96 WILLIAM BLAXLAND BENHAM. 



as I may have counted annuli by mistake for somites. The 

 side of the fossa is formed partly by two rather prominent 

 papillae (f,f), one of which is formed on somite xvii and part of 

 somite xvi ; the other is formed by somites xix and xx; between 

 the two papillae the side of the fossa is formed by somite xviii, 

 which dips down into the fossa at a level with the base of the 

 papillae. 



The papillae are in a line with the ventral couple of setae, 

 though I could see no setae on the papillae themselves, and 

 there are no special or " penial " setae connected with this 

 region. Each male pore lies at the base of a papilla, giving 

 four male pores as in Acanthodrilus. 



The pores of the spermathecae, though not visible externally, 

 lie in somites vii and viii in a line with the ventral setae in the 

 posterior region of the somites. 



Internal Anatomy. — None of the septa are particularly 

 thick, but those in the anterior region are slightly stronger 

 than the more posterior ones, and tend to hide the gizzard. 



The alimentary tract (fig. 33) consists of a short buccal 

 mass, a pharynx which passes through five somites, oesophagus, 

 three gizzards and the intestine. A short oesophagus leaves 

 the pharynx and passes through somite vi ; in somite vii it 

 widens out and enters the first gizzard, in somite viii the 

 anterior region of the somite is occupied by a thin-walled 

 oesophageal portion, and the posterior region by a second 

 gizzard. The same arrangement is repeated in somite ix. 

 Behind each of the gizzards is placed a slightly thicker septum ; 

 each gizzard has the usual structure and is quite separated 

 from the neighbouring gizzards. The tubular intestine com- 

 mences in somite x, and extends through this and the two fol- 

 lowing somites. In somite xiii the intestine becomes rather 

 larger and as it passes through the septa is slightly constricted. 

 This forms the sacculated intestine. There are no oesophageal 

 nor intestine glands such as are found in Lumbricus, 

 Microchaeta, Urobenus, &c., but there are three pairs of 

 '^ grape-like glands'' around the pharynx and oesophagus, a 

 pair in each of the somites iv, v, and vi. These organs are 



