366 MOLLUSCA. 
10. Physa nicaraguana. (Tab. XX. figg. 4, 4a.) 
Physa nicaraguana, Morelet, Test. Noviss. ii. p. 16 (1851) *. 
Ovate, with rather short spire; pale brown, with thickly-set whitish vertical wrinkles and sometimes some 
whitish spiral lines at the base; apex dark reddish. Aperture 4 of the whole length; columellar margin 
receding, rather thin, white. 
Long. 17 (probably in error for 27), diam. 12 millim. (Morelet). 
Long. 26, diam. 13; apert. long. 20, lat. 7 millim. (from a drawing made by Mr. E. Smith). 
Hab. Vake of Nicaracua (Morelet *). 
Iam indebted to Mr. Edgar Smith for a drawing of this species, which is not 
mentioned by either Reeve or Clessin. In the shortness of the spire P. nicaraguana 
somewhat resembles P. obtusa, Clessin, but differs from that species in general form 
and apparently in the less shining surface. 
Morelet 1, it may be noted, uses the word “‘nitida” in his descriptions of the other 
species of Physa, but omits it in his definition of P. nicaraguana. 
11. Physa spiculata. 
Physa spiculata, Morelet, Test. Noviss. i. p. 18 (1849) *; Sowerby, in Reeve’s Conch. Icon. xix. 
Physa, t. 6. fig. 46”. 
Aplecta spiculata, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, ii. p. 93, t. 27. fig. 13, t. 30. 
fig. 15°. . | 
Aplexa nitens, var. spiculata, Pilsbry, Proc. Acad. Phil. 1891, p. 325 *. 
Physa, sp., Strebel, Beitr. Mex. Land- und Siissw.-Conch. i. p. 56, t. 6. fig. 30°. 
The most turrite of the smaller Central-American Physa, clear yellowish, translucent ; columellar margin 
nearly straight, white, attenuated towards the base; a very distinct small white band at the suture. 
a. Long. 18, diam. 8; apert. long. ?, lat.? millim. 
b 99 17, 39 8; 2° U1, 99 8 29 
C. 39 17, 39 83 2 29 12, 29 5 99 
d 329 18, 29 53 a 29 9, 39 4 99 
é ” 93, ” 43; 9 53, ” 23 ” 
a. Measurements given by Morelet; 6 and c. by Fischer and Crosse; d. Specimen from Tabi; ¢. Measure- 
ment given by Strebel. 
Hab. ¥. Mexico: one calcified specimen found in the sand on the beach at Vera Cruz 
(Strebel ®); Lagoon of Vera Cruz (Sallé *). 
Yucatan: Campeche, in cisterns in the city (Morelet 17); Tabi (Godman); Merida 
(Heilprin *). 
CENTRAL GuaTEMALA: Plateau of Guatemala (Bocourt ). 
W. Guatemata: Lake of Duefias (Salvin). 
Fischer and Crosse * distinguish a variety with broader shell (measurements ¢); but 
the figure which they give for it (t. 30. fig. 15) is rather more fusiform and agrees very 
well with typical specimens from Morelet’s collection, whereas their other figure (t. 27. 
fig. 13) is somewhat more conical. 
Obs.—Physa peruviensis, Megerle v. Mihlfeldt [in Anton’s Verz. der Conch. p. 48 
