HAWAIIAN CIRRIPEDIA. 



By HENRY A. PILSBRY, Sc. D. 

 Special Curator, Department of Mollusca, . Icademy of Natural Sciences of Philadelphia. 



In the course of dredging and trawling in Hawaiian waters during the summer 

 of 1902, the steamer Albatross obtained a varied and interesting series of cirripedes, 

 which are described in the following pages. With the exception of a single species 

 of r><. hums all the specimens were taken at depths of from 60 to 800 fathoms, most 

 of them from between 200 and 800 fath s. 



The shore cirripedes of the islands are still practically unknown, only a few scat- 

 tered records appearing in the monographs of Darwin and Gruvel. 



Cirripedes have a practical importance chiefly from the prolific growth of the 

 shore forms on all submarine objects, Balanus, Conchoderma, and Lepas largely 

 composing the growths fouling ships' bottoms, buoys, etc. Since most forms donoi 

 penetrate wood, such growths are not permanently injurious, but are deleterious 

 mainly from the expense attending their removal from time to time. They are 



almost as profuse upon metal as upon w len bottoms, and have even been round 



on the screws of steam vessels. 



In some places the larger forms of Balanus are eaten, tin' flesh resembling that 

 of the lobster. There is good reason to believe that the larger species of the Pacific 

 coast, such as Balanus aguila, B.evermanni,a,nd the large Balanus found near Port 

 Townsend, Washington, would afford a valuable addition to our resources of sea 

 food, if they can be obtained in sufficient quantity. 



The deep-wrater cirripedes are very abundant in manj place-,, but no data are 

 available to show to what extent they are eaten by fishes. They probably form an 

 important item in the food supply of bottom-feeding forms. 



LEPADID i;. 



Scalpellum hawaiense n. sp. 



[PI. iv, Bg. I J. | 



A species of the group C of Gruvel'e arrangement, the 14 valves being wholly calcified, the carina 

 regularly curved and a rostral plate present. There is no subcarina. The capitulum is ovale, the 

 anterior an. I posterior outlines about equally curved. The plates an- covered with a thin pale olive- 

 l.i ill' cuticle, and are all sculptured with line cords radiating from the apices and more or less knotted or 

 beaded by the intersection of the lines of growth. 



Scuta with convex occludenf and concave tergal margins, the lateral ami basal margins straight. 

 The anterior ami lateral faces of the plate are about equal in area, and are separated by an arcuate diago- 

 nal angulation. Anteriorly (he radial striation is liner. 



1st 



