1 98 FAUNA AND FLORA OF PALESTINE. 



large, almost approaching the specimens of Engedi in size, but black, 

 more inflated and obtuse, and with a rich deep purple colour inside the 

 mouth. Those from the Kishon are similar, but smaller. 



1 68. Rlclanopsis aviuionis. Tristram. P. Z. S., 1865, p. 542. 

 Long. 25, diam. 10; apert. long. 7, larg. 5 mill. 



I was at first inclined to place this shell as a variety of RI. prcrrosa ; 

 but its more elegant and elongated shape, the smallness of its mouth, and 

 the traces of longitudinal ridges, appear to me sufficient to justify its 

 separation. Found only in streams at Heshbon and Ammon, east of 

 Jordan, where the other species does not occur. 



169. Melanopsis smilcyi. Bourg. Voy. Ivler Morte, p. 66. 

 In a few restricted localities ; chiefly at Ain Sultan, Jericho. 



170. Melanopsis fcrriisaci. Roth. Moll. Spec, 1839, p. 24, pi. ii., 

 f. 10. 



A species of Asia Minor and Northern Syria, but also found here and 

 there in Lebanon. 



171. Melanopsis dories. Issel. Moll. Persise, 1865, p. 16, pi. i., 

 f. 7, 8. 



Found in running water near Beyrout. Originally described from 

 Persia. 



172. Melanopsis variabilis. V. de Busch. in Phil. Abbild., 1847, 

 p. 175, pi. iv., ff. 7, 8, 10. 



Also found in streams near Beyrout. 



173. Melanopsis brevis. Parr, in Mouss. Coq. Bellardi, 1854, p. 51. 

 In the Litany River. 



174. Melanopsis costellata. Fer. Monog. Melanop., p. 28. 



In the Kishon. The differences between this and RI. saiilcyi are 

 clearly pointed out by Bourguinat. This species is less fusiform, more 

 inflated, does not increase regularly, and its last whorl is three times the 

 size of the others united ; while that of . Msaulcyi is not more than once 

 and a half as larcre. 



