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POPULAR SCIENCE REVIEW. 
b. Zooids on the ventral and lateral 
sides of the rhachis .... Fam. 2. Pennatulidae. 
Genera, Pennatula, Lam., Leioptilum, Verr. 
Ptilosarcus, Gray, Halisceptrum , Herkl. 
t Pinnules small Subsect. 2. Yirgularieje. 
a. Pinnules without a calcareous plate Fam. 1. Yirgularidae. 
Genera, Virgularia, Lam., Scytalium , Herkl. 
Pavonaria, Koll. 
b. Pinnules with a calcareous 
plate Fam. 2. Stylatulidae. 
Genera Stylatula, Yerr. Dubenia, Kor. and Dan. 
Acanthoptilum , Koll. 
BB. Rhachis without pinnules, polyps 
sessile Sect. II. SPICAT^E. 
a. Polyps on both sides of the rhachis 
in distinct rows Subsect. 1. Funiculineje. 
aa. Polyps with cells. 
a. No ventral zooids .... Fam. 1. Funiculinidae. 
Genera, Funiculina, Lam., Halipteris , Koll. 
(3. With ventral zooids . . . Fam. 2. Stachyptilidae. 
Genus, Stachyptilum, Koll. 
b. Polyps on both sides of the 
rhachis in a single series, or 
in distinct rows .... Subsect. 2. Junciformes. 
aa. Polyps without cells. 
a. Polyps large. 
aa. Rhachis elongated, 
cylindrical . . . Fam. 1. Kophobelemnonidse . 
Genera Kophobelemnon , Asb., Sclerobelemnon, 
Koll., Bathyptilum, Koll. 
/3(3. Rhachis short . . Fam. 2. Umbellulidse. 
Genus Umbellula, Lam. 
(3. Polyps small .... Fam. 3. Protocaulidse. 
Genera, Protocaulon, Koll., 
Cladiscus, Kor. and Dan. 
bb. Polyps with cells . . . Fam. 4. Protoptilidae. 
Genera, Protoptilum, Koll., Lygomorpha , 
Kor. and Dan., Microptilum , Leptoptilum, 
Trichoptilum and Scleroptilum, Koll. 
B. Rhachis expanded in the form of a leaf. Sect. II. RENILLEH3. 
Fam. 1. Renillidae. 
Genus, Renilla, Lam. 
II. Rhachis with a radiating arrangement of 
the polyps Sect. III. VERETILLEiE. 
A. Calcareous bodies long Fam. 1. Cavernularidae. 
Genera, Cavemularia , Val. Stylobelemnon, Koll. 
AA. Calcareous bodies short .... Fam. 2. Lituaridae. 
Genera, Lituaria , Yal., Veretillum , Cuv. 
Policella, Gray, Clavella, Gray. 
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