80 
Tienia diminuta E. n. sp. — Tsenia: Head obconical ; neck Ions, slender; anterior seg- 
ments very short; the rest, suhcuneate, obtuse. 
Habited. — Collected by Olfers in Brazil from the intestines of a gravid rat {Hus 
rattus). Specimens 6 to 9 inches or more in length, and, since the measurements 
were taken from fragments, perhaps longer. Head obconical, with rather large 
suckers situated anteriorly; it is similar to that of T. omphalodes (described, ^Mantissa 
[Eudolphi, 1819], p. 491), but much smaller, for which reason I have chosen the 
specific name Idiminuta']. Xeck long and slendei’. Segments at first resembling cor- 
rugations, gradually becoming larger, with their length always remaining less than 
their width, with obtuse angles; posterior segments more or less variable, but short. 
Eggs subglobose, of medium size. 
XoTE. — I would have said it were omphalodes if the head were not much smaller 
and the eggs larger; the contention might be made that the eggs of omphalodes could 
grow larger; a head, however, will not increase in size. (Translation). 
Some years later Creplin (lS25a, pp. 11-1 '2) described as a new spe- 
cies a tapeworm from the rat which he named Txnia lejytocejyhala. 
The following is translated from his description:" 
Taenia: Head slender; suckers large, globose; rostellum, conical, truncated, 
unarmed; neck, continuous, elongated; segments all short. 
Habitat. — I once collected, April 19, 1822, two specimens of this tapeworm in the 
intestines of a mouse {Hus musculus). Of the;se I took out only one with a head, and 
a fragment of the posterior part of the body. 
I am compelled to give a description from these specimens as already preserved 
for some time in alcohol, since I did not have time to examine them when they 
were fresh. 
The length of the worm with the head equals 10 to 11 inches; of the other without 
a head about 9. The width, decreasing from the tail toward the head, measures a 
little more than a line at its maximum in the posterior part of the body. Color 
white. 
Head small, slender, furnished with large globose suckers, which when projecting 
have orbicular apertures, likewise large, and with a rostellum, conical, truncated, 
and unarmed. AVith the suckers withdrawn the length of the head equals its 
thickne.ss at the base. Xeck rather long, slender, continuous with the head, flat- 
tened. Anterior segments resembling c-orrugations; following segments very short, 
a T. capite tenui, osculis maximis globosis, rostello conico truncato inermi, collo 
continuo elongato, articulis omnibus brevibus. 
Hab. Semel (d. 19. Apr. 1822) in int. Huris muscnli offendi hujus Tienite duo 
specimina, quorum alterum solum cum capite extraxi, et fragmentum corporis 
postici. 
Deseriptionem dare coactus sum de speciminibus illis jam per quoddam tempus in 
spiritu vini servatis, cum recentium examinandorum tempus deficeret. 
Longitudo vermis capite adhuc gaudentis fequat decern ad undecim polhees, alte- 
rius capite privi novem circiter. Latitudo, a cauda ad caput semper decrescens, 
maxima, postica in parte lineam parum excedit. Color albus. 
Caput parvum, tenue, osculis vero magnis, globosis, apertura orbiculari pariter 
magna, exstantibus, et rostello caput ipsum longitudine et basi sua etiam crassitie 
(osculis deductis) aequante, conico, truncato, inermi instructum. Collum satis 
longmn, subtile, cum capite continuum, planum. .Irticuli antici rugaeformes, 
sequentes brevissimi, marginibus lateralibus obtusis, reliqui omnes, semper breves, 
anticam partem paululum contractam, margines laterales interdum convexiusculos, 
interdum fere rectos, marginem posteriorem vero tumidulum exhibent. Eltimi 
articuli non adsunt. Foramina articulorum non vidi. 
