284 Scientific Intelligence. 
doubtless owing st the lack of gpa of G, suberosa Ellis. For the 
Gorgonia subero per, the new genus Sclerogorgia is established, 
satiichs as noted, appears to be the same as Suberogorgia Gray. ) 
G. patula Ellis and G. verriculata Esper are referred here, and a sub- 
family, Selerogorgiacea, is instituted for the grou 
The work is of peculiar value in systematic zoology because the author 
has had, for bite a and illustration, the original specimens of Esper, 
as well as of Duchassaing and other writers, thus restoring to ia science 
many species that have long been regar arded as doubtful, or altogether 
an gna by many recent authors, although very well described oa fig- 
ured 
a ofa and Ph ysiology of the Vorticellidian Toue (Bri 
a pediculus Ehr.) © Ue Hydra; by H. James -CLARK _Fro he 
“ 
the free Meduse of Hydra, of which the tek was announced in 
the Proceedings of the Boston Soc. of Natural Histor y, Nov. 1850, p. 
354. The investigations upon the structure of this species has an addi- 
tional interest on account of the views held by some authors that the 
Vorticeilide are closely allied to the Bryozoa. 
According to Prof. Clark, all previous figures of this species represent 
it in an abnormal or diseased state, “The peristome is not a closed circle 
as in Vorticellide ig ie but follows the spiral course of the vibratory 
crown, and vanishes near the aperture of the vestibule. The vibratory 
crown consists of a single row of vibrating cilia, which winds along the 
margin of the spiral, dexiotropic ait Sak just at the edge of the cupu- 
liform disk, and déscends thence to the left of the vestibular aperture, 
Neither Trichodina, nor any of the Vorticellida, a vestibu- 
lar lash or woes and ee mise is an optical illusion. terior 
truncate end of ined by a well-defined annular velum, 
immediately behind atic. 9 arising from t is, 18 i 
ete circle of vibrating cil * vestibule opens near and 
or e cilia-crowned margin of the sunken ae Bean disk. 
anus opens into the vestibule a short distance from its mout d 
lecti 
invaluable in staging the aie = our own coast. It is a mono- 
graph of the arctic Dorsibranchiate and Tubicolous Annelids, with nu- 
taacag synoptic tables of the genera, and detailed descriptions of all 
the species and genera, whether new or previously edi ree new 
