344 HYDROIDtE. Part IV. 



8th Family. PENNARiDiE McCr} (restricted). 



Peniicaria Goldf. (non OJcen). See p. 278. 



P. distycha Goldf. — Sertularia peunaria Cav., PI. 5, figs. 1-6. — 



Mediterranean (Cavolini). 

 P. gibbosa Ag., Vol. III. PI. 15, figs. 1 and 2. — Florida (Agassiz). 

 Euphysa globator Leiiclc., Wiegm. Arch., 1856, PI. 2, fig. 4, is 

 probably a Pennaria. 

 Globiceps Ai/res. — Eucoryne Leidy. Both names preoccupied. 



G. tiarella Ayres. — Eucoryne elegans Lcidjj. — Pennaria tiarella 

 McCr. — Massachusetts: Bmsard's Bay (Ayres); N. Jersey (Leidy); 

 Charleston, South Carolina (McCrady). 

 Zanclea Gegenb. — Microstoma Less, (preoccupied). 



Z. costata Gegenb., PI. 8, figs. 4-7. — Messina (Gegenbaur). 

 Z. ambigua Ag. — Microstoma ambiguum Less. — Waigiou (Lesson). 

 Z. gemmosa 3fc Cr., PI. 8, fig. 4. — Gemmaria 3Ic Cr. — Charleston, 

 South Carolina (McCrady). 

 9th Family. Bougainvillid.e LiltJc, Gegenb. — Hippocrenid^e McCr. 



Bougainvillia Less. — Hippocrene Mert. — Hydra: Eudendrium-like, 

 with short proboscis. — See p. 283. 

 B. macloviana Less. — Cyanea Bougainvillii Less., Coq. Zooph, PI. 14, 



fig. 3. — Falkland Jslands (Lesson). 

 B. Mertensii Ag. — Hippocrene Bougainvillei Br., PI. 20. — Behring 



Straits (Brandt) ; Gidf of Georgia (A. Agassiz). 

 B. superciliaris Ag., Mem. Am. Ac, IV. PI. 1 ; see also this volume, 

 p. 283. — Bay of Boston, JVahant (Agassiz). 

 Margelis Steenst. — Medusa: Bougainvillia Forb., Hippocrene McCr. — 

 Hydra : Eudendrium-like, with short proboscis. 

 M. principis Steenst. — Faroe Jsl. (Steenstrup). 

 M. carolinensis Ag. — Hippocrene carolinensis McCr., PI. 10, figs. 



8-10. — Charleston Harbor (McCrady); NausJton (A. Agassiz). 

 M. ramosa Ag. — Tuljularia ramosa Dalycll, and Medusa ocilia 

 Dalyell, PI. XI. — Bougainvillia britannica Forbes, Nak. Med., 

 PI. 12, fig. \.— Zetland Lslands (Forbes). 



^ McCrady refers also Willia and Cladonema laridiE by the mode of branching of the Hydroid, 



to tliis family, but the hydrre of Cladonema and and by the structure of the proboscidal tentacles, 



Eleutheria, which are closely allied, differ as much which are clavate, while the coronal tentacles are 



from those of the true Pennaridte, as their free simple. The Cladonemidie have only one kind of 



meduste. The Pennaridce difler from the Tubu- tentacles, arranged in worls, and they are clavate. 



