LUCINA 



Species 21. (Mus. Cuming.) 



LuciNA OVUM. Luc. testa transverse ovatd, tenui, vei/tri- 

 cosd, incsquilaterd,antice mbrostraid, concentrke tenu- 

 issime superfieialiter striata, lunula lanceolato-eordatd, 

 vix cOHcavd, cardine teimi, edentuld ; alhd. 



The egg Ltjcina. Shell transversely ovate, thin, ven- 

 tricose, inequilateral, subrostrate anteriorly, conspi- 

 cuously very thinly superficially striated, lunule lan- 

 ceolately cordate, but little concave, hinge thin, 

 toothless ; white. 



Hab. Island of Burias, Philippines (in coarso sand at the 

 depth of four fathoms) ; Cuming. 



The Litcina represented at Fig. 21 to 24 belong to a pe- 

 culiar type, of wliich the shell is very thin and ventricose, 

 without colour or pattern of sculpture, the hinge toothless, 

 and the ligament developed internally across the posterior 

 dorsal junction of the valves. 



Species 22. (Mus. Cuming.) 



LuciNA TUMIDA. Luc. testa suhorliculari, globosd, inrnqui- 

 laterd, tumidd, tenuissimd, antice subrostratd, concen- 

 trke SMhtiUssime superfieialiter striata, striis impressis 

 radiantibus exiliter decussatd, lunula ovaio-cordatd, 

 vix impressd, cardine edentuld ; alba. 



The swollen Lucina. Shell nearly orbicular, globose, 

 inequilateral, swollen, vei-y thin, subrostrate an- 

 teriorly, concentrically very finely superficially stri- 

 ated, faintly decussated with radiating impressed 

 striffi, lunule ovately cordate, but little impressed, 

 hinge toothless ; white. 



Hab. ? 



More globose and swollen than the former, lunule 



broader, and faintly rayed throughout with impressed 



striss. 



Species 23. (Rg. a, b, Mus. Cuming.) 

 LuciNA Philippiana. Ltic. testd transverse orbiculari, 

 valde inmiuilaterd, tenuiculd, inflatd, conee/drice rii- 

 goso-striatd, corrugatd, lunula vix tiulld; laded, epi- 

 dermide fuscescente ad latera et versus marginem ven- 

 tralein indutJ. 

 Philippi's Lucina. Shell transver.sely orbicular, very 



inequilateral, rather thin, inflated, concentrically 

 roughly striated, wj-inkled, scarcely any lunide ; 

 cream-colour, covered at the sides and towards the 

 ventral margin with a light brown epidermis. 

 Lucina edentula, Phdippi (not of Lamarck). 



Hab. ? 



Dr. Philippi considers that this is the species originallv 

 described by Linnseus as Venus edentula ; I do not, how- 

 ever, concur with this opinion. The term "subdiaphana," 

 from the Linuaean description in Mus. Ludov. Ulric. reg 

 p. 508, will not apply to the shell under consideration, 

 which is of rather an opake white, more or less covei-ed 

 with epidermis. The description being vei-y indefinite 

 throughout, and applicable to half a dozen species, I have 

 retained the name "edentula" for that which is un- 

 doubtedly the species so acknowledged by Chemnitz and 

 Lamarck. 



Species 24. (Mus. Cuming.) 



Lucina pila. Luc. testd suborbiculari, teiiui, inflatd. 

 valde globosd, subeequilaterd, concenirice rugoso-striatd, 

 lunula ovatd, impresso-concavd ; sordide albd, epider- 

 mide tenui marginem ventralem versus indutd. 



The ball Lucina. Shell nearly orbicular, thin, inflated, 

 extremely globose, nearly equilateral, eoncentricaUy 

 roughly striated, lunule ovate, impressly concave ; 

 dead white, covered with a thin epidermis towards 

 the ventral margin. 



Hab. ? 



Distinguished by its 

 lunule. 



iry globose form and hollo 



Fig. 25. (Mus. Cuming.) 

 The shell here figured proves t^ be a globos 

 L. edentula. 



For Sp. 25, see PL IX. 



Species 26. (Mus. Cuming.) 

 Lucina malum. Luc. testd suborbiculari, latiore quam 

 alia, ventricQsd, antice leviter excavatd, deinde subros- 

 tratd, concentrice creberrime acute striato-liraid, lu- 

 nula late ovatd, concavd ; semipellucido-albd, intus 

 vividi rufescenle-croced. 



May, 1850. 



