80 CAUCASIAN LAURLE. 



distinct brown band. Aperture narrower, reversed ear- 

 shaped, impressed below the sinulus and the umbilicus, being 

 thus compressed laterally. The denticle of the right margin 

 below the sinulus entering like a large lamella; the small 

 fold between the median palatal fold and the columellar 

 lamella nearer to the latter than the former; otherwise very 

 like the type of super struct a. Length 4, diam. in middle 2 

 mm. (Bttg.). 



Southeast and northern outliers of the Osehten-Fischt 

 group, in forest, abundant ; Mt. Guk, 3000 ft, ; forests of the 

 lower Kurdschips. 



Pupa (Charadrobia) superstructa Mouss., var. zonata 

 Boettger, Jahrb. D. m. Ges., x, 1883, p. 182, pi. 7, f. 2a-b.— 

 Lauria zonata and mut. albina Bttg., Bericht Senckenb. 

 naturf. Ges., 1889, p. 22. — Pupa zonata Bttg., Rosen, Nachrbl. 

 D. m. Ges., 1905, p. 57. 



First described as a variety of superstructa, Boettger in 

 1889 considered it specifically distinct, I think with good 

 reason. He was influenced by the smaller size, the nearly 

 constant reddish-brown spiral band, and especially by the pit- 

 like impression behind the outer lip close below the sinulus, 

 producing a strong inward bend of the lip itself; and also 

 the presence of a strong palatal fold running obliquely in- 

 ward, parallel to the augular lamella, and corresponding in 

 position to the external pit. This is quite unlike the palatal 

 fold of superstructa, which is nearer the lower-palatal fold, 

 and runs directly inward. Compare figure 4, superstructa, 

 and fig. 8, zonata. 



As in s^iperstructa, the thick peristome is cut into numer- 

 ous denticles, strongest in the basal lip. Figured from a 

 topotype out of the Boettger collection, 3.8 x 2 mm. Fig. 9 is 

 reproduced from Boettger. 



While the specimens from the Osehten-Fischt Group and 

 those from Mt. Guk measure about, alt. Z 1 /*, diam. in middle 

 2 mm., those from the Kurdschips lowlands reach the size of 

 33,4x2% mm. 



There is rarely found in the Osehten-Fischt Stock, besides, 

 a uniform greenish-white mut. albina, which moreover is dis- 



