1910] 



The Palpi of Male Spiders 



171 



hcEmatodocha from the fact that at the time of pairing it is 

 distended with blood (Wagner '97). The wall of the hasmatodo- 

 cha appears to consist of elastic connective tissue ; hence the name 

 spiral muscle applied to it by Menge is inappropriate. In fact 

 no muscle tissue has been found within the genital bulb. As 

 similar extensible blood-sacs are present in more distal parts of 

 the bulb of many spiders, I suggest that this one be termed the 

 basal hcematodocha. 



emd. 



a. d. 



m.d. 



b.d. 



■ emb. 



cym. 



Fig. 10. Expanded bulb of Linyphia 

 phrygiana. 



Fig. 11. Palpvis cf Linyphia phrygiana 



The subtegulum. — The proximal end of the basal haemato- 

 docha is attached to the cymbium, the distal end, to a ringlike 

 sclerite, for which I propose the term subtegulum (Fig. 10, 

 s. teg.). The existence of a sclerite in this position was indi- 

 cated by Wagner, and it is lettered in his figures 5-. teg., but its 

 ringlike form has not been described; in fact, Wagner states 

 that the haematodocha ends in the tegulum. 



The middle division of the bulb. — The middle division of the 

 bulb (Fig. 10, m. d.) is that part which contains the chief portion 

 of the receptaculum seminis, the reservoir; its wall is the tegu- 

 lum. and it bears an appendage, the median apophysis. 



The tegulum. — The term tegulum was applied by Wagner to 

 all of the more densely chitinized parts of the wall of the genital 

 bulb; but as it is desirable that the different sclerites should 



