CHINESE EARTHWORMS — GATES 423 



internal organs in part disarranged and softened. Five of Kellogg's 

 specimens had also been opened.) 



Septa 5/6-7/8 are thickly muscular, as are 10/11-13/14; 8/9-9/10, 

 lacking. 



There is a small but very distinct glandular collar (smooth, with- 

 out lobulations) on the esophagus just behind the gizzard (3 speci- 

 mens). The intestine begins in xv (3 specimens). The intestinal 

 caeca are simple, more or less finger-shaped, and directed anteriorly. 

 Both dorsal and ventral margins may be incised. The incisions vary 

 from fairly slight to deep. The height of the secondary lobes may 

 be much less than the dorsoventral thickness of the primary portion 

 of the caecum or greater. In the latter case the secondary lobes, or 

 caeca, are finger-shaped, and the entire caecum might almost be 

 regarded as compound. The secondary lobes, however, are not di- 

 rected anteriorly as in a glove-shaped compound caecum, but dorsally 

 or ventrally. If both dorsal and ventral margins are deeply incised 

 the depth of the incisions decreases passing posteriorly on the dorsal 

 margin but increases on the ventral margin passing posteriorly. 



The last pair of hearts is in xiii (3 specimens). There may be a 

 single commissure belonging to ix on the right or the left side, or a 

 pair of commissures. The hearts of x are closely bound against the 

 anterior face of 10/11 by connective tissue and if empty may be 

 difficult to find. All hearts of ix-xiii pass into the ventral vessel. 



The testis sacs of x and xi are unpaired and ventral (A, C, 

 and Kellogg's specimens). The seminal vesicles of xi and xii are in 

 contact transversely above the dorsal blood vessel. Each vesicle is 

 provided with a primary ampulla the height of which may equal the 

 height of the ventral lamina. The primary ampulla may be conical 

 or columnar; the base may be merely constricted off from the ventral 

 lamina, or the base may be wedge-shaped and sunk into the dorsal 

 margin of the ventral lamina. In two specimens the primary ampul- 

 lae are filled with parasitic masses, while none of these masses are 

 present in the ventral portions of the vesicles. There are paired 

 pseudovesicles in xiii and xiv, the vesicles of xiii about half the size 

 of the vesicles in xii but about twice the size of the vesicles of xiv 

 (3). The pseudovesicles of xiii of one specimen contain parasitic 

 masses. 



The prostates extend through xvii or xviii-xix or xx. The pro- 

 static duct is 13-16 mm long, tapering gradually at each end, bent 

 in an S or W shape. A middle portion about 7-9 mm in length is 

 much thickened. In Kellogg's specimens the ducts are J- or U- 

 shaped, the ectal limb of a loop thickened. 



The spermathecal duct is stoutish, narrowed only in the outermost 

 layers of the parietes. The diverticulum is about as long as or 

 longer than the combined lengths of duct and ampulla. 



