CONCHIFERA. 459 
KELLIA, Turton, 1822. 
Etymology, named after Mr. O’Kelly, of Dublin. 
Synonyms, Lasea (Leach), Br. 1827. Cycladina (Adansonii) 
Cantr. Bornia (sub-orbicularis) Phil. Poronia (rubra), Recluz 
(not Willd). Erycina (cycladiformis), Desh. (not Lam.) 
Types, K. sub-orbicularis, Mont. K. rubra. Pl. XIX 
Fig. 12. 
Shell small, thin, sub-orbicular, closed ; beaks small ; margins 
smooth; ligament internal, interrupting the margin (in K. 
suborbicularis), or on the thickened margins (in KK. rubra) ; 
cardinal teeth 1 or 2, laterals 1—1 in each valve. 
Animal with the mantle prolonged in front into a respiratory 
canal, either complete (in K. suborbicularis) or opening into the 
pedal slit (in K. rubra); foot strap-shaped, grooved; gills large, 
two-on each side, united posteriorly, the external pair narrower 
and prolonged dorsally ; palpi triangular; posterior siphonal 
orifice single, exhalent. 
The hinges of these little shells are subject to variations, 
which are not constantly associated with the modifications of 
the mantle-openings. They creep about freely, and fix them- 
selves by a byssus at pleasure. KK. rubra is found in crevices of 
rocks at high-water mark, and often in situations only reached 
by the spray, except at spring-tides; other species range as 
deep as 200 fathoms. K. Laperousii (Chironia), Desh. Pl. XIX., 
Fig. 11, was obtained, burrowing in sandstone, fiom deep 
water, at Monterey, California. 
Distribution, 20 species. Norway— New Zealand— California. 
Fossil, 20 species. Hocene—. United States, Europe. 
Sub-genera. Turtonia (minuta), Hanley. Shell oblong, in- 
equilateral, anterior side very short; ligament concealed 
between the valves; hinge-teeth 2.2. Animal with the 
mantle open in front; foot large, heeled; siphon single, 
slender, elongated, protruded from the long end of the shell. 
Distribution, Greenland, Norway, Britain. In pools and cre- 
vices of rocks between tide-marks, and in the roots of sea- 
weeds and corallines. Mr. Thompson obtained them from the 
stomachs of mullets taken on the north-east coast of Ireland. 
Pythina (Deshayesiana), Hinds. (Myllita, D’Orb, and Recl.) 
Shell trigonal, divaricately sculptured ; ligament internal; right 
valve with 2 lateral teeth, left with 1 cardinal and 2 laterals, 
Distribution, 8 species, New Ireland, Australia, Philippines, 
Fossil, 2 species, Hocene—, France, Jaya. 
x2 
