SCRUPARIA. 21 



shorter and more numerous than in the other^ which is 

 very flaccid, pale, and with the terminal branches much 

 attenuated/' 



G. Willisii, Dawson, from the coasts of Nova Scotia, 

 whicli is said to differ from G. loricata " in its narrower 

 and less-inflated cells and longer apertures, and in its 

 more dense habit of growth,^^ seems to me to present 

 only the characters of a variety. 



This species has suffered many things at the hands of 

 systematists ; and the formidable list of synonyms given 

 above affords a striking illustration of the injury done to 

 zoological science by the unnecessary creation of names. 



Genus SCRUPARIA, Hincks. 



ScKUPARiA (part.), Hiucks, Quart. Jouru. Micr. Sc. v. (1857). 



Generic Character. — Zoarium erect, branches given 

 off from the back of a cell, and facing in the opposite di- 

 rection. ZocECiA subcalcareous, 7'ising one from the other, 

 so as to form a single series, or jil^ced back to back. Aper- 

 ture small, unarmed, slightly oblique, terminal. Ovicelli- 

 GEROus CELLS snuill and imperfecthj developed, placed back 

 to back with the ordinary cells. Ocecia terminal. No 



AVICULARIA or VIBRACULA. 



This genus is founded for Scruparia clavata, mihi. Fur- 

 ther examination has convinced me that its peculiarities 

 are such as to separate it from the well-known Eucratea 

 chelata, with which I had previously associated it. 



I have adopted for the present genus Oken's name Scru- 

 paria, which would otherwise lapse altogether. No prac- 

 tical inconvenience, I believe, is likely to result from its 

 retention with a new definition. 



In 1858 Dyster established the genus Huxleya for a 



