NO. 5 INTERMEDIATE HOSTS OF ASIATIC BLOOD FLUKE BARTSCH IQ 



magnification minutely granulose. Postnuclear whorls moderately to 

 well rounded, marked with incremental lines that vary in strength 

 and spacing. Suture varying from moderately to strongly constricted. 

 Periphery and base well rounded, base narrowly umbilicated. Outer 

 lip provided with a callus behind the aperture. Aperture broadly 

 ovate. 



Operculum. — The operculum is thin, horny, paucispiral, consisting 

 of 3.2 whorls, with the nucleus somewhat excentric. 



Radula. — The radula is moderately large. The rachidian tooth has 

 3 denticles, i. e., a large median and a lesser one flanking this on each 

 side. The basal denticles in the rachidian tooth are 3 on each side ; 



the formula therefore is . The lateral tooth is very oblique, 



bearing 6 denticles, of which the third from the inner edge is a giant 

 compared to the rest. The inner marginal tooth varies in the number 

 of denticles in the different species, from 7 to 9. The number of 

 denticles in the outer marginal tooth range from 5 to^ 7, the innermost 

 being much larger than the rest. In this character the Katayamas 

 are also distinguished from the Blanfordias. 



Animal. — I have not studied these animals alive ; all the informa- 

 tion here cited is therefore second-hand. 



The anatomy of the alimentary, respiratory, renal, circulatory, ner- 

 vous and reproductive systems is beautifully described and figured 

 by Robson (27). The affinities of the animal are also worked out 

 by him. To this masterly paper we refer any one interested in these 

 subjects. 



The egg. — The eggs, Dr. Li writes me, " are attached as individual 

 specimens to rocks and are covered with sand." His figure here 

 published (pi. 6, fig. 4) also shows five side by side in chain forma- 

 tion. In Oncornelania they form clumps enclosed in a common jelly 

 mass. 



Ecology. — Robson, quoting Leiper, says that they (Kafayama noso- 

 phora) " occur in damp moss and grass on the sides of plants in the 

 rice fields in very great quantities." 



Li, as well as Faust and Meleney, found the Chinese species to be 

 mountain dwellers. A glimpse at an Eastern Chinese topographic 

 map shows that the mountain range attains a height of 4,000 feet at 

 a moderate distance from shore along the coast, and it is in the streams 

 of this that Katayama finds a suitable habitat. Of the habits of 

 Katayama fausti Faust (32) states: 



[At] the village of Ch'en Chia Chiao, about three and a half miles from the 

 southwest corner of Shaohsing City, * * on the intermediate ground of moist 



