NOKTH AMERICAN ALCYONARIA. 



553 



only in the shape and arrangement of the scales as described 

 above, but also in the actual size of the larger zooids. 



I have compared them with the zooids of a specimen of 

 P. reseda from JSTorway, and found that, whereas the measure- 

 ments of spirit- specimens of P. ivilleyi are 5 mm. by 1'5 mm., 

 in dry specimens of P. reseda they are 7 mm. by 3 mm. In 

 P. pacifica the zooids are said to be 5-7 mm. in length, and from 

 the figure are evidently broader and stouter than in P. ivilleyi. 



Caligorgia fraseri, sp. n. (PL I. fig. 2 ; Text-fig. 4.) 



Gulf of Alaska, 50-100 fathoms. 

 Local name. " Verticillate fan-coral." 



This new species is repi-esented by two dried specimens 220 

 and 130 mm. in length i-espectively. The base of attachment is 



Text-fio-ure 4. 



c 





<5 < 



^r 



'r\ ^"'- 







'U 



J 



•■,^- 



Scales of Caligor-gia fraseri. X 280 diam. 



missing from both specimens, and consequently they may repre- 

 sent portions of a larger colony. The branches arise alternately, 

 but irregularly, from the main stem (or branch) in one plane. 

 The diameter of the largest stem, including the whorl, is 3*5 mm., 

 and of the axis 2 mm. 



