ON CTENODEILUS PARVULUS. 603 



EXPLANATION OF PLATE XL, 



Illustrating Dr. Robert ScharflF's paper on "Ctenodrilus 

 parvulus/' nov. spec. 



Fig. 1. — View of Ctenodrilus parvulus (highly magnified, somewhat 

 diagrammatic). mo. Mouth. a. Anus. s. o. Segmental organ. d. v. 

 Dorsal vessel, v. v. Ventral vessel, oe. (Esophagus, si. Stomach, br. 

 Bristles, en. Enigmatic organ. M. Intestine. 



Fig. 2.— One of the bristles of Ct. parvulus (highly magnified). 



Fig. 3. — Fissiparous reproduction of Ct. parvulus (Ct. pardalis is 

 quite similar; see text). «. First stage, i. Second stage, e. Third stage. 



Fig. 4. — Fissiparous reproduction of Ct. mono stylos, a. First stage. 

 b. Second stage, c. Third stage. (Copied from Zeppelin.) 



