HAWAIIAN CIRRIPEDIA. 



183 



Length of capitulum, specimen from station 3824, 12.5 mm., width 6 mm.; length of peduncle 



2 mm. 



Type n<>. 32419. V. S. National Museum, from Albatross station 3907, south coasl of Oahu, 315 

 fathoms, on tin- spine of a cidaroid sea-urchin, with PacUasma; bottom fine white sand ami mud. 

 Specimens also from station 3S24. south coasl of Molokai, 222 to 498 fathoms, on Hyalonema; bottom of 



coral rock and broken shell. 



'['his species is rnore closely related to S. auitraKewm Hoek«, than to any other known form. It 

 differs from that in the sculpture of the valves, each having a stronger diagonal ridge, and in the shape 

 of the plates of the basal whorl, especially the rostral latent, which in the Challenger species are as high 

 as wide. Tlie inframedian and carinal latera also differ in several respects, and the umbo of the upper 

 lateral plate does not imbricate over the scutum as it does in S. australicum. Scalpellum hirsutum, 

 s I, nut , etc., are also allied species, but are clearly distinct by various characters. 



Trilasmis eburneum Hinds. 



Trttasmis eburnea Hinds, Voyage of the Sulphur, vol. t. Uollusca, 



p 72, ft .'I. tig. 5, 1844. 

 Pee* Uasma eburnea Darwin, Monograph en Cirript dla, p. 112, pi. 

 2, fig. 5, 1851. Gruvel, tfonogr. des Clrrhipedes, p. 120, Hl- i 19 

 (copifil front Darwin), 1905. 



Albatross station 3845, south coasl of Molokai in 

 60 to 64 fathoms, on spines of a I 'idaris [ike sea-urchin. 



This rare species has been known hitherto on];, 

 from specimens taken sixty years ago by the Sulphur 

 on the coaefoi New Guinea. They occurred on the 

 spines of an "Echinus." The Hawaiian specimens 

 differ from them in being a little larger, the capitu- 

 lum 3.4 mm. long, anil slightly unlike in the shape 

 of lie- carina, the upper part of which is more attenuated, whil 



this variation is probably of no great importance, 1 have deem 

 of a Hawaiian individual. 



Fig. 1. 



'> eburneum. Scutum and two views 



..( carina. 



tin' basal cup is more flattened. While 

 d it well to figure the scutum and carina 



Poecilasma k£empferi Darwin. 

 r<i< ilnsimt ksempferi Darwin, Monogr. Lepadidffi, p. 102. 



Albatross station 3984, between Honolulu and Kauai. Hi I to 237 fathoms. Slat ion 3839, south coasl 

 ni Molokai, 259 to 266 fathoms. Station 3884, Pailolo Channel, 284 to 290 fathoms. Station 4117, north- 

 west coasi of Oahu, 282 fathoms. On the crab Cyrtomaia smithi Rathbun. Also stations 3811, south 

 coast Oahu, 338 fathoms, and 4045, west coast Hawaii, 198 fathoms, mi Lambrus I Platylambrus) stellatus 

 Rathbun. 



The species was originally described from Japan, attached to the crab Inachus kxmpferi !>'• Baan. 

 li is new to the Hawaiian fauna. A very similar form, /'. auranlia Darwin, occurs al Madeira, and by 

 some authors has been considered to form merely a variety of the Japanese /'. Jcxmpfi < 



If Poecilasma is to be allowed to stand distinct from Trilasmis, it will be for species of the ty] f 



/'. ksempferi, mosl of which are cancericoles 



Poecilasma bellum, n. 

 [PI. iv, fig. 6.] 



SP- 



The capitulum is elliptical, acute al both ends, and composed of live wholly calcified valves in 

 close contact. White or flesh-tinted bj the a iscera showing through. The occludenl and carino-tergal 

 outlines are equally convex. The margins of the peduncle foramen flare laterally. 



The scutum is very large, convex, ils surface divided by a prominent angle passing in a curve 

 from the beaks to the angle at the junction of carina and terga. The basal and occludenl margins 

 form a single symmetrical curve, the basal making no angle with the occludenl. The carinal margin 



a Challenger Report, vol. vin, Cirripedia, p. 118, pl.v, fig. 11. 



