6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 9I 



The first of the species of ProJieinistouium, P. fajardensis, de- 

 scribed here may be distinguished from all other species of the genus 

 by the size of the eggs, which are only about half as large as those 

 of the other species. The second species, P. appendiculatoidcs , ap- 

 pears to be closely related to P. appcnd'icidata, which was described 

 by Ciurea (1916) from dogs and cats in Rumania ; it differs, however, 

 from that species in having a distinct esophagus { almost absent in 

 P. appeiidiculafa) and in having an acetabulum cjiily about one half 

 the size of the oral sucker (suckers about equal in size in P. appen- 

 diculafn). P. fajardensis also resembles in some respects a species. 

 P. serpcntwn, described from a snake, Natrix piscator, by Gogate 

 (1932) at Rangoon, India. Aside from the difference in host relation- 

 ship, the two species may be distinguished by the fact that P. fajarden- 

 sis is much smaller than P. serpentum, and that in the former the 

 adhesive organ does not cover the vitellaria as it does in the latter 

 species. 



REFER KNXES CITED 



Ciurea, Joan 



1916. Prohoitisfonimn appiCiidiculatHiii. eine neue Holostomiden-Art aus 



Hunde-und Katzendarni. desseii Infektioiisquelle in der Siisswas- 



serfischen zu suchen ist, etc. Zeitschr. Tnfektionskrankh. parasit. 



Krankh. u. Hyg. Haustiere, Berlin, vol. 17. pp. 309-328, pis. 15-16. 



Go(;ate, B. S. 



193-'. On a new species of trematode {Prohemistomiim scypciitmn. n. sp. ) 

 frfiin a snake with a note on an immature species of Hetcrechino- 

 stomnni Odliner from the cat. Parasitology, vol. 24, pp. 318-320, 

 figs. I, 2. 

 Looss, Arthur 



1899. Weitere Beitrage zur Kenntniss der Trematoden-Fauna Aegyptens, 

 zugleich Versuch einer natiirlichen Gliederung des Genus Distomuni 

 Retzius. Zool. Jahrb., Jena, Abt. Syst., vol. 12, pp. 521-784, pis. 24- 

 32, figs, a, b. 

 Ntcoll. William 



1909. Studies on the structure and classification of the digenetic trematodcs. 

 Quart. Journ. Micr. Soc, n. s., vol. ^t,, im>- 301-487, pis. 9. 10. 

 WtTi:NKERt;, G., 



1929. Studies on the treniatodc-family Hcterophyidae. Ann. Trop. Aled. and 

 Parasit., vol. 23, pp. 131-239, fig^- i-33- 



