222 ILLINOIS BIOLOGICAL MONOGRAPHS [222 



varies so widely from that of Rudolphi and his list of hosts covers such 

 a range of families that his words are quoted in full : 



"Taenia racemosa Rudolphi. Caput magnum tetragonum, acetabulis angu- 

 laribus subterminalibus v. terminalibus, subovatis v. cordatis. Collum nullum. 

 Articuli supremi brevissimi, subsequentes longiores et latiores, angulis rotundatis, 

 ultimi longi parallelopipedi angustiores. Penes filiformes basi incrassati, margi- 

 nales vage alterni. Longit. 2" — i 1 // ', latit. med. 1 — 3"'; ultim. 1"'. 



"Taenia racemosa Rudolphi: Synops. App. 692 — Dujardin: Hist. nat. des 

 Helminth. 610. 



"Habitaculum. Ophiomorphus miliaris, Martio. — Eunectes Scytale, Octobri, 

 Februario et Junio. — Bothrops Mararacca, Martio et Aprili. — Ophis Merremii, 

 Januario, in Brasilia {Natterer) : in intestinis. M. C. V." 



Von Linstow (1878 :183) did no more than refer to Rudolphi (1819) 

 and Diesing (1850). Barrois (1898:3) was convinced that Taenia race- 

 mosa Rud. belonged to the genus Ichthyotaenia for he had examined a 

 head and some ripe proglottids "provenant du type primitif de Rudol- 

 phi." He did not describe the species. Liihe (1898:652) stated that 

 Taenia racemosa belonged to the genus Ichthyotaenia. Marotel (1899: 

 34) quoted Diesing 's (1850) description of this species which he stated 

 was too incomplete to permit a precise determination. Parona (1901: 

 3) reported some specimens collected by Dr. Adolf Lutz from Bothrops 

 (Lachnis) lanceolata, Sao Paulo, Brazil under the name of Ichthyotae- 

 nia racemosa Rud. These specimens which have been examined by the 

 writer prove to belong to the species Ophiotaenia calmettei Barrois. 

 Shipley (1905:101) reported some cestodes from Eunectes murinus 

 Wagler as Taenia racemosa Rud. Professor H. B. "Ward secured some 

 specimens labelled with this name from Mr. Shipley. Upon examina- 

 tion they proved to be specimens of Crepidobothrium gerrardii (Baird). 

 Schwarz (1908:28-29) secured some material from Barrois which the 

 latter had obtained from Dr. E. von Marenzeller of Vienna. He also 

 secured additional material from Dr. E. von Marenzeller. Upon this 

 material he based his description of Taenia racemosa Rud. He did not 

 definitely state the name of the host from which his material was col- 

 lected but evidently quoted Diesing 's (1850) list of hosts. La Rue 

 (1911:481) included this form in a list of species of the genus Ophio- 

 taenia. 



It is possible that T. colubri Rud. collected by Natterer in Brazil 

 from Coluber sp. is a synonym of T. racemosa Rud. also collected by 

 Natterer in Brazil from a species of Coluber. Rudolphi 's description 

 of T. colubri is insufficient to place the species, nor is there any data as 

 to exact host and locality that would fix it. Diesing (1850:558) states 



