THE NAUTILUS. 
5 
The Dialeucas are very variable and puzzling and none of the 
specimens collected exactly agree with any figures or descriptions 
known to the writer. 
72. Helix (Dialeuca) conspersula v. platystyla Pfr. Sav. la 
Mar (on trees). 
73. Helix (Dialeuca) conspersula v. virginea C. B. A. Mt. 
Pleasant (on trees). 
74. Helix (Dialeuca) subconica C. B. A. Mandeville : Stony 
Hill. 
75. Helix (Dialeuca) fuscocincta C. B. A. Bought. 
76. Helix (Dialeuca) nemoraloides. C. B A. (?) Bog Walk. 
77. Helix (Dialeuca) blandiana C. B. A. Buff Bay ; Pt. An¬ 
tonio. 
78. Helix (Dialeuca) gossei Pfr. Hope River. (Pilsbry and 
others unite this with H. subconica C. B. A. There is a shell of the 
above and specimens of Adam’s species in the Natl. Museum which 
were labelled and sent by Adams to Dr. Lea. H. conica is a thin 
shell, much more depressed and with straighter spire than this spe¬ 
cies; the last whorl is scarcely descending anteriorly, while in this 
species it is abrupt and strongly deflected. In H. gossei the outer 
lip is thickened and reflected, the columella is quite strong and 
broad. If it were found in Cuba it would be called a Coryda, and 
is suggestive of an elevated Helix alauda). 
( To be concluded in June number .) 
ON SOME SPECIES OF MTJLINIA FROM THE PACIFIC COAST. 
BY W. H. DALL. 
Mulinia modesta, n. s. (Plate I, lower fig.). 
Shell rather small, ovate-triangular, thick, equilateral, covered 
with a lineated straw colored thin epidermis, ivory white with a few 
rusty flecks toward the umbones; surface smooth except for incre¬ 
mental lines; anterior dorsal area obscure, posterior larger, bor¬ 
dered by a hardly angulated ridge on which the epidermis forms a 
raised line, but without any marginal flexure behind the basal ter¬ 
mination of this ridge; anterior end evenly rounded, beaks promi¬ 
nent, pointed rather distant, pallial sinus well marked. Lon. 42.0 
alt. 31.0, diam. 24.0 mm. 
Habitat, Guaymas, Sloat, in U. S. Nat. Mus. 
