the Memoirs on Loxosoma. 
397 
pedal gland. JSalensky says tliat his Loxosoma crassicauda 
belongs to the species in which the pedal gland, present in the 
buds, subsequently undergoes complete suppression. During 
my investigation of the first examples of the animal living on 
the tubes of PhyllocJuetopterus I was of the same opinion. The 
end of the peduncle of the adult form looks like the foot of 
of an elephant (fig. 1, B), whereas the buds of the same animal 
possess the well-marked human foot, carefully described by me 
in L. pes (fig. 1, A). The gland in the latter is exceedingly 
Fig. 1. 
distinct; but in the mature peduncle it becomes indistinct 
only in consequence of the thickening of the integument and 
the usual adhesion of particles of dirt. It is present and of 
the same nature and extent as in the bud, but stands in a 
somewhat altered position relatively to the wall of the pe¬ 
duncle, as the figure shows : d is the gland, e the efferent 
duct. I am therefore convinced that Salensky has remained 
in the error into which I at first fell, and that Loxosoma 
crassicauda does not belong to the species with an aborted 
pedal gland. Judging from this instance, I think we are 
even justified in doubting whether this reduction of the pedal 
gland takes place in any of the described species. 
L. Kefersteinii .—The doubt just expressed applies especi¬ 
ally to this form. Of it Claparhde has given only outline 
drawings from living objects without any details; whilst 
Nitsche’s investigations were made only on material hardened 
in alcohol, and in part treated with osmic acid. As regards 
Claparbde, who evidently occupied himself only en passant 
with Loxosoma , the overlooking of the pedal gland on his 
part would be very easily explained. As 1 have, moreover, 
