MOLLUSCA. 
549 
LiTTORINIDiE. 
Tcctaria armnta^ sp. n., Issel, Malac. mar. ross. p. 192, pi. 2. fig. 7, Suez. 
Littorina. The species of this genus are described, and a new subgeneric 
name for L. ohtusata (L.), Neritrema, is proposed by R4cluz, Act. Soc. Linn. 
Bordeaux, xxvii. [II. & A. Adams have employed the name Neritoides 
(Brown) for the same subgenus, Gen. Moll. i. p. 314.] 
Littorina cinerea, sp. n., Pease, Am. Joum. Conch, v. p. 78, pi. 8. fig. 14, 
Marquesas. 
Littorina sitchana (Philippi) comprises as varieties : — L. kurila (Midden- 
dorfi), subtenebrosa (MiddendorfF), cincta (Gould), castanea (Adams & Reeve), 
rudis (Cooper, not Montagu), and tenebrosa^ var. (Schrenck), common in 
Japan. Lischke, Moll. Jap. p. 78. 
Littorina obtusata, var. costuarii, Jeffreys, Brit. Conchol. v. p. 205, pi. 101. 
fig. 8, abundant between tidemarks on the banks of the river Deben, near 
Sutton. 
Ijacuna tenella^ sp. n., north of Hebrides, in 189 and 660 fathoms. Jeffreys^ 
I c. fig. 7. 
CretnnooonchuSj new name for Crcmtiobates (see ^ Zool. Record ’ for 1 807, 
p. 540), which is preoccupied. Adult shell described. Occurs from 30 to 
60 miles from the sen. Blanford, Ann. & Mag. Nat. Hist. iii. p. 343. 
liisella isseli and inp-acostata, spp. nn., figured in the Descript, de I’Egypte, 
pi. 6. figs. 35 a, b, and 40, described by Issel, Malac. mar. ross. p. 195, Suez. 
Modulus JloridanuSf sp. n., Conrad, Am. Journ. Conch, v. p. 107, pi. 12. fig. 6, 
Florida. 
PLANAXIDiE, 
Planaxis, sp., from the Gulf of Akaba, shortly described by Issel, Malac. 
mar. ross. p. 190. 
Planaxis atra, sp. n.. Pease, Am. Journ. Conch, v. p. 72, pi. 8. fig. 4, Mar- 
quesas Islands. 
Litiopa savignyi, sp. n., figured in the Descript, de I’Egypte, pi. 3. fig. 19, 
named and described by Issel, 1. c. p. 197, Suez. 
RiSSOELLIDiE. 
Fairbayikia ? (an Bithynia?) turrita, sp. n., Blanford, Proc. Zool. Soc. 1809, 
p. 446, Kyoukpong, in flumine Iravadi ?, ‘Gooks like an estuary shell.” 
RiSSOIDiE. 
Pissoina seguenziana, sp. n., figured in the Descript, de I’Egypte, pi. 4. fig. 3, 
named and described by Issel, Malac. mar. ross. p. 409, Suez. 
liissoina balteata, sp. n.. Pease, Am. Journ. Conch, v. p. 72, Sandwich 
Islands. 
lUssoa gemynula, sp. n., Fischer, in Berchon, Fonds de la Mer, p. 161, pi. 23. 
fig. 3, Gulf of Gascony, somewhat allied to dolium (Nyst). — JRissoa millcri, 
sp. n., Folin, ibid. p. 143, pi. 22. fig. 6, St. Vincent, Oape-Verd Islands. 
Itissoa freminvillei, desmarestii, and d'orbignyi (Audouin), P. sismondiana, 
sp. n., described and named by Issel, /. c. pp. 202-205, Red Sea. 
Pissoa poly chroma and P. angulifercns, spp. nn., Folin, Fonds de la Mer, 
pp. 133, 134, pi. 16. figs. 5 and 6, Bay of Panama. 
