COCKERELL AND COLLINGE : CHECK-LIST OF SLUGS. 209 



367 /. rupicola. Pollonera cites this as a doubtful species ; it has 

 been thought to be a form of A. rufus. 



Very likely both this and bicolor, Broeck, really belong not 

 to A. rufus but A. subfuscus, especially as Pollonera says he 

 had some young subfuscus from France agreeing w\t\\ bicolor. 



371. sulcattts. I give this sub-specific value, as it differs somewhat 



from rufus of Central Europe. Simroth's empiricorum war. 

 bocagei should probably be placed under sulcatus, in which 

 case the bocagei-like forms (mulleri, &x.) of rufus must be 

 separated from it. The question is whether we are to 

 regard the name bocagei as applying merely to the peculiar 

 colour of that slug, or to colour plus such slight structural 

 differences as pertain to the Portugese race. So far as 

 observed the pale-backed forms of sulcatus (bocagei) and 

 rufus (mulleri, <\x.) are not strictly identical, as may very 

 well be seen by comparing the figures of Simroth and 

 Scharff ; and it seems very possible that rufus proper does 

 not produce a colour-variety exactly like bocagei, nor sulcatus 

 one like mulleri. 



1 have examined several examples of sulcatus in the 

 British Museum, which were obtained by Mr. E. A. Allen. 

 They are dark brown in colour. 



372. fuligineus. If it could be proved that this was lusitanicus, of 



course it has priority. Pollonera suggests its affinity with 

 subfuscus — but that species appears not to be found in 

 Portugal. Simroth thinks it may be an immature form of 

 lusitanicus, or a closely allied species. 

 372 e. simrothi. A small race from the Azores, which should 

 probably be regarded as a sub-species. See Simroth, 

 Archh'. f Nat., 1888, p. 227, and Port. Azor. Faun., 

 Taf. 4., figs. 12-13. 

 375. nobrei. Five specimens from Portugal in the British Museum 

 (E. A. Allen) appear to belong to nobrei. but they vary 

 among themselves. One seems like sulcatus, only black 

 with a plumbeus sole ; the other four have the rugae divided 

 more transversely, after the manner of ater. The exact 

 particulars are as follows : — 



1. Black, mouth pale, sole plumbeus, unicolorous, 



length 61 1 mm. 



2. Black, mouth pale, sole plumbeus, unicolorous, 



length 6 1 A- mm. 



3. Black, mouth hardly pale, sole olivaceous, length 



5 1 mm. 



