168 72 
L. fragilis, Phil. (or L. lacteus L.).'| Sowersy (Marine shells of South Africa, 1892, 
p. 61) also states Port Elizabeth as the locality for L. fragilis, Phil.; this is, however, 
due to erroneous determination, as the most southerly limit of distribution for these 
forms is the Cape Verd Islands and Loanda Island. In the supplement to “Marine 
Shells of South Africa” SowErRBy also says, regarding Loripes clausus, Phil., from Natal: 
“This is the shell quoted by me, pl. 61, as Loripes lacteus” (according to SOWERBY 
L. lacteus L. is identical with L. fragilis, Phil.). In the specimens in the Museum 
in Copenhagen the cardinal and lateral teeth are entirely wanting; moreover, they 
do not at all resemble Luc. clausa, Phil. (= L. barbala, Reeve). Krauss’s descrip- 
tion of his specimens, which are also from Port Elizabeth, (“auf dem linken Ufer 
des Zwartkopflusses”)? corresponds exactly with L. edentula L., therefore I do not 
hesitate to put L. fragilis, Krauss = L. edentula L. Dunker’s figure (Index moll. 
mar. Japon., Pl. VIII, Figs. 7—8) of L. edentula L. testa junior, looks very remarkable 
and conveys the impression that the specimen figured must be abnormal. 
Lucina (Thyasira) ovum, Reeve. 
Lucina ovum, Reeve, Conchol. icon., VI, 1850, Lucina, Sp. 21. 
Eoripes  — = AnaGas, Proc. Zool. Soc. London, 1867, p. 926, No. 89. 
Koh Mak, sandy coast ('/2). 
Long. 15 mm. 
Distribution:— Andamans (Zool. Mus., Copenhagen). — Philippines, 
Botany Bay. 
As mentioned under L. vesicula, L. ovum is not easy to unravel. It is not 
so tumid as L. tumida, neither does the rather straight dorsal side pass so roundly 
into the posterior end, the transition being more sudden. A great many authors 
have looked upon Diplodonta globosa, Forsk., quite erroneously and have considered 
it to be identical with Luc. ovum, Reeve (for further details compare Diplodonta 
globosa, Forsk.). 
Lucina (Thyasira) bullula, Reeve. 
Lucina bullula, Reryve, Conchol. icon., VI, 1850, Lucina, Sp. 35. 
Cryptodon bullulus, Reeve, EvG. Smira, Rep. on the Lamellibranchiata of the Challenger Exped., p. 189. 
Between Koh Mesan and Cape Liant, 5—9 fathoms (?/2). West coast of Koh 
Chang, 10 fathoms, mud ('/2). N. of Koh Kahdat, 4—5 fathoms, coarse sand ('/2). 
W. of Koh Kut, 15 fathoms, mud (!/2). 
Long. 5— 10 mm. 
Distribution: — Amboina (“Challenger”), Adelaide, Port Essington (Brit. Mus.). 
1 Bucquoy, Dautzenberg et Dollfus, Moll. mar. de Roussillon, Il, p. 627, give the following 
measurements for L. lacteus: — long. 23 mm., alt. 22 mm., crass. 13 mm. Koper, Prodromus faunae 
moll. test. mar. europ. inhab., p. 370, gives the following measurements for L. fragilis, Phil.: — long. 
9 mm., alt. 10 mm. 
2 Die siidafrikanischen Mollusken, 1848, p.5, No, 3. 
