L /E D A. 



Gcrjus I, .EDA, Schumacher. 

 Testa bimu.sciilvsti, (equivalvis, oblonga, plus minusve 

 euneifonnis, clausa, postice producta et attenuata, 

 iiitiis nacrea ; margine cardinaii angulato, dentibus 

 iitrinque mimerosis, acutif ; Ugamento interno. 

 Shell himuscular, cquivalve, oblong, more or less cunei 

 form, closed, produced and attenuated posteriorly, 

 pearly within ; hinge margin angular, teeth nume- 

 rous and acute on both sides; ligaments internal. 

 Genus Lembiiliis, Itisso. 

 The shells of this genus are fairly enough dis- 

 tinguishable from those of the genus XucfLA on one 

 hand and from the Yoldi.e on the other ; from tin- 

 former by the angular production of the hinder side of 

 the shell, and from the latter in having the shell closed 

 all round, and the hinder part being uttonunted and 

 beaked, which Ynldia is not. 



The very elongate and lanceolate forms such as 

 elongata and tellinoides have been separated under 

 the name Adr.\nco as presenting an a]ipearance not 

 much akin to such shells as Lceda j)ermda and Lceda 

 pulita, but in such species as Lceda decora and Lceda 

 polita we observe a manifest gradation between the 

 two groups. 



L^D.*, like its generic ally, may be reckoned among 

 the most widely distributed genera, considering the 

 comparatively small number of its species, which are 

 foinid not only in northern seas such as those coasting 

 Siberia and Great Britain, but in Australia in the 

 south, and from the Cape of Good Hojic upwards. 

 Some are found in Japan and others in the West 



Species 1. (Fig. a, b. Mus. Brit.j 

 Lm)A SowERBYAN.\. Lced. testA, elongata, cleganto.r 

 laiiceo/atd, compressd, subcequilaterali, ulbidd, semi- 

 pellucidd, oblique striata, vtrinque 

 medio depressd, margine dur.^ali 

 ared compressd marginato : im 

 nlrinque versiis teniuiius concncu, 

 terniiiio autico subtrunratd. jmstico 



Noveml 'e 



cute rostratd, 

 trinqiie recto, 

 line rentrali 

 edio convexo ; 

 ubacuminato. 



rEUiiv's L.EfiA. Shell elongated, elegantly lanceo- 

 late, compressed, subequilateral, whitish, semi- 

 pellucid, obliquely striated, acutely rostrated at 

 both ends, depressed in the middle ; dorsal margiu 

 sn-aight, on both sides bordered with a compressed 

 area; ventral margin concave on each side to- 

 wards the ends, conve.x in the middle ; anterior 

 termination subtruncated, posterior subacumi- 



nafccl. 

 D'OiiBKiNY, as per Ilanley. 



Thesaurus. La^da. No. 

 Xiicula lancailatii. Sowerby i 



nor Lamarck. 

 Xucida ehitigala. Valencieni; 

 Hub. Xipi.xapi. 



Of a more elegantly lance 

 than Lwda elongata. 



Nuculida> in Sowerliy' 



d attenuated form 



Species 2. (Fig. a, b, Mus. Brit.) 



LiED.\ Ki,ECT.\. LcBd. tcstd soUdmsculd, elongato-lancto- 

 latd, .-tiibcequilateralis, compressd, ■dbidd, aliliqui- 

 striatd, utnnquc rostratd, rostra /I'lslica tiin/iildtu. 

 oblique truncato, margine crentdulo. una ilui.<ali 

 depressd, leviter arcuatd. 



The chosen LiED.\. Shell rather M.lid, elongat;.!- 

 lanceolate, subequilateral, compressed, whitisli. 

 obliquely striated, rostrated at each end, posterior 

 rostrum angular, obliquely truncated, margin 

 cronulated, dorsal area depres.sed, slightly arched. 



A. .Vdams. Proc. Zool. Soc, I806, \>. 48. 



Hab. Santos, Brazil. 



