The family Koellikeriadae. 153 



in muscles of Xiphias gladius. Neck short, suckers, pharynx and 

 digestive tract practically absent. Uterus and vas deferens open 

 together at cephalic extremity. Body forms a lobulated mass with 

 extensive fusion of lobules. Nutritive vascular film from host 

 extending everywliere among tliese lobules. Eggs innumerable round 

 and yellow. Shell gland bulky. No receptaculum seminis. Dimen- 

 sions 40 X 28 X 24 mm. 



Koellikeria sconnhevomori n, sp, 



On October 1, 1911 there were found in the stomach of tlie 

 Spanish Mackerei {Scomheromorus maculatus) 5 worms 4 of which 

 were loose while 1 lay in a cavity or cyst in the wall of the 

 stomach from which it could be puUed out. These were kidney 

 shaped and measured 1,75X1,08 mm with a slender neck which 

 protruded 0,12 mm. No exact study could be made since none of 

 the Worms were cut into sections, but coils of the uterus füll of eggs, 

 the tubulär ovary and vas deferens could be seen shining through 

 the body wall. The ova measure 0,014 X 0,01 mm. 



In the very delicate neck the uterus and the vas deferens can 

 be seen extending quite to the tip of the cephalic extremity. There 

 is a small muscular mouth sucker and a very definite muscular 

 Pharynx there but no alimentary tract could be definitely made out. 



Further study of this parasite will be necessary when better 

 material is obtained before its systematic position can be more defini- 

 tely established but there seems no question of its belonging to 

 this genus and its size and shape and the form of the neck, which 

 shows no cephalic enlargement, seem sufficient to distinguish it from 

 any of the described forms. 



In the same fish there were found on another occasion, August 15, 

 1912, four small pear shaped cysts of a bluish or lead color firmly 

 attached to the gill filaments. They measured 5X3 mm and at 

 the Center of the larger end there could be seen a small dark spot 

 which seemed to be an opening. On teasing out the contents of 

 one cyst it was found to contain two worms of an orange color with 

 much black material in several parts of the body. Serial sections 

 showed the cysts to be very thick walled and the contents to be 

 almost entirely necrotic and loaded with black pigment. Many eggs 

 of oval form raeasuring 0,01 mm could be seen but no outlines of 

 the Organs remained visible. In this case we venture nothing fur- 

 ther but await more material for a more satisfactory study. The 



