COLLINGE : GENERATIVE ANATOMY OF AMALIA MARGINATA. 7 1 



posterior portion, the anterior lobe so typical of gagaies is almost 

 wanting. The posterior portion of the mantle is faintly marked with 

 dark lateral bands. Keel straight and prominent. Foot-fringe 

 yellowish-browfi, with darker lineoles, foot-sole yellowish-brown with 

 median plane distinct. 



Length in alcohol 35 millim. 

 Habitat. — Santa Cruz and Orotava, Tenerife. " Fairly abundant 

 under stones." (Lt.-Col. G. S. Parry). 



ac. gl. 



— sp. A 



h. gl 



Generative system of Amalia marginata, Drap 



ac. gl. — Accessory gland, 

 alb. gl. — Albumen gland. 

 h. d. — Hermaphrodite duct. 

 h. gl. — Hermaphrodite gland. 

 ov. — Oviduct, 

 ov'. — Free oviduct. 



pr. — Prostate. 



r. — Retractor muscle, 

 r. s. — Receptaculum seminis. 

 sp. d. — Sperm duct. 



V. — Vestibule. 

 V. d. — Vas deferens. 



Anatomy of Generative System. 



There is a single vestibule to the side of which a large accessory 

 gland is connected. This organ is bilobed, the inner lobe being the 

 smaller of the two. In the example figured by Simroth* (T. x., fig. i, 

 xiii. B.) the two lobes are distinct from one another. These 



* Zeit. f. Wiss. Zool., 1885, Bd. xlii., pp. 203-366. 



