1901.] SPEEMAXOPHOEES OF BENHAMIA. 707 



glands and then to have been transferred to where it is fouiid. 

 This structure, liowever, is not all of the spermatophoi^e. The 

 fully-developed sperraatophore is built up of two pieces, of \Ahicla 

 the second has apparently the following origin, and has certainly 

 the following characters. Very constantly I have found in one 

 or other (not in both) division of the sperinathecal pouch, in the 

 thin-walled portion into which the duct expands (or rather opens, 

 for the minute structure of the two divisions is different), a siyall 

 chitinous case. This appears to have been seen and figured by 

 Michaelsen in Beahamia itiolensis. The structui'e in question has 

 au outline like a tear-drop (see text-fig. 93, p. 705) or the pendant 



Text-fio-. 94. 



S2?. 



Longitudinal section througli duct of speniiatlieca of Beiihaiuiu ausleni, 

 to show portion of spei'matophore in position. 



Sp., wall of spei'raatb.ecal duct. 



Ch., chitinous wall of spermatophore. 



of a cut-glass chandelier. It is usually, in fact, broader at one end and 

 narrower at the other, which is widely open. This small chitinous 

 case is gorged with sperm, and it has been somewhat of a problem 

 to me to understand how it is that the sperm remains inside. 

 I'or in many instances these small cases were so widely open at 

 the bottom— at the end, that is to say, which is turned towards the 

 spermathecal duct. AVhy the sperm is not shed through sheer 



