36 LIEUT.-COL. H. H. GODWIN- AUSTEN ON [Jail. 6, 



No. 4. Dahat Island, 2 ; olivaceous brown. 



No. 5. Karemon Island, 11 ; these differ from all others in their 

 dark sienna-brown colour, and might be designated as consul var. 

 ru/a. 



No. 6. From Dr. Hungerford, marked Borneo ; 4 specimens, 

 exactly similar to No, 1, and identified by him as jucunda. 



No. 7. Marked Borneo, 4 ; small; maj. diam. 14 mm. ; named 

 var. nana. 



No. 8. Borneo ? (Boxall), 3 ; not so closely wound as any from 

 No. 1 to No. 8, but smaller than any of subconsul, and, I think, 

 only a dwarf variety of that form. 



The largest shell of the whole series was in the set No. 5, and 

 measured 25 mm. maj. diam., alt. axis ]4"25, of 7 whorls. 



Helix consul was the first to be described from this part of the 

 world, the exact locality being Sarawak ; and an examination of the 

 British Museum species led me to the conclusion that jucunda and 

 oglaiu are only based on the size, or at the best may be considered 

 local varieties of consul. JEJ. hyalina of von Martens appears to be 

 another variety ; but the type I have not seen, and it is most diffi- 

 cult to form any opinion from drawings when the differences are so 

 minute and when shades of colour are so subtle and yet so constant 

 in the groups from different areas. 



E. hyalina appears to be larger and flatter in the spire thsLajiicunda, 

 and the proportions of the before-mentioned varieties come out as 

 follows, as regards the maj. diam. : E. consul 22 mm., jucunda 

 ] 1"18, hyalina 21 "0, and aglaia lO'O. 



EVERETTIA CUTTERI. 



Macrochlamys cutteri, H. Adams, P. Z. S. 1870, p. 794, pi. xlviii. 

 fig- 21. 



This animal is jet-black throughout, with a pale band on the 

 upper part of the neck running to the base of the eye-tentacles. 

 There are no right or left shell-lobes ; the right and left neck-lobes 

 ample, the last not divided. Pallial margin as usual. Lingual 

 ribbon and jaw as in E. jucunda, as also the generative organs. 



Everettia bncki, Issel, Ann. Mus. Civ. Geneva, vi. p. 399. 

 Hab. Borneo {Carl Bock), 



Microcystis tersa. (Plate IV. fig. 1.) 



Naninu tersa, Issel, Ann. Mus. Civ. Genova, vi. p. 399, t. v. 

 figs. 1-4 (1874j. 



Shell globose, thin, transparent glassy, very narrowly perforate ; 

 sculpture, no spiral striation except near the apex and that most 

 minute ; colour pale sienna tint ; spire conical, sides flat ; apex blunt ; 

 cuture shallow, adpressed ; whorls 5, regularly increasing and rather 

 flat : aperture semi-ovate ; peristome subvertical, sharp, scarcely 

 reflected at the oblique columellar margin. 



