The family Koellikeriadae. 



167 



MONTICELLI, Saggio di una morfologia dei Trematodi, 1888. 



— , in: Proc. zool, Soc. London, 1889, June 4, p. 321. 



— , in: Zool. Jahrb., Suppl. 2, 1893, p. 137 — 150. 



— , in: Mem. Accad. Sc. Torino, (2) Vol. 42, 1892, p. 688. 



Paeoxa e Perugia, in: Boll. Mus. Zool. Genova, 1893. 



KiCHiARDi, in: Atti Soc. Tose. Sc. nat., 1902—1903, Vol. 13. 



RUDOLPHI, Entozoorum Synopsis, 1819, 346, tab. 2. 



Stossich, Studio degli elminti, Trieste 1900, p. 8. 



Taschenbeeg, in: Ztschr. ges. Naturw., Vol. 4, 1879, p. 605 — 617. 



Wagener, in: Arch. Naturg. 1858, Jg. 24, p. 250. 



Wei)L, in: SB. Akad. Wiss. Wien, math. naturw. Kl., Vol. 16, 1855, 

 p. 371. 



We wish to express our gratitude to Dr. B. H. RansOM of the 

 IT. S. Dept. of Agriculture who kindly sent us Photographie copies of 

 sorae of the less accessible literature. 



Explauation of plates. 



m. s Mouth sucker 



j)Ji Pharynx 



ü' Intestine 



f.g.p Female genital pore 



m. g. p Male genital pore 



V. d Vas deferens 



g Supraoesophageal ganglien 



V. s Ventral sucker 



i(t Uterus 



Plate 1. 



Koellikeria xiphiados. 



Fig. 1. Portions of cyst in the muscle of the sword fish from 

 which Worms have been removed. 



Fig. 2. Whole worm. Lobules spread apart to show projecting head. 



Fig. 3. Section of portion of one lobe showing coils of uterus, 

 testis and vitellarium. The cuticular covering extends over all lobules 

 and between them is the vascular film from the host. 



Fig. 4. Longitudinal section of the head showing muscular pharynx, 

 Uterus and vas deferens. 



Fig. 5. Transverse section of vascular cord running through muscles 

 of the host to the cyst. 



