CYCLOSALPA RETRACTA, A NEW SALPOID FROM THE COAST OF JAPAN. 3 



Intestinal Trad. — Esophagus opening large with a prominent margin, 

 situated under the fourteenth body muscle band ; the funnel-shaped 

 esophagus extending forward and ventralward to enter the stomach, which 

 is situated under the twelveth and thirteenth muscles. Stomach with a 

 prominent lobe on left side somewhat compressed, the apex directed 

 dorsalvvard. Intestine proper springing from the posterior margin of 

 stomach near the entrance of the esophagus, running backward with slight 

 upward curvature at the anus, to beyond the last body muscle Intestine 

 of nearly uniform diameter throughout. The whole digestive tract 

 situated on the extreme ventral side of the body, in fact so close as to 

 cause a bulging of the body wall in this region. 



Proliferous Stolon. — Straight, directed forward, issueing from the 

 body by a small pore a short distance in front of the stomach. 



A peculiar structure, fig. 2, x . concerning the nature of which I am 

 quite in the dark, is clinging to the left side of the animal. This is 

 uniformly cylindrical and flaccid. In the orginal condition it was about three 

 and one half cm. long, and about two mm. thick. The proximal end is 

 firmly embedded in the test to the extent of nearly one cm. the tip being 

 but a short distance from the esophageal border of the stomach. A 

 delicate strand seems to pass off from near the tip toward the intestine ; 

 but to have undertaken to make out the nature of this would have required 

 more dissection of the specimen than seemed wise until more material is 

 secured. Microscopic examination of this cylinder showed it to consist of 

 a thin outer membrane constituting a long sac, apparenetly closed at both 

 ends, this sac being filled with spherical cells of uniform size, seemingly 

 not connected with the wall of the sac. These cells resemble sperm 

 mother cells, but in view of the position of the organ, a id especially of 

 its presence in connection with an individual of the asexual generation, it 

 can hardly be supposed to have any thing to do with the male reproduc- 

 tive apparatus of the species. For the present we must, I think, regard 

 the puzzle as a foreign body of some sort. 



Pending a more detailed study of the species upon a larger number of 

 specimens, and especially upon specimens of the aggregate generation, 



