20 



After 15 years A. Adams') described as two new species of Agadina^ two forms, the 

 shells of which arc, however, really sinistral. 



The Challenger-material has given occasion to Pelseneer to show, that these "s])ecies" 

 of Adams (and still another Agadina-ioxxw found by the Challenger) were only Gastropod larvae. 



The Siboga has also collected some "species" of Agadina. 



I. "'Agadina' stimpsoni A. Adams. 



1867. Agadina stimpsoni A. Adams, Description of new species of Shells from Japan, Proc. 

 Zool. Soc. London, 1867, p. 309, pi. XIX, fig. 23. 



Living animals: 



Stat. 213. 5° 54.55., 120° 19'. 2 E. I spec. 



Stat. 215". 6° 30' S., 121° 55' E. 2 spec. 



Stat. 225. Near the Lucipara Islands, i spec. 



Stat. 243 



Stat. 245 



Stat. 282 



Stat. 304 



4°3o'.2S., 129° 25' E. 2 spec. 



4° i6'.5 S., i30°i5'.8E. i spec. 



8°25'.2S., i27°i8'.4E. I spec. 



Lomblen Island. I spec. 



The bell-shaped margins of the shell are slightly brown-coloured. I stated, as Pelseneer 

 has done too, that this Agadina-ionw is only a larva, as I found a four-lobed velum on the 

 head, and a broad foot, which carries the operculum. 



I 



2. ^Agadina" n. sp. (Pelseneer). 



1888. Agadijia n. sp. Pelseneer, Pteropoda Thecosomata. Challenger Rep. LXV, p. 39, 

 pi. I, figs. 15 — 16. 



Stat. 157. o°32'.9S., I30°I4'.6E. i spec. 

 Stat. 213. 5°54'.5S., 120° 19'. 2 E. i spec. 

 Stat. 225. Near Lucipara Islands, i spec. 



I myself did not study the animal, but according to Pelseneer, it carries on its head 

 a four-lobed velum and is doubtless a Gastropod-larva. 



Another Agadina-iorm may be mentioned here. 



3. "■Agadina'' n. sp. (Pl. I, fig. 15). 



Stat. 215". 6°3o'S., i2i°55'E. i spec. 



The shell is left-handed, entirely transparent, with somewhat thickened margins; suture 

 well marked, deep; three whorls, spire somewhat projecting beyond the last whorl. Deep 

 imibilicus, as in "'Agadina" stiinpso7ii^ but without rays. 



Operculum, quite as in "■ Agadina" stimpsojii: left-handed, many turns slowly increasing. 



Animal with a four-lobed velum on its head. 



Dimensions; Height 0,75 mm.; max. diam. i mm. 



i) Proc. Zool. Soc, London 1867, p. 309. 



