COLLINGE : NEW SLUGS FEOM ALGIERS. 



337 



lella, Heyneman. The markings are rather larger and more blotcliy 

 than in Fischer's variety. 



4. Akioist hortensis, Fer. (?). 



It is somewhat doubtful whether or not this is A. hortensis. 

 Externally the colour is very like a form of A. hortensis I have seen 

 fx'om the south-east of France. This form, however, differs slightly. 

 It is much broader and higher than hortensis, and the caudal mucous 

 pore is very large. Unfortunately the internal organs are not in a 

 condition that would lend any assistance ; I am, therefore, placing 

 it under A. hortefisis with a query. 



EXPLANATION OF PLATE XXIII. 



Fig. 1. Amalia ater, sp. nov. 



2. Mantle of same, showing form of groove. 



3. a. Dorsal ^dew of shell, b. Side view. 



4. Portion of generative organs. Lettering as below. 



5. Sperm-duct enlarged. 



6. Amalia maculata, sp. nov. 



7. Mantle of same, showing form of groove. 



8. Generative organs. The sperm-duct, sp.d., has been removed a little to 

 the riffht. 



