CIRRIPEDIA FROM THE PACIFIC COAST OF NORTH AMERICA. 



195 



The niaxillBS (tig. 1, c) have a straight anterior margin with irregular strong spines. 



The anterior cirri are very short, less than half as long as the second pair; the rami have and 9 

 joints, respectively. The rest of the cirri are long, composed of long joints, which bear four pairs of spines 

 on the anterior and three pairs of smaller ones on the posterior sides (fig. 1, b, sixth joint of the exopodite 

 of the third cirrus), though the development of spines varies on different parts of the same cirrus. 



The caudal appendage I tig. 1, d) is very small, perhaps an eighth as long as the last ramus, composed 

 of four joints, the first one long (perhaps really composed of two joints), the last bearing a terminal tuft 

 of long spines. 



Type, no. 32417 L'. S. National Museum, from Albalross station 4353, off Point Loma Light-House, 

 639 fathoms, seated on a glassy spine or spicule. 



The shape of the scutal and of the inframedian plate is not like any of the known species, S. insigne 

 being apparently the nearest. 



A young individual in the same group, shown in the figure, is interesting as showing that the young 

 are more normally calcified than the adult stage, the calcification after an early age proceeding only al(jng 

 certain lines indicating the longer axes of the valves. This young individual has a capitulum 5.7 mm. 

 long. The valves of this specimen resemble those of S. itisignc Hoek more than tlo those of the adult 

 stage. 



KiG. 1. — Scnlpfllum larcalc 



1. M;iii<lible; B, 6th joint of the exopodite of the 3rd cir'-u.s; 

 E, mandible of specimen from station 4382. 



, maxilla; D, caudal aj)pendagc: 



A series from Albatross station 4382, south point of Coronado Island, in 65G fathoms ( tj-pe no. .".24U 

 U. S. National Museum), consists of smaller individuals, the largest three measuring about 10 mm. ii 

 length of capitulum. The scutal calcification is broader and less deeply bifurcate below than in lh( 

 type specimen. A series from this lot showing the stages of growth is figured in plate vi (fig. 3-6), ali 

 of them being drawn to the same scale. 



The anterior cirri have 6 and 10 joints. The other cirri are like those in tlie type of S. larralc. Tlte 

 caudal a|)pendage has 5 joints, but otherwise is as figured for .?. larralc. The niandil)les (fig. 4, e) have 

 three teeth and a spine at the lower end. 



Several complemental males were seated in the fold of the sack just inside the occludent borders 

 of the scuta. They are of the degenerate O/pn's-like form, without plates. Their hosts lack penes. 

 The species th(>refore belongs to Hoek's third group (Challenger Report, vol. x, Girripedia, p. 21.) 



Scalpelluni californicum n. sp. 



[PI. VI. fig. 8, 13.] 



The capitulum is composed of 14 normally calcified smooth valves, covered with a memliranc 

 which is shortly and delicately pilose. The occludent margin is nearly straight, the opposite margin 

 very convex. The carina is simply arched, with convex rounded roof, Tlie chitinous interspace: 



