ISOPODA. 
Crust. 46 
and each individual commences for itself an entrance into the wood ; 
Limnoria does not need clear water, as Teredo does, but even enters wood 
covered by a thick layer of extraneous matter ; it attacks all sorts of 
wood, and saturation with creosote appears to be the best preservative 
against it. 
Joera alhifrons (Leach) = copiosa (Stimps.) = nivalis (Pack.) ; North 
American specimens fully described by Harger^ Rep. Isopod. pp. 316-319, 
pi. i. figs. 4-8, common on the whole coast of New England. 
Janira alia (Stimps., as Asellodes)^ New England, north of Cape Cod 
and Fundy Bay, and spinosa (Harger), Banquerean, Nova Scotia, 300 
fath. ; id. 1. c. pp. 321-324, pi. ii. figs. 9 & 10, pi. iii. figs. 12 & 13., 
Munna fahricii (Kroy.) ; id. 1. c. p. 325, pi. iii. fig. 14, Casco Bay and 
Bay of Fundy. 
Ontschx^. 
Philoscia vittata (Say) ; Harger, 1. c. p. 306, pi. i. fig. 1, New Jersey to 
Massachusetts. 
Trichoniscus albiduSy sp. n. (Budde..Lund, MS.), Meinert, Nat. Tidskr. 
(3) xii. p. 469, Copenhagen. 
Titanethes feneriensis, sp. n., C. Parona, Atti Soc. Ital. xxiii. pp. 50-58, 
pis. i. & 2, from a cavern in Monte Fenere, Val. Sesia, Italy. 
Platyarthrus hoffmannseggi (Brot) found in Belgium ; J. MacLeod, 
CR. ent. Belg. xxiii. p. Ixxv. 
Actoniscus ellipticus (Harg.) : Harger, 1. c. p. 309, pi. i. fig 3, New 
Haven and Long Island Sound. 
Haplophthalmus danieus (Budde-Lund), Denmark, distinct from mengii 
(Zaddach, as Ilea') =: elegans (Schobl.), which has been found in Danzig, 
Bohemia, and Suabia ; Meinert, Nat. Tidskr. (3) xii. pp. 467 & 468. 
Scyphacella arenicola \ Harger, 1. c. p. 307, pi. i. fig. 2, New 
Jersey and Massachusetts. 
Armadillidium sulcatum (M.-Edw.) = opacum (Koch), Denmark; 
Meinert, 1. c. p. 467. 
Sph.®romidj;. 
Sphceroma quadridentatum (Say) ; Harger, 1. c. pp. 368-371, pi. ix. 
fig. 53, New England. 
Sphceroma obtusum (Dana); Kossmann, Zool. Reis. ii. p. 112, pi, x. 
figs. 4-10, Red Sea. 
ClROLANtDJJ. 
Cirolana cbncharum and polita (Stimps.) ; Harger, I, c, pp. 378-382, 
the former pi. ix. fig. 68, pi, x. figs. 59-63, New England. 
Cirolana arabica, sp. n., Kossmann, 1. c. p. 114, pi, viii. figs. 7-12, & 
pi. ix. figs. 1-4, Red Sea. 
Corilanay g. n. ; distinct from Cirolana by a well-developed, many- 
toothed molar process, and rudimentary incisive process on the mandible ; 
1880. [voL. XVII.] B 19 
