LUCINIDiE. 211 



LoRiPKs, Poli, 1791. 



Etym. — Lorum, a strap ; pes^ a foot. 



Syn. — Lucinidea, d'Orb. Glissocolus, Gabb, 1869. 



Distr. — 25 sp. Atlantic, Mediterranean, West Indies. Fossil. 

 Eocene — ; France. Cret. ; California, L. edentula^ Linn, 

 (cxix, 41 \ 



Animal with the margin of the mantle notched ; incurrent 

 tube long. 



Shell almost equilateral, cancellated, or sculptured by flexuous 

 strige ; lunule short ; caxtW&^e quite inlernal ; teeth, one cardinal 

 in the right, and two in the left valve; laterals remote, and some- 

 times indistinct. 



AUSTRIELLA, Tenison-Woods, 1881. A rounded-oval shell, with 

 concentric lamellae, covered by a brown epidermis which extends 

 over the interior side around the margin, forming abroad band; 

 hinge thick, with an inconspicuous arcuate smooth tooth ; inte- 

 rior surface white with radiating obsolete ribs, not nacreous, 

 without pallial sinus. 



A. sordida, Tenison-Woods. Port Denison, Australia, in fresh- 

 or brackish-water swamps. This shell was supposed by the 

 describer to belong to the familj^ TJnionidse, and to be closely 

 allied to Spatha, but it is evident he is not acquainted with the 

 latter genus. Judging from the description and figure it appears 

 to me to be a Lucinoid shell, closely allied to if not identical 

 with Loripes. 



Cryptgdon, Turton, 1822. 



Syn. — Axinus, J. Sowerbj', 1823. Thysaira, etc.. Leach. Be- 

 quania, Leach. Ptychina, Philippi, 1836. Thiatyra, G. Sowb. 



Distr. — 16 sp. Europe, etc. Fossil, 3 sp. Eocene; United 

 States, Europe. G.flexuosuH^ Montf. (cxix, 48). 



Animal with the mantle-margin thickened, open, not prolonged 

 into tubes ; foot long, subcylindrical, and very slender. 



Shell globular, posterior side furrowed or angulated, umbones 

 much recurved ; lunule short or indistinct ; ligament usually and 

 to a certain extent external, placed in a groove on the hinge-line, 

 and outside the hinge-plate ; teeth altogether wanting. 



In C. fiexuosus, the hinge-plate is indented in the right valve 

 immediately below the beaks, and slightly reflected in the left, 

 which gives that valve the appearance of having an indistinct 

 or obscure cardinal tooth. 



Philts, Fischer, 1864. 



Distr. — P. Gumingii.1 Fischer (cxix, 49, 50). Moluccas. 



Shell ovate, higher than long, inflated, thin, finely concentrically 

 striated and with a posterior duplicature extending from the 

 beaks ; hinge edentulous, lunula small and ver}' deep, forming a 



