194: BULLETIN OF THE BUREAU OF FISHERIES. 



Scalpellum phantasma n. sp. 

 [PI. vi, fig. 1.] 



The capitulum is ovate, composed of 13 plates of which only a slender skeleton is calcified. There 

 is no membranous covering or pilosity. The calcified parts are white, the chitinous interspaces creamy 

 gray. The occludent margin is strongly and evenly arched in a single curve. 



The calcified port inn of the scutum consists of a band along the occludent margin, widening below. 

 where it is biramose, and a very narrow curved band along the tergal margin of the plate, diverging 

 V-like from the apex. The umbo is apical. 



The tergum is V-shaped, consisting of a wider band along the occludent margin and a narrower. 

 longer band near the carina] margin of the plate. 



The carina is simply arched, with subapical umbo. The roof is a rather narrow gutter between 

 two high, rounded marginal ribs. The sides are very narrow below, widening above, and spreading in 

 a rounded lobe above the umbo. 



The upper lateral plate is calcified in form of an unequally three-armed swastika, the shortest arm 

 is directed upward, the longest obliquely downward and toward the carina, the third arm runs toward 

 the inframedian lateral plate. The arms are slender, curved, and acute at the ends. 



There is no rostrum. The rostro-lateral plate is biramose, being calcified along the occludent margin, 

 with a slender arm ascending toward the upper lateral plate and a wider one along the basal margin. 



The infralateral plate has a median umbo, a slender ascending arm, a widening descending portion, 

 and a short arm reaching toward the carina. 



The carino-lateral plate is L-shaped, with the longer branch ascending near the carina and the 

 shorter along the basal margin. The umbo projects below the base of the carina. 



The peduncle is cylindrical, protected by wide, short scales, not in the least imbricating. !) or 10 in 

 any of the S longitudinal rows. 



Length of the capitulum 28 mm., breadth 15 mm., diameter 7 mm. Length of the carina 23 mm. 

 Length of the peduncle 8. 5 mm, diameter in the middle 5.5 mm. 



Type, no. 32421 U. S. National Museum, from Albatross station 4397, off Santa Catalina Island-. 33 

 10' 15" N., 121° 42' 15" W., 2,196 fathoms, gray mud. A single specimen. 



This peculiar species is perhaps the tinest of the "incompletely calcified" forms. It is related by 

 the shape of the carina to 5. gruvelianum . Among the imperfectly calcified forms it is most related to 

 .9. marginatum Hock, from north of New Guinea, but differs from that in the shape of the upper lateral 

 plate, the regular arch of the occludent margin, and other characters. It was taken at a greater depth 

 than other Califomian cirripedes. 



Scalpellum larvale, n. sp. 



[PI. vi, fig. 2-6.] 



Capitulum oblong, the occludent and carinal outlines about equally convex, composed of 13 valves 

 which are but partially calcified. Rostrum wanting. Surface not hairy. Umbo of the carina apical. 



The calcified part of the scutum is shaped like an inverted letter Y, the umbo being apical, 

 minute and acute, and extending noticeably over the tergum. 



The calcified portion of the tergum is in the form of an inverted V, with the addition of a small ledge 

 on the carinal side of the apex. The carinal limb of the V is much longer than the occludent. 



The carina is much better calcified than the other plates. It is very long, extending about three- 

 fourths the length of the tergum, simply arched, the curvature being greater above. The roof is flat, 

 passing rectangularly into the narrow sides. 



The upper lateral plate is narrow, somewhat boomerang-shaped. The rostro-lateral plate is narrow, 

 transverse, with parallel upper and basal margins. The inframedian lateral plate is arrowhead-shaped, 

 acute above, biramose below, small. The carino-lateral plate is calcified in form of an inverted T and 

 is much smaller than the upper lateral plate. 



The peduncle is very short , rather sparsely protected by very wide, short scales. It widens slowly 

 from the base to the capitulum. 



Length of the capitulum 13.3 mm., width 7 mm., diameter 3 mm. Length of the carina 11 mm. 

 Length of the peduncle 5 mm., diameter in the middle 2.3 mm. 



The mandibles i Eg. I, a) have 4 strong acute teeth and a lower point at the inferior angle. 



