LAMELLIBRANCHIATA. 
Moll. 99 
Dacrydium meridionale , sp. n., Prince Edward I., id. t. c. p. 282, pi. xvii. 
fig. 2. 
Idas dalli , sp. n., W. Indies, id. t. c. p. 281, pi. xvi. fig. 10. 
Dreissena lacustris, D. ornata , spp. nn., Grand Bassam (Congo), Morelet, 
(268) p. 32, pi. ii. figs. 10 & 11. D. cochleata , Nyst, recorded from near 
Antwerp, with a sketch of the history of the species ; Raeymaekers & De 
Loe (302). 
Modiola watsoni, sp. n., Philippines, Smith, (311) p. 275, pi. xvi. fig. 5. 
Modiolarca bicolor, sp. n., S. Georgia, v. Martens (253) p. 93. M. leer- 
guelensis, sp. n,, Kerguelen, Smith, (341) p. 280, pi. xvi. fig. 8. 
Myrina coppingeri, sp. n., N. Australia, 1400 fath., icl. t. c. p. 281, 
pi. xvi. fig. 9. 
Mytilus meridionalis, Southern Ocean, M. leerguelenensis , Kerguelen, 
spp. nn., id. t. c. pp. 273 & 274. M. magellanicus, Link., M. chorus , 
Molina, Campbell I., Filhol, (122) p. 544. M. pellucidus and M. edulis : 
remarks on relationship and occasional poisonous qualities of ; v. Martens, 
(256) p. 193 ; on the last see also Virchow & Salkowsky, p. 43. M. 
edulis : some details of breeding ; see M’Intosh, (242), also p. 39. M. 
edulis : account of its reproduction, segmentation of the arms, and free 
young stage; Wilson, Rep. Brit. Ass. p. 1094. 
Arcim:. 
Area profundicola, sp. n., Verrill, (367) p. 439, pi. xliv. figs. 23 & 23a, 
off Chesapeake Bay, 2000 fath. A. (Barbatia) pteroessa, p. 262, pi. xvii. 
fig. 4, N. Pacific, 2050 fath., N. Atlantic, 1675 fath., and W. Indies ; A. 
(B.) corpulenta , p. 263, pi. xvii. fig. 5, 1ST. Australia, 1400 fath., Mid- 
Pacific, 2425 fath., A. (B.) imitata , N. Pacific, 2900 fath., A. (Acar) 
congenita ,, p. 264, pi. xvii. fig. 6, Philippines, A. (Scapharca ?) consociata , 
p. 266, pi. xvii. fig. 7, Arafura Sea, A. ( S . ?) incequisculpta , p. 267, pi. xvii. 
fig. 8, A. (S.?) culebrensis , p. 268, pi. xvii. fig. 9, W. Indies, A. ( Macro- 
don) dalli, p. 269, pi, xvii. fig. 10, Japan, spp. nn., Smith (341). 
Glomus Jeffrey si, p. 248, pi. xxi. fig. 1, G. simplex , p. 249, pi. xxi. fig. 2, 
G. incequilateralis, p. 249, pi. xxi. fig. 3, W. Indies, G. japonicus, p. 325, 
woodcut, Japan, spp. nn., id. t. c. 
Pectunculus beddomei, sp. n., Bass’ Strait, id. t. c. p. 252, pi. xyiii. fig. 1. 
Limopsis marionensis , p. 254, pi. xviii. fig. 2, Marion I., L. pelagica , 
p. 254, pi. xviii. fig. 3, Mid-Atlantic, 1850 fath., off Japan, 345 fath., L. 
straminea, p. 255, pi. xviii. fig. 5, Southern Ocean, L. torresi , p. 255, 
pi. xviii. fig. 4, N. Australia, L. bassi, p. 256, pi. xviii. fig. 6, S. Australia, 
L. lata , p. 257, pi. xviii. fig. 7, Kew Zealand, spp. nn., id. t. c. L. plana 
and L. affinis, spp. nn., Verrill, (367), pp. 441 & 442, off Chesapeake Bay, 
2200 and 197 fath. 
Nuculimc. 
Leda semen, p. 231, pi. xix. fig. 2, Brazil, L. decipiens , p. 232, pi. xix. 
fig. 3, L. inaudax, p. 233, pi. xix. fig. 4, W. Indies, L . confinis, p. 233, 
pi. xix. fig. 5, Azores, 1000 fath., L. solidula, p. 233, pi. xix. fig. 6, Brazil, 
