UMAX MAXIMUS LINN.EUS 227 



tegument is rich in sensory cells. Many of these may be safely 

 interpreted as organs of touch although the most sensitive region 

 is on the anterior tentacles and around the mouth. The sense 

 of taste is localized in special cells of the lining of the mouth 

 cavity. The olfactory sense seems to be restricted to the pos- 

 terior tentacles. These tentacles are also the seat of a pair of 

 well formed eyes. As regards the sense of hearing, the matter is 

 not so simple. There is a pair of otocysts above the pedal ganglia. 

 They receive their nerves from the cerebral ganglia. They 

 serve as organs of equilibrium; but future investigation will 

 have to show to what extent the function of hearing also may be 

 ascribed to them. 



Reproductive system. Like all pulmonate gasteropods, 

 Limax is a hermaphrodite and its reproductive system is very 

 complicated. At the rear end of the visceral complex, surrounded 

 by the lobes of the liver, is a hermaphroditic gland with a long and 

 fine hermaphroditic duct. The gland consists of numerous lobes 

 but sperm and eggs never ripen at the same time. The animal 

 is, as we say, proterandric, i. e., it functions first as a male and 

 later as a female. The hermaphroditic duct finally divides, 

 giving rise to a rather spacious oviduct and a thin vas deferens. 

 The two ducts run in close contact with each other. The place 

 where the hermaphroditic duct divides is marked by the al- 

 buminous gland which opens into the oviduct and which attains 

 a considerable size when the animal functions as a female. The 

 last portion of the female duct is called the vagina and leads into 

 the vestibule or genital cloaca. The seminal receptacle which 

 functions as a bursa copulatrix and receives the sperm during 



nervus olfactorius and opticus; 3, nervus peritentacularis externus; c\, 

 nervus peritentacularis internus; 5, nervus acusticus; CQ, nervus labialis 

 internus; 7, nervus labialis medianus; c%, nervus labialis externus; CQ, nervus 

 penis; cp, cerebropedal connective; cpl, cerebropleural connective; PCC\, 

 PCCH, connectives of the pedal ganglia; pi~pg, pedal nerves; plpd, pleuropedal 

 connective ;/>//>, pleuroparietal connective; pig, pleural ganglion; pgi, pg%, 

 parietal ganglion; rg, visceral ganglion; vp, viscero-parietal connective; 

 vi, n. pallialis dexter externus; v%, n. pallialis dexter internus; 1*3, n. intes- 

 tinalis; i> 4 , nervus analis; v$, nervus cutaneus; VQ, n. pallialis sinister. 



