the 

 changes into the resting form for a later paper, in the later 

 paper we ho]ie also to deal more fully with the genei-al litera- 

 ture of the group. I shall only mention in this ))aper the 

 provions iiccounts of iiit('stin;d trypanoplasmn, and, in :i later 

 section of the ]i;i])er, I shall ix-fer to the descriptions of 

 division given U>\- this genus by Keysselirz and Friedrich. 

 Tho liist desci-i})t ion of an intestinal trypanoplasnia was 

 given by Leger in 1005 for a form, Trypanoplasnia 

 intestinalis, which he found in the stomach of Box boops. 



The second intestimil trypanoplasma, hitherto described 

 Trypanoplasnia ventricnli, was found by Keysselitz 

 in the stomach of Cyclop terns lumpus, and is figured 

 on }i. 37 of his paper on Generations- und Wirtswechsel von 

 Trypanoplasma borrel i . 



I do not ])ropose to enter into any details as to the con- 

 ditions under which Ti-y pan op la sm a congeri occuis in 

 this pajier, as these notes will be reserved for our later 

 paper. The active form of the parasite is, however, always 

 found in sections of tiie conger's stomach in the mucus 

 lining the surface of the wall, and it never seems to spread 

 into the deep glandular pits. LTp to the present no sign of 

 the active try pano})lasma has been found in any part of tlie 

 intestine or rectum, and, in fact, if active trypanoplasma are 

 mounted in the intestinal juice they almost immediately 

 become a^ulomerated bv their posterior extremities, and 

 have disa])peared entirely at the end of a couple of hours. 

 Up to the pi-esent forty-seven congers have been examined, 

 and of these only ten have been found to be infected. The 

 pai-asite has been found in small numbers in some cong-ers 

 in Avhich the stomach and intestine were full of food, but the 

 only leally heavy infections have been obtained from fasting 

 congers. 



