552 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIy. 
the island of Kauai, and at Station 4101, in the channel between Maui 
and Molokai islands. 
The best hauls yielded five species each, one being at Station 3859, 
near Kauai, and the other being Station 3989, between Molokai and 
Maui. 
The richest alcyonarian fauna appears to be off the island of Kauai 
and in the channel between Molokai and Maui and its northeast ap- 
proach. There are doubtless other localities just as rich where the 
roughness of the bottom prevented successful hauls and a satisfactory 
exploration. It appears certain, from the quantity and variety of 
material secured, that the Hawatian region is one of the best locali- 
ties in the world for aleyonarian life. The fact that no species have 
heretofore been reported is doubtless due to the apparent lack of 
Aleyonaria in very shallow water. There would therefore be no like- 
lihood of these forms being collected by the natives or other shore 
collectors. 
There were only eight hauls where a depth of over 1,000 fathoms 
was reached, the deepest being at Station 4093, where a depth of 
1,572 fathoms was recorded, and a single specimen of Pleurogorgia 
militaris, new species, was secured. But two successful hauls from 
which aleyonarians were obtained, each yielding a single species, 
were made in less than 100 fathoms. 
SYSTEMATIC DISCUSSION OF HAWAIIAN ALCYONARIA. 
With the exceptions about to be noted, the writer has followed in 
general the classification of the Alcyonaria adopted by Wright and 
Studer in their report on the Alcyonaria of the Challenger expedi- 
tion.4 ; 
In the treatment of the Pennatulacea the writer has practically 
adopted the classification as revised by K6lliker in his report on the 
Challenger collections of this group.2 With the families Chrysogor- 
gidee and Primnoide the superb monographs on these groups by 
Versluys® have furnished the basis of the classification used. No 
better work has been done on the Aleyonaria than is embodied in 
these reports, and the present writer wishes here to acknowledge the 
very great assistance he has derived from the careful and masterly 
work of Versluys. The Chrysogorgidee appears to be an unusually 
difficult group to handle in a satisfactory manner, and the division of 
% Report on the Alcyonaria collected by H. M. S. Challenger during the years 
1873-1876. By Prof. EK. Percival Wright and Prof. Th. Studer, 1889. 
® Report on the Pennatulida dredged by H. M. S. Challenger during the years 
1873-1876, 1880. - 
© Die Gorgoniden der Siboga-Expedition. I. Die Chrysogorgiidae, von J. Ver- 
sluys, Privat-Docent an der Universitat Amsterdam. July. 1902. II. Die Prim- 
noidea. (Same publication and author) 1905. 
