118 



15. Anomia tenuistriata. 



Shell very variable in shape, regularly radiately striated ; sinus of 

 lower valve very large, ovate. 



Dorsal valve with three nearly equal muscular scars very close to- 

 gether ; the two lower small, placed close together side by side, just 

 on the lower margin of the upper scar, the hmder one being rather 

 behind the hinder edge of the upper one. 



Ostrea anomialis, Lamk. Hist. A. s. V. vi. 220. 



Anomia Ephippium, Befrance, Diet. Sci. Nat. ii. 



Anomia striatula. Desk. Coq. Foss. Paris, t. 6.5. f. 7, 11. 



Anomia tenuistriata, Desk. Coq. Foss. Paris, i. 377, in Lamk. 

 Hist. vii. 



Fossil, Grignon. 



The very characteristic scars of the dorsal valve are well shown in 

 M. Deshayes' plate above referred to, but not mentioned in the de- 

 scription. 



** Upper scar of dorsal valves large; two lower scars smaller, far be- 

 hind the upper one. Shell oblong, transverse. iExiGMA, Koch. 



16. Anomia ^nigmatica. 



Shell elongate, transverse, oblong, purple or yellowish, with a pur- 

 plish disk ; apex acute, considerably within the dorsal edge. 



The upper scar large, suborbicular, subcentral ; lower scars 2, much 

 more posterior, small, equal-sized, and nearly confluent. 



Tellina senigmatica, Chemn. Conch, xi. t. 199. f. 1949, 1950. 



Anomia rosea. Gray, Ann. Philos. 1825, 5. 



Anomia senigmatica, Alton in Wiegmann Arch. 1837, Verz. 21 ; 

 Reeve, Nomen. Conch. 



Hab. Indian Ocean. 



Var. 1. Elongate, purplish brown, smooth, flat. Chemn. I. a. 

 f. 1949, 1950. 



Hab. Indian Ocean, on the surface of flat wooden piles, &c. 



Var. 2. Like former, but more elongated, and the sides folded 

 together. 



Anomia naviformis, Jonas ; fide Mus. Cuming. 

 Enigma, sp. Koch ; fide Mus. Cutning. 

 Hab. Manilla. Mus. Cuming. 



Var. 3. Flat, smooth ; hke Far. 1, but yellow, with a dark purple- 

 brown transverse ray. 



Hab. Philippines. Mus. Cuming. 



Var. 4. Flat, purple ; like Far. 1, but often more ovate, and with a 

 few radiating ribs, ending in projections, making the edge sinuous. 



Hab. Singapore ; on piles of wood forming the wharves. Borneo. 

 Mus. Cuming. 



*** Tivo upper scars small ; lower one large. Shell suborbicular ; 

 sinus small. Patro. 



17. Anomia elyros. (Mollusca, pi. 4. fig. 1, 2.) 

 White, lamellar, closely radiatelv striated. 



