CONCHLFEBA. 459 



Kellia, Turton, 1822. 



Etymology, named after Mr. 'Kelly, of Dublin. 



Synonyms^ Lasea (Leach), Br. 1827. Cycladina (Adansonii) 

 Cantr. Bornia (sub-orbicularis) Phil. Poronia (rubra), Eecluz 

 (not Willd). Erycina (cycladiformis), Desh. (not Lam.) 



Types, K. sub -orbicularis, Mont. K. rubra. PI. XIX 

 Fig. 12. 



Shell small, thin, sub-orbicular, closed ; beaks small ; margins 

 smooth ; ligament internal, interrupting the margin (in K, 

 subo7'hicuIcms), or on the thickened margins (in K. 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. suhorhicularis) 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- 

 i^elves by a byssiis at pleasure. K. 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. Zaj9e?^o?/sM (Chironia), Desh. PI. XIX., 

 Fig. 11, was obtained, burrowing in sandstorl'e, f:om deep 

 water, at Monterey, California. 



Distribution, 20 species. Norway — New Zealand — California. 



Fossil, 20 species. Eocene — . 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 Eecl.) 

 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, Eocene — , France, Java. 



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