Doubtfully distinct from the preceding species. 



CRANIA HAWADENSIS, new species. 



Lower valve pale buff, thin, more or less flexible, the shell sub- 

 stance somewhat radiately fibrous, the margins entire, not crenulated, 

 the inner surface of the disk smooth except for the reproduced 

 irregularities of the substratum, and the slight prominence of the 

 muscular scars; there is no indication of a septum. Breadth 8 mm. 

 length 8 mm. U. S. Nat. Mus. Cat. No. 335294. 



Type locality. — Near Bird Island, Hawaiian group, at United 

 States Bureau of Fisheries station 4158, in 20 to 50 fathoms, bottom 

 temperature 78° 6, collected by the United States Steamer Alhatross, 

 one lower valve adhering to a specimen of Peristernia crocea Gray. 



No species of Crania having been reported from the Hawaiian 

 group, this specimen has a peculiar interest. I should have felt 

 hardly justified in naming it from a single lower valve were it not that 

 it differs from all the described species in its elasticity and fibrous 

 texture and the almost entire absence of calcareous matter. A 

 microscopic scrutiny of a large series of Xenophora pallidula in the 

 hope of finding other individuals proved vain. It did reveal a 

 minute specimen of Discinisca about two mm. in diameter, with short 

 cirrhi, which, when an attempt to detach it was made, snapped into 

 space and could not be found. This genus is also new to the islands. 

 It came from station 4099, on the north coast of Maui in 152 fathoms, 

 temperatui:e 60° 7. 



CRANIA PHILIPPINENSIS, new species. 



Shell depressed, attached to a substratum by the whole sm-face of 

 the lower valve, whitish internally, reddish brown externally, the 

 apex of the upper valve prominent, the posterior margin straight, the 

 general outline rounded-quadrate; upper surface irregularly lamel- 

 lose, the lamellae not raised, but with small, threadlike, raised, 

 radiating, sparsely distributed lines continuous only on the single 

 lamella; interior of upper valve minutely granulose, with a margin 

 defined by a raised inner ridge, not radiately sculptured, the pedestals 

 of the adductors slightly raised, not coalescent medially, with a small 

 prominence in the middle line just below them; the anterior spaces 

 carry impressions of five or six brachial lobes on each side ; the space 

 behind the adductor ridges, with a central diamond-shaped depression 

 the two scars above it not elevated, evenly rounded; interior of 



