32 LIEUT.-COL. H. H. GODWIN-AUSTEN ON [Jan. 6, 



p. 265 ; id. Preuss. Exped. Ost-Asien, Landschneck. p. 221, t. xi. 

 figs. 2, 5, t. vi. figs. 3, 3 6 (1867). 



Nanina producta, Mousson, in collect. 



Ariophanta martini, Pfr., Sumatra ( = a7npkidroma, v. Mart.), 

 Semper, Raise im Arch. il. Philipp., LandmoU. p. 51, t. vii. fig. 4. 



Dijakia (?) striata. 



Nanina striata, Gray, P. Z. S. 1834, p. 59 ; v. Martens, Preuss. 

 E.\ped. Ost-Asien, Landschneck. p. 228 (1867). 



Helix orientalis, Reeve (non Gray), Conch. Icon. pi. Ixxviii. 

 fig. 409 (1852). 



Helix naninoides (Benson), Pfeiff. Monogr. Helic. v. p. 122 

 (1868). 



Helix striata, Pfeiff. Monogr. Helic. i. p. 55 (1848). 



Helix Isabella, Rousseau in Hombr. et Jacq. Voy. au Pole Sud, 

 Zool. V. p. 6, t. iv. figs. 7-10 (1854). 



Hemiplecta naninoides. Wall. P. Z. S. 1865, p. 406, 



Ariophanta striata. Semper, Reisenim Arch. d. Philipp., Landmoll. 

 p. 53, t. iii. figs. 21 ff, b, t. vii. fig. 5. 



Dj/akia (?) mindaiensis. 



Helix mindaiensis, Bock, P. Z. S. 1881, p. 633 (Amonta 

 District). 



Dyakia (?) sarawakana : Nanina (AriopJianta) sarawakana, 

 Dohm, Nachricht. deutsch. Malak. Gesellsch. 1881, p. 66 

 (Sarawak). 



Dyakia NASUTA. (Plate V. figs. 4-4 c.) 



Helix nasuta, Metcalfe, P. Z. S. 1851, p. 70; Pfeiff. Monogr. 

 Helic. iii. p. 203 (1853), et v. p. 306 (1868); Reeve, Couch. Icon, 

 pi. civii. fig. 1031 (1853). 



Ryssota 1 nasuta. Wall. P. Z. S. 1865, p. 407. 



Nanina {Hemiplecta) nasuta, v. Martens, Preuss. Exped. Ost- 

 Asien, Landschneck. p. 224 (1867). 



Hab. Niah Hills. 



One specimen of this very remarkable and beautiful shell was 

 preserved in spirit. Anitnal pale-coloured, like that of D. hugonis ; 

 the mucous gland has a very small overhanging lobe and a broad 

 pallial margin. The odontophore (Plate V. fig. 4 b) has the central 

 tooth tricuspid, the central cusp hardly rising above those on either 

 side ; the median are square at the end, bicuspid, the laterals 

 (fig. 4 c, 80th and 81st) have a sharp inner cusp and a rounded outer 

 cusp, rising close together ; the outermost laterals are unicuspid and 

 small : 



-h 70 . 14 . 1 . 14 . 70 + 

 -1-80 . 1 .80 +. 



Some of the small outermost teeth were lost in dissection. The 

 generative organs (6gs. 4 and 4 a) are similar to those of D. hugonis 

 and do not require any further description. 



