218 Records of the Indian Museum. [VOreVEiE 
1883. Theodoxis michont, Locard, Arch. Mus. Hist. Nat. Lyon, U1, pp. 
1894. Neen. (Theodoxia) michoni, Dautzenberg, Rev. Biol. Nord. 
France, V1, pp. 351, 352. 
1913. Theodoxis michont, Preston, op. cit , p. 471. 
There has been a great deal of confusion in literature as to 
the exact status of this form. Von Martens, who gives complete 
references to previous literature, was the first to recognize its 
relationship with N. macrit, Recluz, but in later works Locard, 
Dautzenberg and Preston have treated the species as distinct, and 
as belonging to the subgenus or genus Theodoxis. ‘This view, as I 
have pointed out above, is not correct and the species should be 
assigned to the genus Neritina and the subgenus Neritaea. Kobelt ! 
in his account of N. macriz says, ‘‘Martens hat’ Neritina karasuna 
und michonw mit macrii vereinigt, und zwar mit Recht,’’ and 
therefore includes michoni only as a synonym of N. macrit. 
However, owing to the differences between the typical N. macrii 
and the form michoni I consider the latter as a distinct variety of 
the species. 
The shells of this variety are less ovate than the typical 
form, have the spire a little more pronounced, the suture more 
impressed, the outer lip of the aperture extending much further 
over the columellar region, a relatively broader and more flat 
columellar region and the mouth shorter but broader. 
In the Mesopotamian collections there are five specimens of 
this form, four collected by Dr. Bowell at Basra and the fifth 
from the Khandag creek, collected by Dr. Boulenger. 
It may also be pointed out here that some of the specimens, 
collected by Dr. Annandale from the exit of the R. Jordan, Palestine, 
were described by Preston as being of an intermediate character 
between N. michom and N. jordani. I have examined these 
specimens but can find no resemblances between them and UN. 
jordant except for their colouration. ‘This point is considered 
further under N. jordani. 
Neritina jordani, Sowerby. 
1861. Nevitina jordani, and var. turris, Mousson, Vierteljahrsschr. 
Naturf, Ges. Zurich V1, pp. 151-152. 
1879. Neritina jordani, von Martens, op. cit., pp. 84-86, pl. 11, figs. 
14-10. 
1883. Theodoxia jordani, Locard, op, cit., pp. 231, 232. 
1894. Neritina (Theodoxia) jordani, with var. aberrans, Dautzenberg, 
op. cit., PP. 349, 350. 
1899. Neritina jordant, var. turris, Kobelt, op. cit., pp. 2, 3, pl. ccxi, 
figs. 1319, 1320. 
1913. Lheodoxis gordani, Preston, op. cit., p- 470. 
1918. Neritina gordani, Annandale, Rec. Ind. Mus. XV, ps. 162. 
Dr. Annandale recorded the occurrence of this species in 
Mesopotamia from specimens sent to him from Nasariyeh. Since 
then we have received several shells from Basra collected by Dr. 
Bowell. This large series, together with the Palestine shells 
! Rossmassler's Fon penne wu, Stssw. Moll. (n. f.) VIII, p. 5. 
