148 AMPHIDROMUS, GROUP IV. 



von Java, p. 28, 108, pi. 20, f. 5 (1849) PFR., Zeitschr. f. Malak. 

 1849, p. 129. HOMBRON & JACQUINOT, Voy. Pol Sud, pi. 8, f. 9 



(Borneo) DESK, in Fer., Hist., ii, pt. 2, p. 20, pi. 148, f. 1-8 



MARTENS, Ostas. Landschn., p. 349, with var. obesus and tener, p. 

 350; Malak. Bl., xx, 1872-3, p. 173 (Celebes); Novit. Conch., p. 

 127, pi. 128, f. 11, 12 (young shell, from Maros, S. Celebes). 

 Amphidromus perversus (L.) MARTENS, Zool. Ergebnisse einer 

 Reise in Niederlandisch Ostindien, ii, p. 239 (Celebes); 1891. 



E. A. SMITH, Proc. Malac. >Soc. Lond., ii, p. 98 (Celebes) 



MLLPFF, Nachbl. d. D. Malak. Ges., 1896, p. 145 (Celebes). P. 

 and F. SARASIN, Die Land-mollusken von Celebes, p. 209 (1899). 

 A. perversus niveus P. & F. SARASIN, t. c., p. 209, pi. 26, f. 262. 

 Amphidromus perversus var. (citric allosus) SMITH, P. Z. S., 1895, 

 p. 115, pi. 3, f. 19 (Borneo). A. perversus var. atricallosus Ghl., 

 SCHEPMAN, Moll. Dutch Borneo Exped., in Notes from the Leyden 

 Museum, xvii, p. 156, June 9, 1896 (Borneo). 



Helix aurea DILLWYN, Descript. Catal. ii, p. 936 (1817). FER., 

 Prodr., p. 55 (?) Bulimus aureus SAVAINSON (de novo), Zool. 

 Illustr. i, pi. 47, upper and lower figures (1820-21). Orthostylus 

 aureus BECK, Index Moll., p. 50 Bulimus perversus aurea 

 MARTENS, Ostas. Zool., Landschn., p. 349, pi. 20, f. 13. Amphi- 

 dromus perversus (L.) var. aurea v. Mts., BOETTGER, Bericht 

 Senckenb. naturforsch. Gesellsch. in Frankfurt a. M., 1890, p. 146; 

 1891, p. 244 (Java). 



Distinguished from A. interruptus chiefly by its fuller, more ovate 

 contour, although it is less obese than most sultanus. The south 

 Celebes and Javan form may be considered typical (pi. 51, figs. 48, 

 49, 50) Bornean examples diverging somewhat. 



The var. obesus of von Martens is referable to typical perversus. 

 Var. aurea von Martens, which he identifies with aurea of Ferussac 

 and Swainson, is not the earlier aurea of Martyn, and the name will 

 have to be dropped. It pertains to orange-colored specimens which 

 have occurred in Celebes at Tempe, and in Java at Gunung Gedeh. 

 It seems to be an ill-defined form, probably not requiring a special 

 name, as Boettger found it running into yellowish-white at Gunung 

 Gedeh. 



CELEBES. The first reliable report of perrersus from southern 

 Celebes was by Prof, von Martens in 1873. Dr. A. B. Meyer col- 

 lected 25 specimens near Batu-besi cave, near Maros, which are de- 



