134 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 23 



Hinnus Gray, 1826, p. 362. [Invalid emendation of Hinnites Def ranee.] 

 Hynnites Herrmannsen, 1847, p. 547. [Invalid emendation of Hinnites 

 Def ranee.] 



Original diagnosis: Coquille bivalve, inequivalve, adherente, auri- 

 culee, herisee ou rude; a valve inferieure, couverte de cercles concentri- 

 ques; a valve superieure, rayonee longitudinalement ; a fossette profonde 

 pour le ligament ; impression musculaire placee du cote oppose a celle des 

 huitres. 



Additional diagnosis: Juvenile shell of Chla?nys form, moderately 

 convex, slightly higher than long, and with numerous small and usually 

 spinose ribs. Shell attaching to foreign object (during adolescence) by 

 right valve, that valve then becoming more convex, distorted in outline, 

 irregularly compressed at margins and coarsely sculptured ; left valve 

 becoming distorted to match right, but seldom increasing greatly in 

 convexity and with sculpture less coarse; original outline of anterior 

 auricle of right valve bften obliterated by surrounding deposit of shell. 



Remarks: This genus includes only six known living species. In the 

 western Atlantic and Mediterranean it is represented by pusio (Linne) 

 (= Pecten distortus da Costa, Ostrea miniata Born, O. sinuosa Gmelin, 

 O. multistriata Poli, P. Isabellae Macgillivray, P. spinosus Brown, 

 Hinnites irregularis Deshayes). Hinnites absconditus P. Fischer in 

 Locard has been reported only from the Cape Verde Islands and Sierra 

 Leone, west Africa. The West Indies species is adamsi (Dall), known 

 only by a left valve found of¥ St. Vincent, Windward Islands. In the 

 eastern Pacific 7nultirugosus (Gale) ranges from the Aleutian Islands 

 to Lower California. The southeast Pacific pasca (Dall), reported only 

 from Easter Island, is known by six single valves; the holotype, a left 

 valve, is in the U.S. National Museum ; another left valve is in the 

 California Academy of Sciences, San Francisco; the author's collection 

 contains the only right valve known (collected in 1956) and three left 

 valves, one collected in 1953 and two in 1956. Sowerby's corallinus is 

 native to east Africa and has recently been reported from the Bonin 

 Islands, Japan. 



Hinnites multirugosus (Gale) 1928 

 Plates 45-49 



Liyna gigantea Gray, 1825, p. 139. 



[non] Plagiostoma gigantea J. Sowerby, 1814, p. 176, pi. 77. [Jurassic. 



Plagiostoma proposed as section of Lima by J. Sowerby, 1814, p. 



175 ; Gray's Lima gigantea thus preoccupied.] 



