5 
a ee ea ol ag, ©, Se 
This/appears to be a ssuiee closely related to that found the previous year by 
Fachycycloys &nvlicornis 
Dr. Wilgon in another syclops; (of which drawings of the head were prepared and concern~ 
ing which the notes declere the head to have been removed and set on end; no end view 
drawing, however, appears yet to hate been made). 
Returning now to the appearance from in fronti- In this view the submedian pap- 
Allee appear to be flatter than in eny other view, in fact appear only about one-third 
to one-fourth as high ae they are wide. - At the summit of the papillae there appears 
se he < Abtening of the cuticle, indicating probably the presence of a minute pore or 
Annaryetion, probably, the latter. The specimen was fixed with Fleming's solution ) 
andthe front part of the mandibles ‘appears darker than any other portion of the object, 
BO that thie view enphaatses the impression that thie portion of the mandibles: is solid. 
Following the pharynx backward until the triquetrous arrangement of ihe oesophages! 
Lining comes into view there ie no appearance of neymmetry, BO that if the two mand 
— $bles are the eat of an elimination of a doreal elenent in the pharynx, this elim- 
= ination ie very complete. 
 OBGOPHAGUS. The tissues extending forward from the seecobakch are sonewhat wider 
around the pharynx, hough this expansion would hardly. be denominated a pharyngeal 
‘bulb. At the base of the pharynx ess simple, vaiveless. oesophagus is about three- 
fifthe, at the serve-rins a liggle more than one-third, and finally nore than Lhree- 
fourthe, as wide as the corresponding portion of the neck. There is no distinet post- 
erior oesophageal ewelling, but there ie a distinct increase in the rate at which the 
organ enlarges in its posterior fourth. The musculature of the oesophagus appears 
‘somewhat as if soiseniked: the distance between the marks denoting the “segments” be~ 
ing abpit eqial to one-sixth the diameter of the neck. These markings are more die- 
@intt at the axis of the organ, become less distinct near the nerve-ring, and are 
faint or non-existent in the anterior part of the organ. The dining of the oesopha- 
gue ie a distinct feature throughout ite length and finds ite main optical expression 
ae a single somewhet sinuous or zig-zag element extending along the axis. The outer 
covering of the oesophagus is rather unusually thick and refractive, and the o¢soph- 

