^o.m2. SYNOPSIS OF THE VENERID.E— BALL. 411 



Tlate XIII. 



EAST AMERICAN VEXERID.K. 



Fig. 1. Dosinia {Dosinidia) discus Say, interior view. Cat. Xo. 54094, l^S.X.M.; 



length, 70 nam.; South Carolina; p. 379. 

 2. Chiune mazyckii Dall. Cat. Xo. 92022, U.S.X.M.; length, 15.0 nmi.; North 



Carolina; p. 382. 

 .3. rirela abaconis Dall. Cat. Xo. 103551, U.S.X.INI.; length, 11.0 mm. ; Abaco 



Island, Bahamas; p. 380. 



4. TrfoiseimeUucuhaniann Orh'igny. Cat. Xo. 54135, U.S.X.M.; length, 10.6mm.; 



St. Croix, West Indies; p. 379. 



5. Transennella conradina Dall, interior view, showing characteristic sulcations 



of the margins. Cat. Xo. 64437, U.S.X.M.; length, 11.0 mm.; West Flor- 

 ida; p. 379. 



6. Ci/thcrea [Vcntricola) caUunorpha Dall. Cat. Xo. 64292, U.S.X.JI.; length, 



15.5 mm.; Barbados; p. 382. 



7. Dosinia {Dosinidia) eh'i/ans Conrad, interior view. Cat. Xo. 6120, U.S.X.M.; 



length, 68.0 mm.; Texas; p. 379. 



Plate XIV. 



\\'E.ST A.MEKIfAX VEXERID.E. 



Fig. 1. Marcia kennn-Iei/i Carpenter. Cat. Xo. 23441, U.S.X.M.; length, 71 mm.; 

 Sitka, Alaska; p. 406. 



2. Paphia { Protothaca) staminca Courad, \Ariety suladosa DaW. Cat. Xo. 105421, 



U.S.X.M.; length, 55.0 mm.; San Ignacio Lagoon, Lower California; 

 p. 406. 



3. Vallocardia [Agriopoma) ratJiaria Dall. Cat. Xo. 93638, U.S.X.M.; length, 



52.0 mm.; Panama Bay; j). 402. 



4. dementia solida Ball. Cat. Xo. 126352, U.S.M.M.; length, 79.0 mm.; Topolo- 



bampo, Mexico; p. 401. 



Plate XV. 



WEST AMERICAN VENERID,E. 



Fig. 1. Liocyma liridis Dall. Cat. Xo. 160904, U.S.X.:M.; length, 31.0 mm.; Kyska 

 Harbor, Aleutian Islands; p. 407. 



2. Pitaria iomeana Dall. Cat. Xo. 109220, U.S.X.M.; length, 24.0 mm.; Tome, 



Chile; p. 402. 



3. O/dineUa singleui Dall. Cat. No. 168817, U.S.X.M.; length, 39.0 mm.: Yaqui 



River delta. Gulf of California; p. 404. 



4. Oijfherea (Ventricola) foeeolata variety lepidogb/pia Dall Cat. No. 103286, 



U.S.X.M.; length, 41.0 mm.; Acapulco, Mexico; p. 403. 



5. The same, vertical view, showing lunule and escutcheon. 



6. Cijtherea {Ventricola) magdaleme Dall. Cat. Xo. 109214, U.S.X.M.; length, 



42.0 mm.; Magdalena Bay, Lower California; p. 403. 



7. Cgfherea { Ventricola) fordi Yates. Cat. Xo. 120704, U.S.X.M.; length, 47.0 



mm. ; Catalina Island, California; p. 403. 



8. Venus apodema Dall. Cat. Xo. 6243, LT.S.X.M.; length, 47.0 mm.; exterior 



view of a somewhat worn specimen from Humboldt Bay, Ciulf of Panama; 

 p. 406. 



Proc. N. M. vol. xxvi— 02 28 



