4"8'6 axel a. olsson 



Explanation of Plate 13 



Figure P'age 



1-lb. Scolimytilus (Scolimytilus) esmeraldensis, new species 119 



All figures of the same shell showing various views and enlargement 

 of the hinge. Length 14.1 mm., height 9.6 mm., diameter 5.6 mm. 

 Esmeraldas, Ecuador. Holotype, ANSP 218929. 



2-2c. Scolimytilus (Scolimytilus) playasensis (Pilsbry and Olsson) 119 



Fig. 2, length 13 mm.; Fig. 2a, length 13.2 mm.; Fig. 2b, length 15.2 

 mm.; Fig. 2c, length 15.3 mm. Playas. Ecuador, PRI 25570. 



3. Brachidontes ? granulatna (Hanley) 112 



Length 20 mm. Paracas, Peru. PRI 25571. 



4-4a. Scolimytilus (Aeidimytilus) adamsianus (Dunker) 121 



Fig. 4, length 8.2 mm. Punta Centinella, Santa Elena, Ecuador. PRI 

 25572; Fig. 4a, length 14,5 mm. Jlpijapa (Puerto Callo), Ecuador. 

 PRI 25573. 



5-5a. Scolimytilus (Aeidimytilus) puutarensis (Pilsbry and Lowe) .121 



Fig. 5, length 11.7 mm. P'unta Carnero, Santa Elena, Ecuador; Fig. 

 5a, length 8 mm. a young shell, same locality as 5. PRI 25574. 



6. Scolimytilus (Aeidimytilus) adamsianus (Dunker) 121 



Length 15.8 mm. Punta Banda, Lower California. Mr. T. Burch. 

 PRI 25575. 



7-7a. Septifer zeteki Hertlein and Strong 122 



Height 5.5 mm. Jipijapa (Puerto Callo), Ecuador. PRI 25576. 



