454 MOLLUSCA. 
Var. gassiesi. 
‘Melania gassiesi, Reeve, Conch. Icon, xii., Melania, t. 35. fig. 236 (1860) °. 
The length of the aperture distinctly less than the diameter of the last whorl. Long. 38, diam. 18; apert, 
long. 15 millim. . . * 
Hab. CentRAL AMERICA ®, 
8. Pachychilus turatii. (Tab. XXVI. figg. 10-20.) 
Melania turati, Villa, in Strobel’s Giornale di Malacologia, ii. p. 113 (1854)*; Notizie interno il 
genere Melania, p. 8 (Diario dell’ Accademia Fisico-Medico e Statistico di Milano, 1855) *s 
Brot, Matériaux fam. Mélaniens, ii. p. 6, t. 3. figg. 11, 12 (1868) °; in Martini & Chemnitz, 
Syst. Conch.-Cab. ed. 2, Melaniaceen, p. 39, t. 5. figg. 2, 2a°. 
Pachychilus turatii, Fisch. & Crosse, Miss. Scient. Mex., Moll. ii. p. 355, t. 51. figg. 1, La’. 
Melania berendti, Dunker, in litt. (cit. Strebel, 1878) °. 
Melania gassiesi (Reeve}, Strebel, Beitr. Mex. Land- und Siissw.-Conch. i. p. 37, t. 4. figg. 35, 
35a, 5". 
Near P. liebmanni, but with the whorls a little more convex, the general form somewhat more conical, tapering 
upwards; the apex generally eroded, but nevertheless pointed, not broadly truncated, and white in 
colour. . 
Hab. FE. Mextco: Rio Atoyac *, State of Vera Cruz, on stones (Strebel, Hége) ; Rio 
Jamapa, State of Vera Cruz (Beadle *); near Orizaba (Botteri >; Berendt, in coll. 
Dunker °); Jalapa and Cordova (Hége). 
The brothers Villa received their specimens from Ernesto Turati, and give ! St. Louis 
in Luigiana (Italian name of Louisiana) as locality. I have under examination a number 
of examples found by Hoge in the River Atoyac, which greatly exceed the Size originally 
indicated by Villa and Brot, and also somewhat that of Strebel’s largest specimen, the 
largest of Hoge’s shells measuring long. 46, diam. 20; apert. long. 20, diam. 12 millim. 
The curious appearance of the eroded, pointed, white spire may be due to local influence, 
but a similar peculiarity is shown in Brot’s figure 11 (which is said to have been drawn 
from an ‘‘ authentic” specimen), as well as in the figures given by Strebel and Fischer 
and Crosse; it becomes therefore almost a specific character in comparison with the 
broadly decollated appearance of P. liebmanni and its var. gasséesi. 
From a large number of specimens collected by Hége in the Atoyac river the most 
dissimilar give the following measurements :— 
a. Long. 51, diam. 23; apert. long. 20 millim. Anfr. superst. 7. 
b. » 42, 4, 22; %” aL ” ” 5. 
C. » 40, 4, 16; ” 183 ” ” 9. 
d, 4, 45, 4, 173 3 ” 17 2 ” 9. 
é. 29 59, 99 19 5 39 20 99 99 9. 
* Dr. Seler informs me that the word “ Atoyac” signifies, in the native language, “on the river,” and 
that many localities bear this name: the best known is a station on the railway between Orizaba and Paso 
del Macho, below Cordova. This is the locality visited by H. H. Smith in 1888, and Strebel and Hoge appear 
also to have collected at the same place. 
