MOLLUSCOIDA. 
607 
would Appear to be somewliat intermediate between the typical A. fungosa 
and A. hencdcni. Ann. & Mag. Nat. Hist. July 18G9, vol. ii. p. 71. 
riumntella arethusa, sp. n., Hyatt, 1. c. p. 96, pi. 8. figs. 1, 2, Maine and 
Massachusetts ; P. vitrea, sp. n., Hyatt, 1. c. p. 96, pi. 9. figs. 1, 2, Cambridge, 
Massachusetts. 
Frcdcricella xvalcottii, sp. n., Hyatt, 1. c. p. 90, pi. 15. fig. 2, Georgetown, 
Massachusetts ; F. pidchcrrmia, sp. n., Hyatt, 1. c. p. 91, pi. 16. fig. 3, 
White’s Bridge, Lake Sebago, Maine ; F. rcgina^ sp. n. (Leidy, MS.), Hyatt, 
1. c. p. 91, pi. 7. fig. 1, very generally distributed in North America and 
subject to great variety. 
Clapar^de’s description of Loxosoma kefcrsteinii will be found translated in 
Ann. k Mag. Nat. Hist. vol. i. 1808, p. 311. 
Gymnolaemata. 
Smitt, it will be seen from the following list of species and 
their synonyms, groups all the forms resembling each other into 
species, and then arranges the varied forms, which are often the 
species of other authors, into sections. This will be better un- 
derstood by the following example : — 
MolUa vulgaris (Moll.), typical iorm—Eschara vulgaris^ Moll. 
Forma sinnifera—Lepralia spinifera, Johnst., and synonyms. 
Forma ansata=tL. ansata, Johnst., and synonyms. 
F orma papillata = L. papillata, Busk. 
Forma = crtnr/jrfrt, Stimpson. 
Smitt, in continuation, describes in detail the following 
species : — 
Eschahiporidje (1. c. pp. 3-8 & 48-70) : — 
Escharipora Jigularis (Johnst.), Smitt, I, c. pp. 4 & 49, Taf, 24. figs. 2, 3 ; 
E. punctata (Hass.)(=X<? 7 ?ra//a crihrosa, Boeck), Smitt, /. c. pp. 4 & 61, Taf. 24. 
figs. 4-7 ; E. annulata (Fabr.), Smitt, 1. c. pp. 6 & 63, Taf. 24. figs. 8-10. 
Porina malusii (And.) {=Lejjralia hiforis, Johnst.), Smitt, 1. c. pp. 6 & 66, 
Taf. 24. figs. 11, 12 ; P. ciliata (Pall.) (= Flustra genisii, Aud., = P. insignisy 
Hass., L. pustulay Halyell), Smitt, 1. c. pp. 6 & 68, Taf. 24. figs. 13-19. 
A?iarth7'opora monodoti (Busk), Smitt, 1. c. pp. 8 &64, Taf. 24. figs. 20-24; 
A. horealis (Busk) Pustidipora gracilis^ Sars,= Onckopora borealis, Busk), 
Smitt, 1. c. pp. 8 & 67, Taf. 24. figs. 26-29. 
MYiiiozoiDiE (/. c. pp. 8-19 & 70-122) : — 
Eschaj’ella porifera, sp. n., Smitt, 1. c. pp. 9 & 70, Taf. 24. figs. 30-41, 
Spitzbergen (? — Esc1iara foliacea and E. landshorovii, Alder); E. palmata 
(Sars), Smitt, 1. c. pj). 10 & 77, Taf. 24. figs. 42-46 ; E. Ugentilii (Aud.) {=Lep. 
reticulata, McGill), Smitt, 1. c. pp. 10 & 81, Taf. 24. -figs. 47-62; E. ja- 
cotini (Aud.) (=il«^cq/?ora trispmosa, Johnst., f«nWosa, Johnst.), Smitt, 
/. c. pp. 11 & 86; E. auricidata (Hass.), Smitt, 1. c. pp. 12 & 90; E. lands-^ 
horovii (Johnst.), Smitt, 1. c. pp. 12 & 92 ; E. linearU (Hass.) (^—Lep. hastata, 
Hincks, —Eschara hiaperta, Mich.), Smitt, Z. c. pp. 13 k 96. 
Mollia vulgai'is (Moll.) (= Cellepora coccinea, Lov., —Lep. ciliata, Hass., = 
Lep. imicoimis, Johnst., =Ze/?. spinifera, Johnst., =X<?jt7. ansata, Johnst.), 
