160 
MOLLUSCA. 
Catinella, g. n. Shell planulate, fragile, spire rudimentary ; habits arboreal. 
Types C. (Succinea) ruhida (Pease) and explanata (Gould). Pease, P. Z. S. 
1871, p. 469. 
Truelluj g. n. Shell elongate, slender ; aperture contracted behind. Types 
T. {Succinea) elongata (Pease), prom-a (Gould), 2 m^infundihuliformis (Gould). 
Id. ibid. 
Limnophila. , 
Auriculid^. 
Pythia tortuosa, sp. n., Mousson, J. do Conch, xix. p. 19, pi. »8. fig. 6, 
Tonga I. 
Melampus cassidtdus (Gass., 1867) is renamed Cassidula halteata : Gassies, 
Act. Soc. L. Bord. xxviii. p. 120. 
Plecotrema striatum (Phil.) and clausum (A. Ad.), Sandwich I., described 
by Pease, P. Z. S. 1871, p. 468. P. mordax (Dohrn), Martens & Langkavel, 
Don. Bism. p. 55, pi. 3. fig. 8, Paumotu I. 
3Ielampus ornatus and tongaensis, Mousson, J. de Conch, xix. pp. 21 & 22, 
pi. 3. figs. 7 & 8, Tonga I. ; leai, Gassies, Act. Soc. L. Bord. xxviii. p. 116, 
New Caledonia : spp. nn. 
Melampus mucronatus (Gould, 1849) = orpsu (II. & A. Adams, 1854) : 
Pease, P. Z. S. 1871, p. 470. 31. castaneus (Mhlfld.), parvulus (Nuttall), cqffer 
(Kiist.), and tccniola (Hombr. & Jacq.), Martens & Langkavel, 1. c. p. 66, pi. 3. 
figs. 9-12, Polynesian I. j and on variability of kcteus (Quoy & G.), iid. ibid. 
p. 65. 
Lcemodonta conica (Pease, 1862)=a/maews*s (Mouss., 1869) : Pease, P. Z. S. 
1871, p. 479, and J. de Conch, xix. p. 94 ; figured by Martens & Langkavel, 
1. c. p. 67, pi. 3. fig. 13, Paumotu I. 
LlMN42IDiE. 
Limncea stagnalis (L.). The numerous varr. of this sp. are treated by 
Kobelt (Mai. Bl. xviii. pp. 108-119, pis. 2 & 3) in a similar way to his dis- 
cussion of L. auricularia {cf. Zool. Bee. vii. p. 164), with reference to the 
various qualities of water and ground in and on which it is found. The forms 
regarded as distinct spp. by Bourguignat, Parreyss, and Ziegler, and the N.- 
AmQvicim jugularis (Say) are judiciously reunited to stagnalis as local varr. ‘ 
Limncea appressa (Say), from Lake Champlain (? specifically distinct from 
the European stagnalis), and L. megasoma (Say) : lingual dentition described 
and figured by Bland & Binney, Am. J. Conch, vii. p. 161, pi. 12. 
Limncea peregra, var. ccerulea^ Clessin, Nachr. malak. Ges. iii. p. 127, 
Bavaria. L. maritima (Jefir. ?), Westerlund, Exp. crit. p. 110, Sweden. 
Limncea Jiuminensis, sp. n., ventricosa, and ampla (Hartm.), allied to auri-^ 
cularia (L.), comparatively described from specimens living in pools on the 
banks of the Danube in Bavaria ; Clessin, CB. Ver. Begensb. xxv. no. 10. 
Limncea lagotis (Schr., 1803)=acw^a (Jefir., \Q^^)=vulgaris (Bossm. pt., 
Kobelt, nec Pfr.) ; Martens, Nachr. malak. Ges. iii. pp. 121-123. 
Limncea davidi, Deshayes, N. Arch. Mus. 1871, Thibet j tazewelliana, Wolf, 
Am. J. Conch, v. p. 198, pi. 17. fig. 2, N. America : spp. nn. 
' Pompholyx efusa (Lea), lingual dentition : Bland & Binney, Am. J. Conch, 
vii. pp. 312 & 313, pi. 19. 
