198 



MR. F. E. BEDDABD OlST THE STRUCTUKE 



[Mar. 5, 



xviifcli segment and are close together like the spermathecal pores. 

 The integument surrounding them is raised into a ridge. From 

 each pore protrudes the everted end of the spermiducal glands. 



The oviducal pore — for there is only one — offers a most remark- 

 able case of asymmetry. In all three specimens there was but a 

 single pore present, that of the left side. This pore is very con- 

 spicuous and lies just in front of the ventralmost seta of the 

 fourteenth segment. There was no observable trace of a cori'e- 

 sponding pore upon the opposite side of the body. 



A dissection (shown in text-fig. 55) sketched without any in- 

 structions shows plainly that the oviduct of the right side is 

 abbreviated and only just reaches the body-wall. Naturally, this 



Text-fig. 55. 



P<^ 



' ^Pgl 



Typhoeus nicholsoni. Genitalia, X 3. 

 sp.s., sperm-sacs ; od., oviducts ; sp-gl., spermiducal glands. 



anomalous state of affairs was further investigated by section- 

 cutting; I found that the two oviducts had funnels of quite the 

 same size, but that the lumen of the right oviduct gradually 

 diminished, and that the tube ended blindly just at the body-wall, 

 which it does not perforate. The M'ide lumen of the left oviduct, 

 on the other hand, is very obvious where it perforates the body- 

 wall. 



Alimentary can«Z.— The gizzard appears to occupy both the 



