386 GARRISON. 



Llamas, of the Philippine Medical School, who found 21 small trematode 

 worms. 



Superficial examination of the parasites showed that they were Fas- 

 ciolidw, but did not belong to any species reported for man, and after 

 study of stained specimens I was unable to ascribe them to any recognized 

 genus of this family. On May 4, 1908, a preliminary report of the 

 parasite was made before the regular monthly meeting of the Manila 

 Medical Society, giving a brief description, but without definitely deter- 

 mining the systematic position of the worms. 3 



The further study of stained and sectioned specimens has furnished 

 the data for the following more complete description. 



DESCRIPTION OF TYPE SPECIMENS. 



In addition to the diminutive size of the parasites, they are remark- 

 able for the size and prominence of the ventral acetabulum and for the 

 general contour of the body, which is broadest in the region of the aceta- 

 bulum and tapers posteriorly throughout fully two-thirds its length. In 

 its anterior third, the body appears almost round, but becomes increas- 

 ingly flattened dorso-ventrally toward the caudal end. A cephalic cone is 

 absent, but the extreme anterior portion of the body (about one-eighth) is 

 more or less distinctly marked off from the remainder by the prominence 

 of the acetabulum itself and the rapid lessening of the transverse and 



3 The following extract is taken from the proceedings of the monthly meeting 

 of the Manila Medical Society of May 4, 1908: 



"Doctor P. E. Garrison. — A new trematode parasite of man. 



"Author's abstract. — Ova found five times in native prisoners at Bilibid during 

 the past year; 21 worms obtained from last case after dose of male-fern. Patient 

 complained of no symptoms; phj-sical examination negative, except a slight 

 anaemia. Hookworms and whipworms also present. Morphology of parasites: 

 Small Trematoda, of the family Fasciolida; ; 4, 5 to 6 millimeters long by about 

 1 millimeter broad; broadest at junction of anterior and median thirds; skin 

 without spines ; acetabulum near and much larger than oral sucker ; pharynx 

 globular; oesophagus very short; intestinal caeca unbranched and extend to 

 posterior extremity ; male and female genital pores open separately between 

 acetabulum and oral sucker, slightly to left of median line; testicles posterior, 

 median, one directly behind the other, each divided into anterior and posterior 

 lobe by median transverse constriction ; ovary anterior to testicles ; shell gland 

 between testicles and ovary ; uterus moderately developed ; vitellogene glands 

 highly developed, extending from plane midway between acetabulum and ovary 

 to posterior extremity, meeting in median line ventrally and encroaching upon 

 median field dorsally after they pass caudad of the testicles; posterior excretory 

 tract divides just behind testicles into two lateral excretory canals. Ova average 

 107 n long by 63 /* broad, with prominent operculum at one end, unsegmented 

 at oviposition, develop ciliated embryo, which hatches in about one week. 

 Specific and generic position of parasite not yet difinitely determined, the 

 indications being that it may be necessary to create a new species and perhaps 

 a new genus also. (Specimens and photographs demonstrated.)" 



