DALL: MOLLUSCA AND BRACHIOPODA. 329 
This is the second species of this very interesting genus, and the first from the 
Pacific. It is larger, more elevated, and much more solid than the form from the 
North Atlantic on which Dr. P. P. Carpenter erected the genus. 
The operculum of this specics has about three whorls and is thin, brown, and 
wholly horny, the external surface extremely concave, so that the appendage has 
the form of a shallow bowl. The animal agrees in general appearance with that 
of O. elegans, var. tenera Verrill, as described by Verrill from deep water off the 
North Atlantic coast. 
Capulidae. 
CAPULUS Montrort. 
Capulus (pars) Montfort, Conch. Syst., 1810, 2, p. 55; Cuvier, Regne Anim., 
1817, 2, p. 447; Patella ungarica (Linné). 
Galerite (Brongniard) in Roissy, Hist. Nat. Moll., 1805, 5, p. 211. 
Galerita (Brongniard) in Fischer, Tabl. Syst. Zoogn., 1808, p. 25; Ist. ap. G. 
ungarica Linné. Not Galerita Fabricius, Coleoptera, 1801. 
Amalthea B. Schumacher, Essai, 1817, p. 181; Patella ungarica (Linné). Not 
Amaltheus Montfort, 1810. 
Cabochon Lamarck, Extr. d'un Cours, 1812, p. 114. 
Pileopsis (pars) Lamarck, Anim. s. Vert., 1822, 6, p. 16. 
Actita Fischer de Waldheim, Adversaria Zool., 1825, 3. 
The first person to segregate this group was Bolten, who listed them as 
Patellae uncinatae in 1798, and the first to apply a generic name to them was 
Brongniard, whose name was published by Fischer, but unfortunately it had 
Previously been used for a beetle. Montfort, in 1810, based his genus Capulus 
on a combination of Patella ungarica Linné, and P. subrufa (Lister, Conch., 
pl. 544, fig, 32), the latter being an Hipponix. Montfort’s figure seems certainly 
to represent an Hipponix. But as Linné himself had made the same combina- 
tion and the name of Patella ungarica had become fixed upon the European 
shell, by common consent the latter is regarded as the type of Capulus. 
Later writers combined Capulus with Hipponix Defrance, under the (pre-occu- 
Pied?) name of Amalthea, and Lamarck under that of Pileopsis. It is truly 
Temarkable how long it took the heterogeneous assembly of Liunean Patella 
to get subdivided into its natural groups. 
Capulus chilensis DALI, n. sp. 
Shell large, rather thin, yellowish-white, covered with a straw-colored branny 
Periostracum, and comprising somewhat less than three whorls; nucleus subglobu- 
lar, glassy, swollen, smooth ; spire dextral, the shell, except a small part of the 
apex, symmetrically coiled; aperture subcircular; spire closely coiled, part of the 
arch extending behind the middle of the aperture, especially in young shells; 
