CIRRIPEDIA FROM THE PACIFIC COAST OF NORTH AMERICA. 



195 



Tin- maxilhe > lig. 1, <• i ha v.- a Btraighl anterior margin with irregular strong spines. 

 Tip' anterior cirri an- very -lion, less than hall a- long a- 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 ami three pairs of smaller ones on the posterior sides 'fig. 1. is. sixth joint of the exopodite 

 of the third cirrus i. though the development of spines varies on different parts of the same eirrus. 



The caudal appendage (fig. 1, hi 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 ]a.-t bearing a terminal tuft 

 of long spines. 



Type, no. 32417 U. S. National Museum, from Albatross station 4353, off Point Loma Light-House, 

 (ii!!! fat horns, 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 interest ingas show Lag that the young 

 an- more normally calcified than the adult stage, the calcification after an early age proceeding only along 

 certain lines indicating the longer axes of tin- valves. This young individual hat .> i apitulum 5.7 mm. 

 long. The valves of this specimen resemble those of ,s". insigne Hook more than do those of the adult 

 stage. 



*£\ 



Pig. i. Scalp* Hum larvait 



i. Mandible; B, 6th joint of the >f the :'.r>l cirms; c, maxilla; n. caudal appendage: 



F-, mandible of sj>ecimpn from station 4:tK2. 



A series from Albatross station 4382, south point .if ( ioronado I -land, in 656 fathoms type no. :;l' I is 

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

 length of capitulum. The scutal calcification is broader and Less deeply bifurcate below than in the 

 type specimen. Aseries from this lot showing the stages of growth is figured in plate vi i Eg. 3-6), all 

 of them being drawn to the same scale. 



The anterior cirri have 6 and 10 joints. The other cirri are like those in the t; ovale. The 



caudal appendage has 5 joints, but otherwise is as figured for n. larvale. The mandibles < fig. 1. e i have 



three teeth and a spine at the lower end. 



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

 of the scuta. They are of the degenerate Ctypro-like form, without plates. Their hosts lack penes. 

 The species therefore belongs to Hock's third group (Challenger Report, vol. x, Girripedia, p. 21.) 



Scalpellum califomicum n. sp. 



(PI. vi. fig. 8, 13.] 



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

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

 very convex. The carina is simply arched, with convex rounded roof. The ehitinous interspaces 



