586 MOLLUSCA. 
Also very near the Atlantic L. lineata, with which I should have placed it, had it 
not been for the western habitat. It is more convenient, however, to treat the Atlantic 
L. lineata and the Pacific L. philippii as separate species, as they do not quite agree. 
L. parvula, Philippi [Zeitschr. f. Malak. 1848, p. 149], found by E. B. Philippi, 
brother of the well-known conchologist, at Panama, belongs perhaps to the same or to 
a nearly allied form, as it is described as having black waved streaks, a character not 
possessed by any other Pacific Littorina known to me. 
12. Littorina conspersa. 
Littorina conspersa, Philippi, Abbild. neuer Conch. u. p. 200, t. 4. fig. 14°; C. B. Adams, Ann. 
Lye. Nat. Hist. N. York, v. p. 896 (1852)?; Carpenter, Catal. Mazatlan Shells, p. 346° ; 
Morch, Malak. Blatt. vii. p. 69 (1860-61)*; Weinkauff, in Martini & Chemnitz, Syst. 
Conch.-Cab. ed. 2, Litorina, p. 64, t. 8. figg. 10, 11°. 
Littorina modesta, Menke, Malak. Blatt. 1850, p. 164 (nec Philippi, 1845) °. 
Littorina aspera, var. conspersa, Tryon, Manual of Conch. ix. p. 249, t. 44. fig. 82 (copied from 
Weinkauff) *. 
Conoid-oval, with flat spiral ridges, separated by narrow furrows; bluish-white, with numerous small black 
dots of unequal size. 
Hab. N.W. Mexico: Mazatlan (Melchers & Liebmann®, Reigen *). 
Satvapor; Libertad (Krause, 1881, in Mus. Berol.). 
W. Nicaracua: Realejos (Petit!, Hinds *). 
W. Costa Rica: Punta Arenas, on stones (Cirsted *). 
S. Panama: Panama, on large fragments of rock at high-water mark (C. B. 
Adams *). 
Var. puncticulata. . 
Littorina puncticulata, Philippi, Abbild. neuer Conch. 11. p. 201, t. 4. fig. 15°; C. B. Adams, 
Ann. Lyc. Nat. Hist. N. York, v. p. 400 (1852) °; Weinkauff, in Martini & Chemnitz, 
Syst. Conch.-Cab. ed. 2, Litorina, p. 63, t. 8. fig. 9 (copied from Philippi) *. 
Littorina conspersa, var. puncticulata (Phil.), Carpenter, Catal. Mazatlan Shells, p. 346"; Morch, 
Malak. Blatt. vii. p. 69 (1860-61) ». 
Littorina aspera (part.), Tryon, Manual of Conch. ix. p. 249, t. 44. fig. 83 (copied from 
Weinkauff) ». 
More globose, the aperture occupying distinctly more than half the whole length, in some specimens two-thirds 
of it, and with somewhat stronger spiral ridges. Probably only an individual variation. 
Hab. N.W. Mexico: Mazatlan (Rezgen 14). 
W. Nicaragua: Realejos (Petit §). | 
W. Costa Rica: Punta Arenas, with the typical form (Grsted 2), 
S. Panama: Taboga Island, on fragments of rock at high-water mark (C. B. 
Adams ?®). 
According to Philippi’s description and figure’, LZ. puncticulata differs from 
