COLLINGE : A NEW SPECIES OF ANADENUS FROM CHINA. 135 



leading into a short, wide crop, whicli, with the narrow tube-hke 

 portion immediately beyond, forms the first loop of the intestinal 

 tract. Posterior to this is the bilobed stomach which is situated on 

 the right side of the "liver." The second loop of the intestine passes 

 to the left side, slightly ventrally, and proceeding forwards makes a 

 turn to the right, at the anterior end of the crop ; passing backwards 

 again on the left side, as loop number three, it becomes sharply 

 folded upon itself, forming loop four, which, as the rectum, leads to 

 the anus. 



It will be noticed that loops 3, 4 and 5 all lie dorsally to the crop 

 and stomach, excepting the sharp folded portion at the junction of 

 loops 3 and 4. 



Pedal Gland (PL vi, fig. 8). — This is a small lobulated organ, 

 10 mm. in length. The figure sufficiently explains the general 

 appearance. 



The Generative Organs. — Owing to some unknown cause these 

 were not in a fit condition either to dissect or figure, the different 

 parts broke away as lifted by the forceps, or even when moved with a 

 needle. The penis and free oviduct were in a slightly better condition 

 but still unsatisfactory. Had I been able to figure and describe the 

 whole of the generative system, I expect they would have shown some 

 striking differences from those in the two above mentioned species of 

 A^iadenus. If this had been so, I should not have hesitated to place 

 A. dautzenhergi in either a new genus or subgenus. In quite a 

 number of characters it differs considerably from Anadenus, as at 

 present known, particularly in the form and disposition of the 

 alimentary canal, the shell, jaw, and pedal gland. 



EXPLANATION OF PLATE VL 



Anadenus dautzenhergi, n. sp. 



Fig. I. View from the right side. x 2. 



Fig. 2. Dorsal view. x 2. 



Fig. 3. RugLt enlarged. 



Fig. 4. Shell, a Viewed from above, h. Viewed from below. X4"5. 



Fig. 5. Jaw. X 8. 



Fig. 6. Lateral view of the buccal cavity. 



Fig. 7. Alimentary Canal. 



Fig. 8. Pedal Gland. x 2. 



Reference Letters. 



h.c. Buccal cavity. r. Rectum. 



cr. Crop. r.m. Retractor muscle 



int. 1-4. Intestine. s.d. Duct of salivary gland. 



oc, CEsophagus. st. Stomach. 



