14 COLLINGK : NOTES ON SLUGS AND SLUG-LIKE MOLLUSCS. 



Fiji. 3.— Di-iscction of dart-sac to show the lleshy dart. 



Figs. 4 and 5. — Dorsal and lateral views of incompletely formed spermatophore. 



Kkkekknck Letteks.— (/. Dart, ic.d.s. Wall of dart-sac. 



NOTES ON SLUGS AND SLUG-LIKE MOLLUSCS.* 



Bv W.ALTER E. COLLIXGE, M.Sc. 



5— On a new and interesting genus of Slugs. 



.Sonic short time ago I received frcjm Profes.sor Plate of Berlin, a very 

 inlerestin,u collection of .slugs, numbering upwards of a hundred specimens, 

 mostly belonging to the genus Vi^ronirelhi, Blainville. Amongst these are 

 three slugs, which at first sight I thought belonged to the genus Atopot^, Simr., 

 but on opening the bottle in which they were contained with some specimens 

 of Ve/rmicella, it was at (jnce evident that I had before me a slug which 

 could not be referred to any known genus. Unfortunately Dr. Plate does 

 not know where the specimens were collected : there is one large example 

 and two much smaller specimens. 



Externally the large specimen, which measures 75 millim., in length, 

 looks somewhat like a unicoloured Atoiios ; it is a dirty sepia-brown in colour, 

 very slightly keeled posteriorly, the tail end attenuated and the foot-sole ex- 

 tending a little beyond the dorsum, On the sides of the dorsum are a series 

 of seven or eight obliquely directed grooves, rising from the perinotum, and as 

 these pass in a backward direction on the sides of the dorsum they divide 

 in a dendritic manner into finer grooves. 'J he generative orifice is situated 

 on the right side, close to the foot-sole and 44 millim. from the posterior end 

 of the body. The teeth of the radula are as in Vf^nmirclla. 



* See ante, 1903, vol. x, p. 17. 



