STKES : ON DESPCENA CINNAMOMEA, N.SP. 137 



absence of lauiellfe, or teeth, within the outer wall of the aperture. 

 The type-specimen of the new species is in the British Museum. 



Since Pfeiffer gave an account of the Proserpinacea ' several authors 

 have added to our knowledge of the group, so that a brief summary of 

 their work may not be out of place here. 



The genus Proserpina was renamed by Mr. Newton 2 on the ground 

 that there is already a Proserpinus of Hiibner, earlier in date. The 

 species of Despcena listed by Pfeiffer are nitida, Gray; linguifera, Jonas; 

 pisum, Adams; ylobuhsa, Orb.; depressa, Orb.; bidentata, Adams; 

 and Swifti, Bland. In addition to the species now described we 

 have to chronicle D>. Cousini, Jonsseaume, 3 from Ecuador; that author 

 described the form as a Proserpinella, but it appears to really belong 

 here. It may be noted that Higgins gave 4 the additional locality 

 of Ecuador for D. Swifti, but probably this was due to an error of 

 identification. 



Specimens of the rare Cyane Blandiana, collected by Professor Steere 

 in Peru, are in the British Museum ; and a second species of the genus, 

 C. Orbignyi, has been described by Mons. Ancey 5 from Bolivia. 



A third species of Ceres, C. Nelsoni, from Mexico, has been added by 

 Dr. Dall 6 to that interesting genus. 



A note on two genera, Calybium and Heudeia, which appear to 

 link the Despcena group with the Helicinidse, may be of inter< st. 

 There appears to be only one species of each genus known, and the 

 references are as follows : — 



Heudeia Setchuanensis (Heude). 



Helicina Setchuanensis, Heude : Note Moll. terr. Fleuve Bleu, 1885, 



p. 98, pi. xxiv, fig. 16. 

 Heudei Setchuanensis, Heude : Crosse, Journ. de Conch., torn, xxxiii 



(1885), p. 44; Mdllendorff, Jahresb. Deutsch. Malak. 



Ges., Bd. xiii (1886), p. 101 ; Crosse, Journ. de Conch., 



torn, xl (1892), p. 287, pi. iv, figs. 3-3d. 



Hab. — Tchen-Keou (Heude). 



Caltbitjm Massiet, Morlet. 

 Calybium Massiei, Morlet: Journ. de Conch., torn, xxxix (1891), 

 p. 316; op. cit., torn, xl (1892), p. 327, pi. viii, figs. 

 2-2d; Crosse, t.c, p. 286. 



Hob. — Laos (Morlet). 



Both these interesting forms are operculated, and so show relationship 

 with the Helicinidse, whilst the presence of lamellae on the parietal 



1 Mon. Pneum., Suppl. iii, pp. 295-298. 



2 Cat. Edws. Coll. Brit. Oligocene and Eocene Moll, in Brit. Mus., 1891, p. 255. 



3 Bull. Soc. Zool. France, torn, xii, p. 181, pi. iii. figs. 15, 16. 



4 Proc. Zool. Soc, 1872, p. 687. 



5 Naturaliste, 1892, p 178. 



6 Nautilus, xii (July, 1896), p. 27. 



