474 
cannot regard the objections of Lühe (1899) as adequate for its re- 
jection. | 
Taenia filicolhs Rudolphi is not a synonym of Taenia ocellata Rud. 
as Kraemer (1892) has stated. Kraemer’s form was a new species 
which I have named Proteocephalus fallax nov. spec. (vide infra). 
An examination of Monticelli’s type slides of Tetracotylus cory- 
phicephala, the type of Tetracotylus by Braun’s designation, shows that 
species to be generically different from Proteocephalus filicollis Rud. 
Hence Tetracotylus and Proteocephalus are not synonyms. But since 
Braun (1900) has objected to the name Tetracotylus on the ground 
that it has been used for Tetracotyle, a name proposed by Filippi (1894) 
to designate a group of immature trematodes, I propose for this genus 
of cestodes the name Monticellia in honor of Prof. Fr. Sav. Mon- 
ticelli who has done much to advance our knowledge of the group. 
The genus is characterized thus: 
Monticellia nov. gen.: — Head small, suckers without accessory 
areola. No rostellum. Testes, vitellaria and uterus entirely outside the 
inner longitudinal muscle-sheath. Vitellaria composed of scattered fol- 
licles which form broad lateral fields. Testes numerous, forming a 
single broad dorsal field between vitellaria. Uterus ventral, with many 
lateral pouches. Genital pore marginal, irregularly alternating. Ovary 
bilobed. In Siluridae. 
T. coryphicephala Monticelli is the type of the genus. Here also 
belong 7. diesingii Monticelli, 7. macrocotylea Monticelli and probably 
T. malopterurt Fritsch which seems to have more affinities with this 
genus than with Proteocephalus. Specimens of the three species des- 
cribed by Monticelli have been restudied and redescribed in the mono- 
graph which is soon to appear. 
Monticellidae nov. fam.: — It is necessary to form a new family 
to contain the new genus Monticellia. The chief characters are: — Head 
small. Suckers without accessory areola. Sexual organs as in the type 
genus, Monticellia. 
The species remaining in the genus Proteocephalus, sensu latu, after 
the removal of the species of Monticellia may be readily separated into 
two groups on the basis of the distribution of testes in two narrow lateral 
fields or in a single broad field. The reptilian and amphibian cestodes 
fall within the first group and the fish cestodes in the second, and each 
of these groups may be further subdivided. The first is separable into 
the genera Acanthotaenia v. Linstow, Crepidobothrium Monticelli and 
Ophiotaenia nov.-gen., and the second into Choanoscolex nov. gen. and 
Proteocephalus s. str. 
The genera of the two groups above mentioned, together with the 
