PATULA. 
127 
The anatomy of very few of the Mexican and Central-American species is known as 
yet; the others are only placed here by the general analogy of the shell. Some are 
very aberrant in a single character, ¢. g. by a very narrow umbilicus; but I refrain for 
the present from treating these aberrant forms as generically distinct, and place them as 
subdivisions of the cosmopolitan genus Patula, until better information is obtained. 
CoMPARATIVE TABLE OF THE SPECIES OF Paruza. 
Nomen, Forma. Unmbilicus. Sculptura. Coloratio. |Diam.| Alt. | Anfr. Patria. 
. ; mm. | mm. 
mazatlanica, depressa, spira latus, $ diametri. | conferte costulato- | fusco-grisea. | 34 1 4 ? California, N.W. 
Pfr. parum convexa, striata. Mexico. 
rotundata. 
hermanni, P/r.| discoidea, spira latissinus, 4 dia- | conferte costulata. | cornea, niti-| 2 1 4 | H. Mexico, 8. Guate- 
plana, rotundata.| metri. dula. wala, 
wilhelmi, Pfr. .| depresse turbinata, | latiusculus, }-3 | subtiliter insequali- | rufo-fusca, 3 2-23 | 4 E. Mexico, Centr. 
spira conoidea, diametri. ter striatula. nitidula. Guatemala, Centr. 
rotundata, Costa Rica. 
conspurcatella, | depressa, infra tu- | latus. membranaceo-stria- | cornea. 33 3-4 | ?E. Mexico, Yucatan, 
Morel. mida, rotundata. tula. N. Guatemala, 
Honduras. 
impura, Pfr.... ” mediocris. rugoso - costulata, | corneo-fusca.| 4-44 | 3-33 | 44-5 | E. & S.W. Mexico. 
lineis membra- 
naceis obliquis. 
paleosa, Stred. .| trochiformis, sub- ” subtiliter costulata, | rufo-fusca. 42 3k 5 Hi. Mexico. 
angulata. lineis membra- 
naceis obliquis. 
turbinella, ” angustus. irregulariter rugosa.| albido - vi- 5 4 5 N. Guatemala. 
_ Morel, rens, 
A. Spire fiat ; whorls rounded, 4-5. 
1. Patula mazatlanica. 
Helix mazatlanica, Pfr. in Malak. Blatt. ii. p. 43 (1856)*; Monogr. Helic. Vivent. iv. p. 89°; 
Carpenter, Suppl. Report Moll. W. Coast of N. Am. p. 573°; Bland, Ann. Lyc. N. York, 
viii. p. 164, fig.9*; Binney & Bland, Land and Fresh-water Shells N. Am. i. p. 82, fig. 144°; 
v. Mart. Conch. Mittheil. ii. p. 180, t. 33. figg. 10-12 °. 
Helix (Patula) mazatlanica (Pfr.), Fisch. & Crosse, Miss. Scient. Moll., Mollusca, i. p. 231’. 
Pseudohyalina mazatianica (Pfr.), Morse, Journ. Portland Soc. i. p. 16, t. 7. fig. 35 (1864) °; 
Tryon, Am. Journ. Conch. ii. p. 266, t. 19 (4). fig. 59 (1866)°; Cooper, Am. Journ. Conch. 
v. p. 201 (1870) ”. 
Patula mazatlanica (Pfr.), Strebel, Beitr. Mex. Land- und Siissw.-Conch. iv. p. 29". 
(PaTULa, sensu str.) 
Hab. Norta America: ?Lone Mountain, near San Francisco, in rotten oak-stumps 
(Cooper 3°). 
N.W. Mexico: Mazatlan (ZH. Klocke 1° 12), 
According to Binney [Terr. air-breath. Moll. N. Am. v. pp. 21, 168 (1878), and 
