1. 1 M A. 



Genus LIMA, Brwjiuh;. 

 Testa hivalvis, unimuscidosa, libera aut hi/.tio adhivi-i-ns, 

 eqiiivalvis, biauriculata, pleramqiie ohliiiae m-ata 

 ant siilitrigona, costis frequenter squamiferi^ aut 

 striis rmliata ; cardiiie recto, edentuln, (areola tri- 

 gona in medio arcm mhtrigonoi cartilaffini'oi reri- 

 pienti ; iimhonih'isana trif/ini'l .•ieparntm. Epi'lcr- 

 mis fusma, tenuia. 

 Shell bivalve, with one muscle, free or adhering by a 

 byssus, eqni valve, biauriculatecl, general ly obliquely- 

 ovate or subtrigonal, rayed with fre(|uently si|ua- 

 miferous ribs or strise ; hinge straight, toothless, 

 with a trigonal pit in the middle of a triangular 

 area receiving the cartilage : umboes separated 

 by a trigonal area. E]uderniis lirown, thin. 

 Of the twenty-five species enumerated in the folUiw- 

 ing nrmograph, seven or eiflfht, including S. sqiiniiKOia, 

 .lie iuh:il)itants of the Red Sea and Mediterranean. Our 

 iiwn seas I'ontribute five species, and the largest of all, 

 L. vxrarata, is found in Norway. There are also a t'ew 

 .\ustralian, Philippine, West Indian, and Scutli Sea 

 species, with a few whose localities are scatterrd over 

 the Indian and other Seas. A triangular disc contain- 

 ing a smaller triangular cartilagin(Uis pit, and sepa- 

 i-ating the umboes, distinguishes this genus from tlie 

 rertoif. 



Most of the species have an hiatus between the an- 

 terior margins of their valves, for the passage of a 

 byssiis of attachment. Some gape on both sides, and 

 others are closed nearly all round. Tlic giiiu]i of 

 eipiilateral shells such as Lima hiiUiil<i., [vam- bi< n 

 separated under the name of Liiiuduli. A ■■ Lima's 

 nest" is a collection of Xullipores, which the animal 

 strings together by means of the byssus, in the midst 

 nf which it finds shelter. 



Species L (Mas. JefTri 

 \ LoscoMW. Liiii. tcstd tetuii, 

 tissiiiie :itriat(^, fiix i-hnisd, nbliqii 



propr uKU-juiem r,;, 

 cardinnti parvA, nm-ici, 



Lo.scomb's Lim.v. Shell thi 

 striated, nearly closei 

 riorly sub-angular ne: 

 area small : auricles i 



Licwir. Sowerliy's (renrra. 



Li)na /mllata, Turt.Mi. 



IIoA British Sc^as. 



latere 

 ilatiin 



e.Kcavatfd in an anr^i 

 large, anterior small. 



Chemn-itz. Conch. 7, p. •'i') 



Ilab. Norway. 



< ,„/„r: 



'.pdaUi 



(M. 



(Fig. a, h, Mus, Br 



■„„;, ,i,l I^,t,-n, jn-c 

 l,ih,rn,l„ti^ nidi., 

 ■a,u,ri,-uli, 



.lUpl 



cnni:„dil„t„,i„l 

 ma:/,us, i,qnalihuH. 



Tin; liui-nous Lima. Shell thick, rather straight, rion 

 gately ovate, very ventricose, nearly closed at the 

 side, rayed with numerous minutely tubercvdated 

 ribs ; hinge margin broad, with a single fold be- 

 neath the'anricles: auricles large, equal. 



BoKX. Mus. Ca-s. Vind. 



llah. SorsOLTOn. 



November, 187: 



