HAWAIIAN CIRRIPEDIA. 



Bv HEXRY A. PILSBRY, Sc. D. 

 Special Curator, Dcparliiiciil of .Mol/nsca, .hadoiiy of Xalural Saeitccs of I'hiladiipliia. 



In the course of dredccing ami trawliu;^ in Hawaiian waters during the sununer 

 of 1902, the steamer j1/6«</'o,'?.>? obtained a varied and interesting series of cirripedes, 

 wliich are deseri])ed in the following pages. Witli the exception of a single species 

 of Bulanus all the specimens were taken at depths of from 60 to 800 fathoms, most 

 of them from between 200 and 300 fathoms. 



The shore cirripedes of the islands are still jnactically unknown, oidy a few scat- 

 tered recoi-ds appearing in the monographs of Darwin and Gruvel. 



Cirripedes have a practical importance chiefly fi-oni the prolific growth of the 

 shore forms on all submarine objects, Balanus, ('onchoderma, and Lepas largely 

 composing the growths fouling sliips' bottoms, buo3's, etc. Since most forms do not 

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

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

 almost as profuse upon metal as upon wooden bottoms, and have even been found 

 on the screws of steam vessels. 



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

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

 coast, such as Balanus aquila, B. evermanni, and the large Balanus found near Port 

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

 fooil, if thev can be olitained in sufficient (|uantity. 



The deep-water cirripedes are very abundant in many places, but no tlata an; 

 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. 



Scalpellum hawaiense n. sp. 



(PI. IV. 11-. !-•_'. I 



A species of ilu- group ('' of Gruvcl'.s arranfffiucnt . ihi- 14 \alvi-.-i ln-iiig wholly calciliod. the- carina 

 regularly curved and a rostral plate present. There is no .fulicarina. The capinilum is o\at<-, tiu^ 

 anterior and jjosterior outlines about equally curved. The plates are co^•ered with a thin pale oli\e- 

 liuff cuticle, and are all sculptured with fine cords ridiating from the apices and more or less knotted or 

 beaded by the intersection of the lines of growth. 



Scuta with convex occludent and concave tergal margins, the lateral and basal inargius straight. 

 Tlie anterior and laleral faces of the plate are about <'qiud in area, and are si'|iara(ed l)y an arcuati' lUago- 

 nal angulation. Anteriorly the radial strialion is finer. 



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