SPATHA 1335 



''A very handsome species, of which the internal sculpture 

 is most curious and may, in a measure, be compared to the 

 markings of finger-prints : in the single specimen before me 

 this remarkable sculpture is much more apparent in the right 

 than in the left valve." 



Group of Spatha pctersi. 



Shell rather thin and small, greenish or olive; beak sculpture 

 consisting of faint, more or less oblique, parallel ridges ; hinge 

 line narrow ; teeth scarcely developed ; nacre bluish or green- 

 ish. Animal unknown. 



Spatha petkrsi von Martens. 



Shell oblong, thin, subcompressed, inequilateral ; beaks 

 slightly elevated, somewhat pointed ; posterior ridge full, 

 rounded or slightly inclined to be biangulate, ending in a 

 blunt point a little below the median line ; dorsal and basal 

 lines lightly curved., the latter full behind the middle ; anterior 

 end rounded ; posterior end obliquely subtruncate above ; sur- 

 face lightly, concentrically sculptured ; epidermis yellowish- 

 green, sometimes feebly rayed on the dorsal slope ; nacre blu- 

 ish-white to lurid purple; muscle scars but slightly impressed. 



Length 6y, height 33, diam. 17 mm. 



Length 65, height 2)2^ diam. 19 mm. 



Mozambique ; Zanzibar and Uganda. 

 Spatha pctersi von Martens, Mai. Bl., \7, i860, p. 218, pi. 



Ill, figs. I, 2. — Simpson, Syn., 1900, p. 899. 

 Midela petersi Clessin, Conch. Cab. Ano., 1875, p. 197, pi. 



LXII, figs. I, 2. 

 Spathella petersi Bourguignat, Mol. Af. Eq., 1899, p. 197. 

 Spatha modesta Lrv-\, Pr. Ac. N. Sci. Phila., VIH, 1864, p. 109 ; 



Jl. Ac. N. Sci. Phila., VL 1866, p. 37, pi. xiii, fig. 35; Obs., 



XL 1867, p. 41, pi. XIII. fig. 35.- 

 Platiris (Spatha) modesta Lea, Syn., 1870, p. 89. 



Two specimens of this are before me and they are in good 

 condition save that the beaks are somewhat eroded. The shell 

 is almost evenly long elliptical, slightly inclined to be rhom- 



