MotliUScA* 
395 
water expelled by inolitk or water-pore, br feotk. Mr. F. B. Doyle and Dr. 
Macalister added some particulars about tbe occurrence of the Pearl-Mussel 
in Ireland and Scotland, and the method of fishing for them and getting the 
pearls. 
Alasmodon impressa and A. rhomUcd are new species described by An- 
tkony, Ain. Journ. Conch, i. pp. 167 & 168, pi. 12. figs. 4 & 6, from Ten- 
nessee and Michigan. 
Monocmdylea. S. Petit de la Saussaye enumerates fifteen known species 
of this genus, Joum. Conch, xiii. pp. 15-19, and adds one as new, M. cam- 
hodiensis, p. 14, pi. 4. fig. 4. Ch. Wheatley has revised this list. Am. Journ. 
Conch, i. pp. 66-67, and enumerates 27 species, viz. 13 from continental Asia, 
2 fi-om Java, 8 from South America, 1 from Southern Europe, 2 doubtful 
from Africa, and 1 doubtful from Oceania. [The Recorder may add that 
he found one Javan species, M. vandenhuschiana, also in Sumatra and Borneo, 
and he does not think it to be sufficiently distinct from the Malaccan M. 
cumingiij Lea.] 
T. A. Conrad thinks that the Asiatic species of Monocondylca are 
generically distinct from the South American, and refers most of them to 
the genus P^eudodon (Gould, \d>iA') = Monodotitina (Conrad, 1852) j he pro- 
poses a new generic division, Leguminaia^ for M. mardinensis (Lea), and 
another, THgonodon^ for M. crehristriata (Anthony), Am. Joum. Conch, 
i. p. 233. He adds a new species, Pseudodon ellvpiimm^ 1. c. p. 262, pi, 26* 
fig. 1, Cambodia. 
Monocondylcea peguensis and crehristriataj sp. n., Anthony, ibid. p. 206, 
pi. 18. figs. 3 & 1, Pegu. 
Anodonta melinia,s^. n., Bourguignat, Revue Zool. 1866, p. 347, pi. 24, o 
Moll. houv. p. 164, pi. 28, Valencia. 
Anodo7i suhangidata, imh'itaia^ opaUna,^av(i, suhinjlata^ papy^'aced^ ^allida^ 
micans, glanduto^d, arid irisarts are new specie^ described by Anthony, Am, 
Journ. Conch, i. pp. 168-164, figured on pis. 13-16: from Michigan, with 
the exception of papyracea^ the locality of which could not be ascertained, 
and of micans, which is from Texas. 
Spatka alata, nyassaensis, and modesta, sp. n.. Lea, Proc. Ac. Nat. Sc. 
Pkilad. 1864, p. 109, Lake Nyassaj Spatha natatehsis, sp. n.. Lea, 1. b. 
p. 113. 
Arcondia, g. n., Conrad. Type Triquetrd lanceolata (Lea). Distinguished 
from the genus Triqueira (Klein =J5yn«, Lam.) by the teeth and muscular 
impressions* Am. Journ. Conch, i. p. 234. 
Castalia crosseana, s^). n., Hidalgo, Jouiri. Conch, xiii. p. 316, pi. l4. fig. 2, 
Ecuador. , 
MyTILIDtE. 
Mytilus haldi, Brusina, Verhandl. zool. -hot* Gesellsch. Wien, 1866, p. 39 
=AT. minimus, var. 8 (Philippi) =jf. minimus, var. squalidermis (Danilo et 
Sandri), Dalmatia. 
Modiota fdrnicata, sp, n., Cdrpenter, Ann. & Mag. Nat. Hist. xv. p. 178, 
Monterey. 
Mytilus (Modiolaria) combhita, sp. tt., L. Vaillant, Journ.- Oonbh; xiii, 
p. 122, Suez. 
