MOLLUSCA FROM JUAN FERNANDEZ AND EASTER ISLAND 245 
Likewise, the male apparatus in /ernandesza is situated entirely above the 
retractor oculi, and consists of a large appendix, though shorter than in the 
genus mentioned. In half its length, this appendix carries a rounded diverticle 
with thick walls folded inwardly, and the hind-end of the appendix is furnished 
with a narrower flagellum attaining about the length of the preceding portion. 
From the base of this flagellum there issues a strong retractor backwards; it 
gives off a finer cord to the penis papilla, and then farther back inserts the 
diaphragma; it does not join to the columellar muscle. 
The genital aperture is situated between tentacles and mantle margin, but 
decidedly nearer to the latter. 
In a young specimen of Fernandesia bulimoides, which had not attained 
sexual maturity, the vesicula seminalis was rather short and had the shape of 
a flexed coecum, the end of which was embedded in the columellar muscle. 
For this reason, it is evident that the shape and the direction of the vesicula 
in the adult animal is a secondary acquisition peculiar to the Juan Fernandez 
genera of Tornatellinidae, and no primitive character. 
Fam. Succineidae. 
Succinea fernandi Reeve. — Masatierra, Aug. 1917: Tierras blancas, dead 
on the sand, 3 shs., max. h. 9,7, whorls 31/2. — El Puente, about 50 m above 
sea, dead on the sand, 2 shs., max. h. 11, wh. 37/2 (aperture wide). The shells 
agree with REEVE’s fig. 37 (Conch. Icon. 18) in their produced and contorted 
spire, which is slender than in the following species; further, the apex is much 
more minute, so that the number of whorls is greater in shells of equal size — 
S. texta of 9,7 mm height has only 27/3 whorls. Also, the sculpture offers a 
good distinguishing mark, inasmuch as the present species lacks the crossing 
striation of S. ¢exta and exhibits only faint and irregularly running microscopic 
spiral striae. The colour, further, is light yellowish. 
Succinea texta n. sp. Pl. 9, figs. 50—52. — Shell oblong ovate, with 
moderate spire (about half the aperture) rather solid, of a dull reddish-brown 
or greenish horn colour. Whole surface sculptured with wavy microscopic 
striae of two systems, each running obliquely to the lines of growth, and crossing 
each other at about right angle; lines of growth forming irregular coarse, more 
or less prominent, rugae. Maximum dimensions: height 18,5, h. of aperture 13,5, 
br. 11,5 mm; whorls 3?/2. 
The texture-like sculpture (figs. 51, 52) of this species is very characteristic, 
and serves to distinguish it from the preceding, from which it differs, further, 
in its broader apex and rapidly increasing whorls. A similar sculpture is present 
also in other species of Swccinea, at least in some Pacific ones, such as S. papzl- 
lata from Tahiti and S. pudorina from Hawaii (specimens in RM.). 
This species may certainly be S. fragilis King, mentioned by E. A. SMITH 
(1884), from Juan Fernandez, a species living in Hawaii, and different in its 
broader spire; the coarse rugae are, however, similar. 
Localities: Masatierra, Aug. 1917: El Puente, dead in sand, 4 shs., max. 
