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22. 
CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 
Leaves not complicate, usually expanded in one plane.... 10 
Leaves distinctly complicate, the two portions meeting at 
a more or less distinct keel........... cece eee cece teens 22 
Leaves: SUCCHDOUS «uae orn Reewee dae a wie Hee ose ees II 
Leaves: iiCubOus «caciae hee aio atiewae O86 bese oe eee ore ese 19 
Leaves bidentate or bilobed......... prccrccttees 12 
Leaves with more than two teeth or lobes.............. 18 
Underléaves distinct cn saci de wes eke amare ee nee eds 13 
Underleaves none or very minute........ 00... eee eee eae 16 
Underleaves distinctly bifid... 060002 sc ces ed es cana eee anne 14 
Underleaves undiyided or with a few marginal teeth or 
GUL A Wivnenteinntn sn aarannteta rede 3 ee Og AN A lecit ckimicas Sime apes 15 
Sporophyte enclosed within a perianth....Lophocolea, p. 57 
Sporophyte developed within a pendent perigynium 
Geocalyx, p. 59 
Growing on rotten logs, often gemmiparous.............. 
Harpanthus, p. 50 
Growing on calcareous rocks, never gemmiparous........ 
Lophozia Muelleri, p. 53 
Perianth terete, more or less plicate at the mouth........ 
Lophozia, p. 52 
Petianth trigonous: .occaaccnset se cette stereos Set des Hoes 17 
Leaf cells 0.025-0.05 mm. in diameter....... Cephalozia, p. 50 
Leaf cells 0.01-0.02 mm. in diameter..... Cephaloziella, p. 61 
Leaves undivided, margin sharply toothed..Plagiochila, p. 56 
Leaves with three or four broad teeth...... Lophozia, p. 52 
Leaves bidentate at the apex; ventral flagelliform branches 
TOME: secs ints Suassiclan qarbediate Sle y Gea Has Miaiglay was Calypogeia, p. 62 
Leaves mostly with three or four teeth, lobes, or divisions 20 
Stems apparently dichotomous; ventral  flagelliform 
branches: Numerous 0 gats seciauet au nder ne aes Bazzania, p. 64 
Stems pinnately branched; ventral flagelliform branches 
MOMS: Ai teg ahaha sleldus ince avi bahamas aneae sland Ea OAS Team 21 
Divisions or lobes of leaves two or more cells wide, at 
least at the base; archegonia borne on short ventral 
DRATIGHES? wc uskey estan ds Ohya owe nid eae iade Lepidozia, p. 65 
Divisions of leaves only one cell wide throughout; arche- 
gonia borne on the main stem or on leading lateral 
Branches: ceca satel a sata oaaoaled ade Blepharostoma, p. 66 
Ventral lobe of leaf equaling or surpassing the dorsal in 
SUZ) teen Se scar Se Bui Spee ete asd bene SMR HRCA eb Rd eave ssh 23 
