described as distinct species. One of these forms ( Taenia sciginata 
abietina) is of special interest to American physicians in so far that the 
only specimen ever taken was collected from an Indian in this country. 
It was first described as a variety of Taenia solium , but part of the orig- 
inal material has been reexamined, both by Leuckart and myself, and 
the characters found indicate that it is more closely related to Taenia 
saginata. Owing to the small amount and poor condition of the 
original material it is difficult to pass judgment upon the form; with- 
out further specimens, I should view it as a dwarfed specimen of 
Taenia saginata , but in order to direct special attention to it, in the 
hope that further specimens may be found, it is here accepted as a 
special form, leaving open the question as to whether it represents 
simply a variation, a variety, or a subspecies. One would scarcely 
be justified, at least at present, in giving it specific rank. 
Weinland’s Chippewa Tapeworm — TAENIA SAGINATA ABIETINA^ (Wein- 
land, 1858) Leuckart, 1886. 
[Figs. 35 to 38.] 
Subspecific diagnosis. — Tsenia ( Tseniarhynchus ) saginata: Length of strobila 
unknown; fragment measured “several feet in length.” Head, neck, and mature 
segments unknown, but from resemblance of uterus to that of T. saginata the head 
Fig. 35. — Strobila ol' Tsenia saginata abietina. Natural size. (After Weinland, 1861, fig. 18.) 
is assumed to be unarmed. Gravid segments very thin, nearly transparent, equally 
narrow, attain 12 mm. long by 4 mm. broad; calcareous corpuscles very numerous, 
round to oval, may attain 17.6 ju ; genital pore very small, about § of length of 
segment from anterior margin; uterus with straight median stem and 30 to 40 lateral 
branches each side, generally straight, “never arborescently divided nor furcated at 
the ends, with the exception of the foremost and hindmost in each joint, which run, 
the former forward, the latter backward, both being forked and crooked.” Eggs 31 
to 37.5 by 30 to 33.9 ju. 
a Synonyms. — Tsenia solium abietina Weinland, 1858; T. abietina Weinland, 1858, of 
Davaine, 1873a; Tenia abietina * (Weinland, 1858) Guzzardi Asmundo, 1885a; Tsenia 
saginata abietina (Weinland, 1858) Leuckart (Hoyle), 1886, 
