CHINESE EARTHWORMS — GATES 429 



There is a pair of hearts belonging to ix in 2 specimens ; the single 

 heart of ix on the left side (4 specimens), on the right side (3 speci- 

 mens). The last pair of hearts is in xiii (9 specimens). All hearts 

 of ix-xiii pass into the ventral blood vessel (4 specimens). 



The testis sacs are unpaired and ventral (9 specimens), the sac 

 of X often with a bilobed anterior margin. 



The prostates extend through xvii-xix or xx. The prostatic duct 

 is 2-4 mm long. An ental portion, varying in length from 2 to 3 

 mm, is thickly muscular, nearly straight or slightly bent into a sort 

 of crescentic curve. An ectal portion, about 1 mm in length, is very 

 slender but firm and bent into 1-3 tiny U-shaped quirks, which are 

 covered over by connective tissue ; only the thickly nuisculur portion 

 of the duct visible on first opening the worms. 



The copulatory chambers, when completely retracted, protrude 

 rather conspicuously into the coelomic cavity. A very large portion 

 of this coelomic protuberance is composed of connective tissue and 

 the tiny ectal quirks of the prostatic duct. In those specimens on 

 which the apertures of the chambers gape open the lumen of a 

 chamber does not extend internally beyond the level of the coelomic 

 face of the parietes and the male pore chamber appears to be simply 

 an invagination of the parietes. In 2 specimens with chambers 

 (apparently) fully retracted and with chamber apertures shut tight 

 the lumen of the chamber appears to extend internally dorsal to 

 the level of the coelomic face of the parietes though only slightly, 

 while ectally the lumen is narrowed as if by a sphincter. The male 

 pore invagination is accordingly termed a copulatory chamber. The 

 actual protuberance (of the chamber not including the quirks of the 

 prostatic duct and the connective tissue) is, however, so slight that 

 it may be preferable to call the chamber a parietal invagination. 



The spermathecal duct is narrowed in the parietes, the thicker 

 coelomic portion about as long as or slightly shorter than the ampulla. 

 An ectal portion of the ampulla is so firmly bound by connective 

 tissue around the ental portion of the duct that the duct appears to bo 

 invaginated into the lumen of the ampulla. The diverticulum com- 

 prises a short stalk, which may be nearly as thick as the duct, and 

 a longer and slightly thicker seminal chamber. The latter is nearly 

 straight, twisted, looped, or bent in various ways. 



Remarks. — The U. S. National Museum specimens from Szechwan 

 are brittle and broke into pieces in the course of dissection. 



There is nothing whatever in Beddard's account of his sandvicensis 

 to indicate specific distinction from calif omica (types and the Hong- 

 kong specimens). If Beddard's specimens cannot be found, sand- 

 vicensu will have to be regarded as a synonym of calif (yrnica. 



