NEW SPECIES OF OCNERODRILUS. 249 



Ocnerodrilus guatemalae u. sf. Fig, 6i, 62, 63, 64, 

 65, 66, 76. 



The cliteUuni is small from somite xiv to xviii. 

 The body is long, slender, of even thickness throughout, 

 with a glossy lustre, and of dark opaque brown when 

 preserved in alcohol. In this it differs from O. agn'co/a, 

 which always preserves its Hght and semi-transparent 

 color. The size is about one and a fourth inch by three- 

 fourths line long, of course with some variations. It is 

 one of the longer and slender worms. 



The septal gland in somite v is almost twice as long as 

 the one in somite vi. It is deeply lobed ; this is also the 

 case with the other glands. The size of the anterior 

 gland is very characteristic. The gland in somite vii is 

 much smaller, and resembles, in its proportions to the 

 surrounding glands, those of Ocnerodrilus Hendriei , from 

 which it, however, differs in the lobing of the glands. 

 In O. Hendriei th.QY are almost entire, while in the pres- 

 ent form they are deeply lobed. The glands in vii and 

 viii are small, of almost equal size, but the one in vii, 

 as usual, is the smallest of the four. 



The sfermatheca is very small, the smallest found in 

 any species. In fully matured specimens the height 

 of the spermatheca is not quite equal to the width of the 

 oesophageal diverticulum. The form is very much like 

 that of O. sonorcB, but the size is even smaller, and as it 

 is generally lying flat against the parietes, it may be easily 

 overlooked. The lower part of the spermatheca is nar- 

 rower than the corresponding part in O. sonorce, and the 

 whole organ is darker and more opaque. There is only 

 a trace of diverticula, the wall being slightly sacculated. 

 This species stands near O. Beddardi, sonorce and 

 Hendriei, but its characters appear very constant, in 

 specimens collected several hundred miles apart, and I do 

 not hesitate to classify it a well-defined species. 



