EEPORT ON THE LAMELLIBRANCHIATA. 287 



shalluwer tlian the attached valves. The}' are more or less tinted with rt'ddish-ljrown 

 externally, and, with the exception of a naiTow pale brownish border, are uniformly white 

 within. The ])licEe are rather similar in most specimens, not very large, and sometimes 

 interrupted towards the apex. The attaehed \'alves may be almost entirely or but very 

 little adherent. 



Plica tida sp. 



Habitat. — Amboina, 15 to 20 fathoms; and Flinders Passage, North Australia, iu 

 7 fathoms. 



A single valve from each of these localities probably belongs to Flicatula imhricata, 

 as identified by Sowerby in his monographs in the Thesaurus Conchyliorum and the 

 Conchologia Iconica, but on accoimt of the bad condition of the one, and the 

 immaturity of the other, I cannot affirm so definitely. 



Family L i M i D .i;. 



Lima, Bruguiere. 

 Lima squamosa, Lamarck (juv.). 



Lima squamosa, Lamarck, Anim. sans vert., oil. 2, vol. vii. p. 115. 

 Lima squamosa, Lischke, Japan, Meeres-Concb., Tlieil. i. p. 162. 



Hahitat. — Off Tenerife, in 70 fathoms; and Station 212, south of Mindanao, Philip- 

 pine Islands, in 10 fathoms. 



Only a single minute valve was obtained of this well-known species off Tenerife, and 

 a small perfect specimen at the Philippines. Its distribution is fuUy discussed by Lischke 

 in the above-named work. The British Museum collection contains specimens from the 

 Red Sea, Ceylon, Philippine Islands, Darnley Island, the Louisiade Archipelago, and New 

 Zealand. After a careful examination and comparison of these specimens with Mediter- 

 ranean examples, I have failed to discover any constant specific differences. The shells 

 may, as a rule, appear rather broader and the ribs a little stouter ; but other intermediate 

 forms occur, so that it seems impossible to draw a line of separation. The Lima pavci- 

 costata of the Conchologia Iconica, w^hich mav be different from that of the Thesaurus 

 Conchyliorum, I also consider a variety of this species. 



Lima lata, n. sp. (PI. XXIV. figs. 3-3a). 



Testa subcompressa, fere clausa, insequilateralis, obliqua, lata, antice oblique truncata, 

 profunde excavata, postice primo prope marginem dorsalem leviter incurvata, deinde late 

 arcuata, inferne semicirculariter curvata. Valvie mediocriter crassse, albse, costis radian- 



