323 



Var. Testa crassiore ; parte superiore lateris postiei partem in- 

 feriorem superante. 



Oboval, rather thin, very slightly inequivalve, nearly inequilateral, 

 ventricose, somewhat pellucid, white, nearly smooth or with delicate 

 concentric wrinkles, which are chiefly apparent near the rounded 

 anterior extremity; ventral edge nearly straight (as to convexity), 

 but much twisted, owing to the concavity in front of the obtuse 

 but prominent umbonal slope in one of the valves ; dorsal edge 

 scarcely sloping, arcuated in front, straightish behind ; extremity 

 of the hinder side (which is slightly the shorter) very obtusely 

 biangidated; ligament rather sunken; beaks broad and directly 

 incurved ; teeth small. 



Var. Thicker and coarser ; a broader space from the umbonal 

 ridge to the posterior end, which latter projects at its upper ex- 

 tremity. 



Guinea. 



198. Tellina spectabilis (pi. Lxv. f. 254.) Hanley, Zool. 

 Proc. 1844.. 



T. testa, ovato-trapeziformi, subtenui, maxime infequilaterab, 

 ventricosa, impolita, extus intusque albida; concentrice striata, 

 striis elevatis, tenuibus, rugosis ; margine ventrali pauluhun con- 

 vexo ; dorsali antice convexo et declivi, postice recto aut subiu- 

 curvato et maxime declivi ; extremitate lateris antici longioris 

 obtusa; extremitate postica truncato-cuneiformi, obtuse biangu- 

 lata; flexura costaque umbonali conspicuis; ligamento maguo, 

 baud prominente ; dentibus minunis. 



Ovate, subtrapeziform, not sobd, extremely inequilateral, ven- 

 tricose, dull, white both internally and externally, with fine raised 

 concentric wrinkles, wliich are rather distant near the beaks, but 

 become closer towards the but little convex ventral margin ; ante- 

 rior side produced, its dorsal edge convex and sloping (in the 

 young it is at first almost parallel with the ventral) ; its extremity 

 obtuse or more rarely rounded ; posterior side extremely short, 

 its extremity truncato-cuneiform and obtusely biangulated, the 

 ligamental edge abruptly sloping and straight or slightly incurved ; 

 fold and flexure prominent, the former subcarinated in the young ; 

 ligament large but not projecting ; teeth minute. 



Bay of Manilla and Isle of Siquijor. 



199. Tellina Dombei (pi. lxii. f. 182, and pi. lxiv. f. 222.) 

 Hanley, Zool. Proc. 1844. 



T. testa obovata aut ovab, subinaequivalvi, rnagis minusve so- 



