TEXAS NATURE OBSERVATIONS AND REMINISCENCES. 47 



The most accepted theory re- 

 garding the migration of the echi- 

 nocoecus into the substance of the 

 liver in man is this one : that after 

 the echinococcus embryo is set 

 free in the intestines from the food 

 or drink containing the ova, it 

 starts on its migration into the 

 portal vein, and through that 

 source into the liver. Besides the 

 portal vein and its hepatic branch- 

 es, some authors claim the gall 



tered, and in Pepper's system of 

 medicine on echinococcus of the 

 liver, mention is made of an oc- 

 casional anomalous development 

 of the multilocular parasite, which 

 from its resemblance to colloid 

 cancer, was supposed to have this 

 character. Peper states: "'Its re- 

 semblance to colloid cancer is the 

 more striking because of the tend- 

 ency of the interior of the mass to 

 undergo degeneration, to disinte- 



Headpahts with Hocklets in the Center and Suction Cups of the 

 EccHiNococcus Parasite in Rabbit (Highly Magnified.) 



ducts and the lymphatic sinuses 

 as the main source of migration 

 into the liver substance, remnants 

 of the r>arasite having been found 

 within the lumen of these vessels. 

 The medium of transmission of the 

 so-called echinococcus multiloeu- 

 laris or conglomerated cyst sacs 

 has a somewhat different patho- 

 geny than the other typical form, 

 because well-defined scolices or 

 parts of same are seldom encoun- 



grate, and to break up into pus 

 sacs. An echinococcus multilo- 

 cularis tumor is of almost stony 

 hardness; it has a very dense fi- 

 brous structure, intersected by ca- 

 vities with thick gelatinous cavi- 

 ties," etc. I have myself not en- 

 countered just such conditions as 

 the above mentioned in examin- 

 ing echinococcus conglomerations 

 in the rabbit, but J do recollect 

 many years ago. having removed 



