dall: mollusca and brachiopoda. 329 



This is the second species of this very iuteresting 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 species 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 app(Tarance with that 

 of C elegans, var. teiiera Verrill, as described by Verrill from deep water off the 

 North Atlantic coast. 



Capulidae. 



CAPULUS MONTFORT. 



Capulus (pars) Montfort, Conch. Syst, 1810, 2, p. 55 ; Cuvier, Regne Anim., 



1817, 2, p. 447 ; Patella ungarica (Linne). 

 Galerite (Brongniard) in Roissy, Hist. Nat. Moll., 1805, 5, p. 211. 

 Galeiita (Brongniard) in Fischer, Tabl. Syst. Zoogn., 1808, p. 25 ; 1st. >jp. G. 



ungarica Linne. Not Galerita Fabric! us, Coleoptera, 1801. 

 Amalthea $. Schumacher, Essai, 1817, p. 181; Patella ungarica (Linue'). Not 



Ainallheiis 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., 1826, 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 ungarira Linne, and P. subrufa (Lister, Conch., 

 pi. 544, fig, 32), the latter being an Ilipponix. Montfort's figure seems certaiidy 

 to represent an Hipponix. But as Linne 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 Capuhis with Hipponix Dofrancc, under tlio (pro-occu- 

 pied?) name of Amalthea, and Lamarck under that of Pileopsis. It is truly 

 remarkable 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 tliin, 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 ; 



