6 
VERMILIA. 
GENERIC CHARACTER: Tube testaceous, tapering, 
irregularly twisted, fixed to some other body ; margin of 
the aperture toothed. 
*V. TRIQUETRA. Sorpula Contortuplicata. 'I'urt. Liu. 
Pen. Brit. Zo., vol. 4, pi. 91. fig. misplaced, 157. Stew. 
Eleui., vol. 2, p. 422. S. T. Mout. Test, Brit., vol. 2, 
p. 511. Pennant’s figures, in addition to the error of the 
references, are from imperfect specimens. Common. 
The principal authority for the specific distinctions of the 
British species of this family, is Montagu, who has closely 
studied them. It seems proper to remark, however, that 
the direction in which the spire may turn, to the right or left, 
may not prove so unchangeable a mark as to warrant its 
forming a specific distinction. 
CLASS II. 
CIRRHIPEDA . 
The shell with many valves, sessile or on a stalk; the 
valves or plates unequal, covered inwardly by the mantle. 
The animal is soft, without head or eyes, testaceous, fixed. 
Body not articulated, having a mantle, with cirrous, many 
jointed, tentacular arms. Number of the arms various, 
unequal, in two rows, each composed of two setaceous, 
jointed, fringed cirri, supported on a common footstalk. I 1 
is the class Cirrhopoda of Cuvier, and genus Lepas of 
Linneus. 
SESSILE CIRRHIPEDA. 
The shell seated on some solid body, irregularly conical, 
with imperfect divisions, truncated at the top, where is the 
opening, closed with four interior valves. 
TUBICINELLA. 
GENERIC CHARACTER-. Tube cylindrical, with si* 
elongated valves jointed together side by side, striated 
longitudinally, surrounded by concentric rings ; open at 
the summit, and closed with a membrane at the base- 
Operculum with four obtuse valves. 
* T. Clavata. Balanus C. Pen. Brit. Zo., vol. 4, pi. 5', 
A. 5. Mont. Test. Brit., vol. 1, p. 10. On rocks 
Mount’s Bay. 
BALANUS. 
GENERIC CHARACTER: Shell sessile, fixed, conical, 
the top truncated, orifice irregular ; the base formed by a 
