20 



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

 shells of which are, however, really sinistral. 



The Challenger-material has given occasion to Pelseneer to show, that these "species" 

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



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



1. '^Agadina''' stivipsoni A. Adams. 



1867. Agadina stiDipsoni 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° 54.5 S., 120° i9'.2 E. I spec. 



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



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



Stat. 243. 4°3o'.2S., 129° 25' E. 2 spec. 



Stat. 245. 4° i6'.5 S., i30°i5'.8E. i spec. 



Stat. 282. 8°25'.2S., i27°i8'.4E. i spec. 



Stat. 304. Lomblen Island. i spec. 



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

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

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



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



1888. Agadina 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 Agadiua-ionn may be mentioned here. 



3. "■Agadifia" n. sp. (PI. I, fig. 15). 



Stat. 215". 6°3o'S., 12 1° 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 

 umbilicus, as in "'Agadina ' sfiinpsoni^ but without rays. 



Operculum, cjuite as in "■ Agadina'' stimpsoni: 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 1S67, p. 309. 



