956 MOLLUSOA. 
Icon. xix., Physa, t. 2. fig. 11 (1873) *; Clessin, in Martini & Chemnitz, Syst. Conch.-Cab. 
ed. 2, Limneiden, p. 329, t. 46. fig. 5 (copied from Sowerby) ’. 
Physa nitens, var., Strebel, Beitr. Mex. Land- und Siissw.-Conch. i. p. 48, t. 6. figg. 24a, 5°. 
The most beautiful and the largest species of this genus, characterized by the whitish rays on all the whorls, 
except the first, by a rather elongate pointed spire, and by the largest diameter being in the lower third 
of the last whorl, giving to the whole more the shape of a bag (saccata) than of an egg (ovata). The 
eround-colour is a dark greyish-brown, becoming darker on the upper whorls ; at the suture is a yellowish 
band ; interior of the aperture dark purple-brown. 
a. Long. 40, diam. 19; apert. long. 274, lat. 1] millim. 
b. 9 393, 99 18 3 2? 28, bP) 10 39 
C. 39 35, 39 16; 99 26, 99 10 99 
d. 4 33, 4, 16; 09 25, 5 9 5 
é. 99 34, 39 16 : 99 26, 99 9 99 
f._-«812 (15 lines). 
a. From a specimen in Piitel’s collection, now in the Berlin Museum; 6. Bottger’s specimen from Peten ; 
c. From the figure given by Sowerby *; d. According to Strebel®; ¢. Second specimen in the Berlin Museum ; 
f. According to Woodward *. 
Hab. S.E. Mexico: coast of Tabasco, in swamps (Dr. Berendt®); Mexico, without 
nearer indication of locality (Beck '). | 
N. GuaremaLa: in the river Peten, Dept. of Peten, and in a pond at Coban (Stol/, 
now in Béttger’s collection). 
Woodward ® calls it a Californian, Carpenter? a Caribbean species; Sowerby * gives 
Jamaica as locality. 
I have in vain searched in Gray’s various writings for a description or figure of this 
species. ‘The figure given by Binney (Land and Freshw. Shells of N. Am. ii. p. 98, 
fig. 167) does not agree with my specimens in the proportion of the spire; it seems to 
have been taken from an individual variation of P. aurantia. 
Sowerby 4 and Clessin® incorrectly attribute the name of the species to Quoy (Voy. 
‘Astrolabe’). It was given in honour of Miss Mauger, as in Helicina maugerie (Zool. 
Journ. 1. p. 251). | 
Var. acutalis, 
Aplecta nitens, var. 8. acutalis, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, ii. p. 88, t. 39. 
figg. 2, 2a’. 
Of the general outline and dark grey-brown colour of P. maugere, but wanting the white rays. Spire 
relatively a little longer. 
Hab. i. Mexico: Cazones, State of Vera Cruz, on the coast, north of the city of Vera 
Cruz, near Papantla (Sallé"). 
z. Physa aurantia. 
Physa peruviana (Gray), Menke, in Zeitschr. f. Malak. 1850, p. 163°. 
Aplexa aurantia, P. Carpenter, Catalogue of Mazatlan Shells in Brit. Mus. p. 179 (1857) *. 
Bulinus aurantius, Binney, Land and Freshw. Shells of N. Am. ii. p. 97, figg. 166, 167 (description 
copied from Carpenter) *. 
