AVIAN GESTODES. 861 
rather wider, ‘The end of the body, often more than one half of 
the entire worm, is made up of very long proglottids which I 
found to measure as much as five and six millimetres in length. 
They are thus quite as much as or even more than six times as 
long as they are broad. There is no one of the known species 
of Rhabdometra in which the ripe proglottids are so long as in 
the species described in the present communication. It may be, 
Text-figure 2. 
Anterior end of two specimens of Rhabdometra cylindrica. 
The vight-hand figure shows the existence of an unsegmented neck rare 
in the species. 
however, that the individuals of the various species examined by 
my predecessors were not so fully mature as those which I have 
myself been able to study. The greatest length of the hinder 
proglottids is to be found, as it would appear, in Lhabdometra 
nigropunctata, where, according to Crety*, they are three times 
the length of their diameter. That is considerably less than I have 
* Boll. Mus. Torino, v. 1890, No. 88. It should also be noted that this species, 
which measures 140 mm., is nearest in length to mine. 
58* 
