NO. 1312. SYNOPSIS OF THE VENERIDJE—DALL. 359 



this shell to be Lucinoid and to belong somewhere in the vicinity of 

 Here Gabb. 



Section Cha nielea M.oyc\\, 1853. Type, Venu.s (/allhialjmxwi^wH. 



Sculpture of narrow, close concentric waves or low lamellee, without 

 distal lamellation or radial sculpture; teeth entire; ligament exposed; 

 the escutcheon and lunvde smooth. 



This is Orti/gia Brown, 1827, not Boie, 1826; Jlermione Leach, 1852, 

 not of Blainville, 1828; Orthyg!a Morch, 1853; Chamelfm H. and A. 

 Adams, 1857; Ihircia (part) Romer, 1857, not of Koch, 1835, and 

 probably Parvivenun Sacco, 1900. 



Sul)oenus Gomphina Morch, 1853. Type, Yenu^ wuhiloxa Morch. 



Valves more or less rostrate, the surface usually smooth and pol- 

 ished, inner margins entire; dorsal margins gooved and beveled 

 beyond the hinge plate; the posterior right and two antei-ior left 

 cardinals grooved; ligament exposed. Pallial sinus short, free, and 

 rounded in front. 



Section (romphina s. s. Type, K andulom Morch. 



Valves usually heavv, solid, and very tumid: the lower edge of the 

 right nymph and the upper edge of the left posterior cardinal with 

 reciprocal rugosities. 



This is Marcia (H. and A. Adams part) Chenu, 1862, and Try on, 

 188tl:, not of Fischer, 1887; Ileinitapes Stoliczka, 1871, not Romer 

 (part) 1857; not Goiivphhui Chenu, 1862. 



Section J/«c/'^'c//,'*c?^§« Dall, 1902. Type, Venus dequilatera^ovf ^rhy. 



Valves more equilateral, trigonal and compressed, less heavy and 

 sometimes with feeble striation distally; nymphs and teeth entire, 

 smooth. 



This is Gomphina H. and A. Adams, 1857, not of Morch, 1853. 



Genus ANOM ALOCARDIA Schumacher, 1817. 



Type, Yenux^lJuctiiosa Linna?us. 



Valves rostrate, with a vernicose periostracum, sculpture obsolete 

 mesially ; the inner margins crenulate, the ligament exposed, the lunule 

 and escutcheon impressed; cardinal teeth entire, three in each valve, 

 the anterior right cardinal feeble, sometimes obsolete; pallial sinus 

 small, angular, sometimes nearly obsolete. 



Section Anonialocardhi s. s. 



Surface with predominantly concentric sculpture, vernicose perios- 

 tracum. and the adjacent surfaces of the posterior left cardinal and 

 right nymph minutely rugose. America and West Africa. 



This is Tr'iqitcti'n Anton, 1839, after Blainville, 1818, but not of 

 Conrad. 18-t6; it is Crypiograniina^ov^h^ 1853. 



Section AnomalodUcux Dall, 1902, Type, Cyfhrreai<<piamom Lamarck. 



Surface with reticulate subcqual sculpture, a dull paper}^ periostra- 

 cum, and the hinge without rugosities. Indo-China. 



« From Macer, not from /laKpo?. 



