332 MALACOZOA. GASTEROPODA. SCUTIBRaXCHIATA. 



ultimately bifurcate. It is said to occur in the Mediterra- 

 nean. 



Emargiuula curvirostris. Desliayes, Lamk. Syst. vii. 58(3. — 

 Emargiuula conica. Blaiuv. Malac. PL 48. f. 4. 



Family II. — Caltptr.eina. 



Animal conical, not spiral, or only in a slight degree; 

 head broad, depressed; tentaciila large, pointed; eyes 

 on small prominences at their onter base ; foot thin, 

 nearly circular ; branchial canity very large, opening 

 TTidely before, and containing filamentaiy branchiae. 

 Shell subcorneal, not symmetrical, sometimes ^vith the 

 apex spiral. Name from the genus Calyptrsea. 



Genus 1. Capulus. 



Animal coniciil, slightly spira] at the sunmiit ; >Tith 

 tlie head distinct, the mouth proboscidiform ; the tenta- 

 cula tbV.., subcylindrical; the eyes on small prominences 

 at tlieir base externally ; the foot large and thin ; the 

 brancliial cavity open anteriorly, and furnished with 

 numerous narrow and longitudinal laminae, adhering by 

 a single transverse line to its floor. 



Shell irregular, conical, with the apex more or less 

 incHned or spii-al, and placed beliind; the aperture 

 roundish, with the mai'gin simple, and continuous ; the 

 cavity deep, with a muscular impression in the form of 

 a horse-shoe. 



Name from the cap-like form of the shell. Montfort. 



1 . Capidus Hungdricus. FooFs-caj) Capidus. 



Shell conoidal, rather thin, longitudinally sulcato- 

 striate, concentrically rugose, and covered with a pilose 

 epidermis ; the apex recurved, involute, much nearer the 

 posterior end ; the aperture roundish-oval, thin-edged, 

 sinuous. Named from its resemblance to a Hungarian 

 cap. 



A small individual, five-twelfths of an inch in diameter, was 

 found in January, 1843, by one of my pupils, INIr. William 

 Robertson. It is slightly decayed, witli the epidermis abraded, 

 the colour dull white externallv, vellowisli-white Avithin. When 



