ACL. ACR.] 



GASTEROPODA. 



395 



land snails and their allies ; the Branchifera are furnished with gills, and include 

 nearly all Palseozic shells of this Class. 



FAMILY BELLEROPHONTID.E. Bellerophon, Bucanella, Bucania, Phragmos- 



toma, Porcellia, Tremanotus. 

 FAMILY BULIMORPHID.E. Bulimorpha. 



FAMILY CALYPTR^EID^E. Capulus, Conchopeltis, Metoptoma, Platyceras. 

 FAMILY CHITONID^. Chiton. 

 FAMILY CLISOSPIRID^E. Billiugsia, Clisospira. 

 FAMILY CODONOCHILID.E. Codonochilus. 

 FAMILY CYCLONEMID^:. Cyclonema, Eunema, Holopea, Holopella, Platy- 



schisma, Orthonerna, Palseacmsea, Trochonema. 

 FAMILY CYCLORID.E. Cyclora. 

 FAMILY CYRTOLITID.E. Carinaropsis, Conchopeltis, Cyrtolites, Cyrtonella, 



Microceras. 



FAMILY DENTALILTXE. Dentalium. 

 FAMILY EUOMPHALID^E. Calaurops, Eccyliomphalus, Euomphalus, Omphalo- 



trochus, Ophileta, Pleuronotus, Straparollina, Straparollus. 

 FAMILY FUSISPIRID^. Fusispira. 

 FAMILY HELICID^E. Anthracopupa, Dawsonella, Pupa, Streptaxis, Strophites, 



Zonites. 



FAMILY LITTORINID^. Xenophora. 

 FAMILY MACLURIID^E. Maclurea. 



FAMILY NATACOPSID^. Callonema, Isonema, Naticopsis, Trachydomia. 

 FAMILY PATELLID.E. Lepetopsis, Tryblidiura. 

 FAMILY PLATYSTOMID^E. Orthostpma, Platystoma, Scsevogyra, Stropho- 



stylus. 

 FAMILY PLEUROTOMARIID^:. Helicotoma, Lophospira, Microdoma, Murchi- 



sonia, Pleuro torn aria, Raphistoma, Scalites. 

 FAMILY PSEUDOPHORID^. Pseudophorus. 



FAMILY PYRAMIDELLID^E. Loxonema, Macrochilina, Soleniscus, Zaptychius. 

 FAMILY ROTELLID^E. Anomphalus, Rotella. 

 FAMILY SUBULITID^E. Polyphemopsis, Subulites. 

 FAMILY TROCHID^E. Eotrochus, Palseotrochus. 

 FAMILY TURRITELLID^E. Aclisina, Turritella. 



Aclis, Loven, 1846, Index, Mollusc, litora 

 Scandin. occid. habit., p. 16. Not an 

 American Palaeozoic genus. 



minuta, see Aclisina minuta. 



robusta, see Aclisina robusta. 



stevensoni, see Aclisina stevensoni. 



swallovana, see Aclisina swallovana. 

 ACLISINA, DeKoninck, 1881, Faune du Cal- 

 caire Carbonifere de la Belgique Ann. d. 

 Mus. Hoy. d'Hist. Nat., t. 6, p. 86. [Ety. 

 diminutive of Aclis.'] An elongated, 

 banded, conical, spiral shell ; distin- 

 guished from Murchisonia by its oval 

 aperture, and from Loxonema by its 

 spiral bands. Type A. striatula. 



minuta, Stevens, 1858, (Aclis minuta,) 

 Am. Jour. Sci., vol. 25, p. 259, Coal Meas. 



robusta, Stevens, 1858, (Aclis robusta,) 



Am. Jour. Sci., vol. 25, p. 



259, and Geo. Sur. 111., vol. 



5, p. 596, Coal Meas. 

 stevensoni, White, 1882, (Aclis 



stevensoni,) Rep. Invert. 



Foss. New. Mex., p. xxxv, 



Coal Meas. 

 swallovana, Geinitz, 1866, 



(Turbonilla swallovana,) 



Carb. und Dyas in Neb., p. 



5, Coal Meas. 

 Acroculia, Phillips, 1841, Pal. 



Foss. Cornwall, Devon, and F t 



W. Somerset, p. 93, syn. Aclisina 



for Platyceras. swallovana. 



angulata, see Platyceras angulatum. 



