12 Records of the Indian Museum. [Vor coh, 
the latter always small, with prong directed posteriorly when the 
rostellum contracts. 
Type-species:—Drepanidotaenia lanceolata (Bloch, 1782) 
Railliet, 1892. 
Larval stages have been found in small crustaceans. 
This genus does not appear to differ from Hymenolepis, 
Weinland, 1858. 
Drepanidotaenia gracilis (? Zeder, 1803) Krabbe, 1860, 
Railliet, 1892. 
ZEV £948 Phenicopterus Zoological Gardens, T. Southwell. About two 
voseus. (Flamingo). Calcutta. hundred 
specimens. 
Synonyms :—Taenzia collo-longtssimo, Bloch, 1782 ? 
Taenia gracilis (Zeder) Rudolphi, 1810 ? 
Halysis gracilis, Zeder, 1803 ? 
Literature:—Stiles and Hassall, 1896 ; Fihrmann, 1908. 
Stiles gives the following description of this worm :— 
‘‘About 270 mm. long, by 1°5 to 2 mm. broad. Head sub-glob- 
ular. Rostelium cylindrical, obtuse, armed with a simple crown 
of 8 hooks, 77-80» long. Neck very short,...... genital pores 
unilateral. Receptaculum pyriform ; penis unarmed. Genital sinus 
provided with large spines.” Our specimens, although extremely 
small, undoubtedly are of the same species. They measured only 
3mm. long and ‘*5 mm. broad. The posterior segments measured 
"15 mm. long and*6 mm. broad, and were not fully mature. They 
showed a tendency to become square. ‘The genital pores are uni- 
lateral. The rostellum is cylindrical and measures *3 mm. long. 
It is marked by transverse wrinkles. The hooks are eight in 
number and they measure ‘o8 mm. long. These hooks are attached 
to the extreme end of the rostellum. There is no neck. The 
testes are three in number, and are situated posteriorly, two being 
lateral and one median. ‘The vas deferens runs nearly straight to 
the anterior aporose corner of the segments and swells into a very 
large vesicula seminalis. The cirrusis long. The penis was not 
observed. Unfortunately the female reproductive organs did not 
appear to be sufficiently developed to admit of description. 
For notes on the systematic position of this genus see 
Fuhrmann, 1908. 
Genus Diorchis, Clerc, 1903. 
Generic diagnosis:—Hymenolepidinae. Rostellum with a 
single crown of ten hooks with long dorsal and short ventral roots, 
or exceptionally, with very short dorsal root and with ventral root 
nearly as long as the blade. Surface of the suckers may be armed 
with minute spines. Inner longitudinal muscular layer consisting 
of 8 bundles, 4 dorsal and 4 ventral. Two testicles in each seg- 
ment. Adult in birds. 
Type-species :—Diorchis acuminata (Clere 1902) Clerc, 1903. 
