560 MOLLUSCA. 
3. Melampus olivaceus. 
Melampus olivaceus, Carpenter, Catal. Mazatlan Shells, p. 178 (1857) *; Report Moll. W. Coast of 
N. Am. pp. 223, 284°; Moll. of W. N. America, pp. 107, 151, 159°; Binney, Terr. Moll. 
U.S. iv. p. 26, t. 79. fig. 8*; Land and Freshwater Shells of N. Am. ii. p. 9, fig. 10°; 
Tryon, Am. Journ. Conch. iv. p. 7, t. 18. fig. 4°; Pfeiffer, Monogr. Pneumonopom. Suppl. 
iii. p. 3107; Fisch. & Crosse, Miss. Scient. Mex., Moll. li. p. 24, t. 34. figg. 9, 9a°. 
Hab. N.W. Mexico: Mazatlan (Reigen1?°*). 
Occurs also in California: San Francisco (Binney §), San Diego (Hemphill? ®, Green ®, 
Blake ®), Cape San Lucas (Xantus), Cerres I. (Ayres & Veitch). 
Binney’s 4 and Tryon’s © figures show three dark spiral bands, whereas Carpenter, who 
had before him many hundreds of specimens, speaks only of irregular purplish-brown 
tessellated patches. 
4. Melampus bocoronicus. (Tab. XLIII. fig. 11.) 
Melampus bocoronicus, Mérch, in Malak. Blatt. vi. p. 118 (1859)*; Pfeiffer, Monogr. Pneumo- 
nopom., Suppl. i. p. 513°. 
Hab. W. Costa Rica: Los Bocorones, near Punta Arenas, beneath stones, near the 
, beach (@rsted 12); Punta Arenas (Biolley). 
Two specimens collected by P. Biolley, one here figured, both somewhat larger than 
Dr. Morch’s type, show that there are really four parietal folds besides the columellar 
one, the three upper ones small and approximate, the lowest of larger size, distant from 
the others, and also elongated horizontally, not tuberculiform. MM. bocoronicus, there- 
fore, differs in this respect from UM. tabogensis, C. B. Ad., which it resembles in general 
form and colour. Biolley’s specimens are rather rough, perhaps by erosion of the 
dead shells. 
5. Melampus tabogensis. (Tab. XLIII. fig. 8.) 
Auricula tabogensis, C. B. Adams, Ann. Lyc. Nat. Hist. N. York, v. p. 435 (1852) +; Reeve, Conch. 
Icon. xx., Auricula, t. 6. fig. 47°. 
Melampus tabogensis, H. & A. Adams, Gen. Recent Moll. ii. p. 244°; Pfeiffer, Monogr. Auric. p. 32+. 
Hab. S. Panama: Taboga I. and Panama, on and under stones and rocks, at high- 
water mark (C. B. Adams '~*). 
6. Melampus strigosus, sp.n. (Tab. XLIII. fig. 9.) 
Testa obese ovata, imperforata, levis, pallide olivacea, strigis fuscis irregularibus picta ; spira convexe conica, 
sat brevis, apice suberosa, nigricans ; anfr. 7, ultimus sat convexus, basi paullatim attenuatus; apertura 
verticalis, angusta, } longitudinis equans ; plica parietalis unica, sat infera, parva, horizontalis, remota; 
plica columellaris horizontalis, compressa, valida; margo externus rectus, simplex, non sinuatus, intus 
liris intrantibus albis tenuibus 3—4 munitus. 
Long. 74, diam. 5; apert. long. 54, diam. 14 millim. 
Hab. W. Costa Rica: in a small tributary of the Rio Boto, Golfo Dulce, on dead leaves 
(Pittier, March 1896). 
