NKW .NfAr.T.OrMIA«'iA. 107 



tlie greatest ditticulty made out to l>e celU. He fouinl 

 tlie outer organs mostly tilled with fat-like drops. 



Both Kramer and Grosse describe a second set of 

 salivary glands found only in the Ischnocera. Kramer 

 described those of Li/mirus jcjanus as consisting of a 

 group of fourteen cells attached to the smaller of the 

 two glands just described. He could find no ducts con- 

 nected with them, but, since they were always present 

 and constant in })osition and arrangement, he still 

 regarded them as having a saliva-secreting function. 

 Grosse observed them in the genera Xirmus, Trlcho- 

 dedefi, and />//>e»rn.s\ He found, however, that they 

 occurred not only on the crop but also in groups of two, 

 six, and eight, connected witli the fat body. On this 

 account, and since he also could discover no duct in 

 connection with then, he concluded that their function 

 as salivary organs was very doubtful. 



In Trichodedes geomydis there can be no doubt of this 

 glandular nature, for here ducts can be very easily 

 observed. It" the alimentary canal be removed from 

 the body and transferred to a glass slide, two sets of 

 large cells may be seen attached to the anterior end of 

 the crop. Each set consists of seven cells, each pro- 

 vided with two large, internal bodies, apparently 

 nuclei. The cells are polygonal and situated close 

 together. By detaching the mass from the crop and 

 rioatintr it out in water it mav be seen to be connected 

 by a very distinct duct with the upper end of the neck 

 of the crop, close to where it joins the (.esophagus (j)late 

 xi, fig. 10, (/). This is long enough to allow the glands 

 to lie on the upper end of the crop. On passing the 

 glands under a cover-glass the loosely united cells 

 spread ajuiri and there may be seen very clearly a ram- 

 ification of the main duct passing to each one of them 



