220 A. E.. Verrill on Shells from the Gulf of California. 
Near La Paz,—Capt. J. Pedersen. 
This species belongs to the subgenus, Oaryatis, of Rémer. 
Tivela elegans, sp. nov. 
The form is regular, transversely subelliptical, triangular above, 
nearly equilateral, slightly swollen at the umboes; the beaks but 
little prominent. Ligament short; lunule elongated, distinctly 
defined. Hinge narrow, not very strong. In the left valve 
the middle ones most prominent, rugose, palial sinus large, 
iddle 
mens show great variation in color. 
peony wave-striped with lighter and darker grayish brown, 
e the umboe iati 
aving mboes and two narrow radiating bands yellowish 
white. One is intricately and beautifully painted with rich 
reddish brown, In regular, concentric, waved and angulated 
£7 
and angulated bands, or in interrupted rays; in some the color 
_., 38 yellowish brown; in others the ground-color is reddish 
_ brown, with darker bands. The beaks are sometimes, but not 
usually, purplish ; the interior generally white, with a purplish - 
bonal stain. 
T. elegans. T. Hindsit. 
Length, 102 inches, 98 €2. 4 . 65 
Height, as: 8 80 465 58 62 
Breadth, “Boe ee “50 
i me Paz,—Capt. J. Pedersen; Acajutla and Realejo,—F. H. 
radley. 
This species varies somewhat in form, but is nearly always 
more el ae oval than 7: Hindsii, of which we have t ical 
specimens both from San Salvador and Zorritos, Peru, which 
agree exactly in form and color with Reeve’s figures. 7. Hindsit 
18 Short, triangular, with very swollen umboes, and the posterior 
end longest and a little produced, its sinus much r, and 
the ligament very short, the hinge stouter, with the lateral 
