2 26 NILS HJ. ODHNER 



times the breadth), with the denticulated edge less than half the length of the 



tooth. Dimensions: 1. i6, br. 8,i, height 3,7 mm. 



Masatierra, 20—35 m, sand and Corallinae, ^7* ^9^7^ i sp., 1. 10 mm; 



30—40 m, same bottom, V^ 1917, 6 sps., max. 1. 16 mm. 



Of the fam. Cadlinidae only 

 two genera are previously known, 

 and the one of them, Tyrinna, 

 described by BerGH in 1898, is of 

 interest as being the nearest ally 

 of the new genus not only in 

 systematical respect but also as to 



Fig. 3. Teeth from the radulaof>««.//a./«r.an.sp. j^^ occurrence (at Calbuco; only 



one specimen of the single species, 

 T. nobilis, was kept). The common character is above all the unarmed penis, 

 and the chief difference lies in the shape of the tentacles, in which Tyrinna 

 shows a remarkable differentiation, whereas Juanella, in the furrow of the 

 external tentacle margin, shows an interesting parallelism to Doris. 



*Chroinodoris juvenca Bergh. — Masatierra, 30 — 40 m, sand and Coral- 

 linae, ^/4 1917, I sp., 1. 10 mm, together with Juanella sparsa. Like the typical 

 specimen, which measures only 7 mm in length (Bergh 1898), the present 

 animal has a radula with a 4-cusped median tooth and has all other charac- 

 teristics common to the type. 



*Euplocainus inaculatiis Bergh. — Masatierra, 10 — 35 "i> sand and Coral- 

 linae, ^^U 191 7> I sp., 1. 10 mm. Frontal papillae 8, dorsal papillae 4 on each 

 side, gills 5, back finely granulated, tail contracted, but indistinctly keeled. 

 Bergh's specimen was only 4 mm in length, had only 3 papillae on each side 

 of the back, 3 gills, and a smooth back. In spite of the differences thus existing, 

 the present specimen is certainly £". maculatus, the other Pacific species, E. pad- 

 ficus Bergh, being very different as regards the number of frontal appendices. 



Among the terrestrial mollusca known from Juan Fernandez there are a 

 few species which have not been refound by the Swedish expedition, viz. Stepha- 

 noda arctispira and ceroides of Pfeiffer, and S. selkirki of E. A. SMITH 

 (cf. Tryon, Man. of Conch. 3, 1887), as well as Fernandezia expansa, philippiana, 

 ivilsoni, inornata and longa of PiLSBRY, and F. conifera of Reeve. Further 

 two species, Stephanoda pusio and Fernandezia diaphana, both of King (Zool. 

 Journ. V, 1830—31), are insufficiently described and still unfigured, so that 

 they could not be identified. On the other hand, however, the expedition has 

 revealed 12 new species and contributed to an exact knowledge of the relation 

 of the land mollusc fauna. The collections contain 32 species, mentioned and 

 described in the following pages. 



