﻿sor.T^NAiA 457 



Group of Solenaia emarg'mata. 



Anterior region much narrowed, drawn out in the direction 

 of the anterior base, marked off from the rest of the shell by 

 a faint ridge. 



vSoi.KNAIA EMARGINATA (Lea). 



Shell greatly elongated, inequilateral, thin, gaping behind, 

 somewhat compressed, narrow in front, the anterior end being 

 drawn downward and forward into a rounded lobe; from this 

 point the shell gradually and regularly becomes wider to the 

 extreme posterior end; there is an anterior ridge separating 

 the front lobe from the rest of the shell ; posterior ridge sub- 

 angular, ending behind at the base of the shell, posterior end 

 subtruncate; beaks low and compressed,but sharp, with doubly- 

 looped, subnodulous sculpture; surface having decided con- 

 centric sculpture throughout, with a radial sulcus on the pos- 

 terior slope; epidermis pale, ashy-green; nacre bluish-white,, 

 semitransparent and showing the outside sculpture ; hinge with 

 vestigial laterals and pseudocardinals. 



Length 125, height 34, diam. 16 mm. 



Siam. 

 Mycetopus emarginatus Lea, Pr. Ac. N. Sci. Phila., IV, i860, 



p. 308; Jl. Ac.^N. Sci. Phila., V, 1863, p. 398, pl- l. fig- 305 ; 



Obs., X, 1863, p. 34, pl- I., fig- 305-— SowERBY, Conch. Icon., 



XVI, 1868, pl. II, fig. 6.— FiscHFji, Jl. de Conch., XXXVIII,. 



1890, p. II. 

 Platiris (Mycetopus) emarginatus Lea, Syn., 1870, p. 90. 

 Anodonta emarginatus C1.ESSIN, Conch. Cab. Ano., 1875. p. 



169, pl. LV, figs. 5, 6. 

 Mycetopus (Solenaia) emarginatus Fischer. Bull. See. d'Au- 



tun, IV, 1891, p. 135. 

 Solenaia emarginata Conrad. Am. Jl. Conch., l\ . 1869. p. 249. 



■ — Simpson, Syn.. 1900, p. 655. 



The type, the only shell T have seen, is badly broken and 

 apparently somewhat warped. It probably gapes at the pos- 



