1896.] MICROSCOPICAL JOURNAL. 305 



From five to ten minutes' labor will suffice to prepare 

 almost any specimen of mineral or metal for inspection 

 under any microscope that will admit of a beam of con- 

 densed direct light being used between tlie lens and the 

 polished surface, where the specimens are too tliick for 

 permitting tlie use of transmitted light. 



A New Species of Tenia. 



Dr. H. B. Ward, University of Nebraska, reports a new 

 species of human tape-worm ( Wester7i Medical Review) 

 to which he gives the name Tenia confnsa. His descrip- 

 tion of the parasite is as follows : Thus far only two spe- 

 cimens of this species have been seen, and both were taken 

 from residents of Lincoln. One of them has been almost 

 entirely destroyed in making slides and sections, but the 

 other is still nearly entire, and from it were taken the 

 general measurements which are given in the following : 

 The total length of this specimen must have been about 

 500 cm. The terminal proglottids, just ready to be sep- 

 arated, are from 5 to 3.5 mm. in width. They are, as 

 represented in Fig. 1, of nearly uniform breadth through- 

 out their entire lengtli, save that close to the end a prom- 

 inent widening is found, to which the subsequent proglot- 

 tid is attached. The sexual pores is easily seen, though 

 it does not project markedly beyond the margin of the 

 segment. One meter anterior to the end of the specimen 

 the proglottids measure 15 mm. long and 7.5 mm. wide, 

 and a meter further anterior they are just about 9 mm. 

 square. In the anterior third of the worm the segments 

 are 4.5 mm. long by 3.5 mm. wide, and near the anterior 

 end 1 to 1.2 mm. long by 0.8 to 1 mm. wide. In general 

 then, it may be said to be much slenderer than Taenia 

 saginata, never attaining the broad form which is so 

 striking near the middle of the chain in specimens of this 

 latter species. Cross sections show that the new form is 



