270 T. B. ROSSETER ON DRBPAMDOTABNIA UNDULATA (KRABBE). 



nomenclature of this tapeworm. The reason for his so doing is 

 because Dujardin, in his Histoire des Helminthes (p. 565, no. 21, 

 nl. 9, fig. x ; p. 5G9, no. 2G, pi. 9, fig. h), confounds Taenia angulata 

 with Taenia undulata and vice versa. This is demonstrable by 

 the hooks, as the number, size, and characteristics of the hooks 

 of Dujardin's T. angulata are coincident with those of Krabbe's 

 T. undulata. If reference is made to Fig. 11, a, b, and Fig. 12, a, b, 

 it will readily be seen that Fig. 11, a, Dujardin's T. angulata, 

 and b, Krabbe's T. undulata, belong to one and the same species. 

 Also that Fig. 12, a, Dujardin's T. undulata, and b, Krabbe's 

 T. angulata, have the same application. Again, Dujardin says 

 of his T. angulata, " Avec une trompe entouree de quarante 

 crochets, long de 0*09 — 0095 mm : " ; whilst Krabbe says of his 

 T. undulata, " Uncinulorum, 46 — 64; corona duplex." Of his 

 T. undulata, Fig. 12, a, Dujardin says, "Une trompe avec une 

 couronne simple de dix a douze crochets, long de 02 mm., tres 

 courbes " ; whilst Krabbe's description of T. angulata, Fig. 12, b, 

 is, "Uncinulorum 10 (9 — 11); corona simplex, quorum longit. 

 0*020 — 0*025 mm." The Taenia serpentulus of Schrank, referred 

 to by Dujardin and Krabbe. the latter thinking that Dujardin 

 mistook T. serpentulus for T. angulata, cannot possibly in either 

 case be the T. serpentiformis of Goeze (T. undulata, Krabbe), 

 because the T. serpentulus referred to above has the corona 

 " simplex " ; whilst Goeze says of his T. serpentiformis, " Und 

 baren oben em doppelter hakenkranz " (Goeze, Versuch einer 

 Naturgeschichte, etc., p. 392) ; and although he figures on tab. 31a, 

 fig. 7, b, " der doppelte hakenkranz," unfortunately he does not 

 give us one of the " haken " on the double rows of hooks of the 

 rostellum, enlarged to enable us by this means to define his 

 species as Krabbe's T. undulata. This, however, is explicable, 

 as Rudolphi {Ent., part i., p. 167, no. 88, and part ii., p. 528, 

 no. 88) admits that to him the " hooks on the rostellum were 

 only incidentally to be seen." 



Professor Joseph Leidy, describing a tapew T orm taken from 

 Tardus migrator ius sent to him by Dr. Warren, of West Chester, 



