754 THE VOYAGE OF H.M.S. CHALLENGER. 



1. Lithophyllium cruciatum, Haeckel. 



Acanthomctra cniciata, J. Miiller, 1858, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 49, Taf. xi^ 



fig. 11. 

 Xiphacanthu cruciatu, Haeckel, 1862, Monogr. d. EadioL, p. 385, Taf. xviii. fig. 13. 



Spines cylindrical, very thin, crossed perpendicularly in the distal third by a thin transverse 

 beam; both lateral rods of the cross have the same length as the distal end. Apex simple. 

 Base pyramidal, without leaf-cross. 



BimensioTis. — Length of the spines 0'05 to 0'15, breadth O'OOl to 0'002. 



Habitat. — Mediterranean, Atlantic, Stations 352 to 354, &c., surface. 



2. LitliopliylUum gladiatum, u. sp. (PI. 130, fig. 3). 



Spines compressed, sword-shaped, two-edged, crossed perpendicularly in the middle part by a 

 broad, somewhat curved transverse beam ; both lateral rods of the cross are triangular compressed, 

 and have the same length as the proximal end. Apex simple. Base pyramidal, without leaf-cross. 



Dimensions. — Length of the spines 0'2 to 0"25, breadth O'Ol. 



Habitat. — North Pacific, Station 241, surface. 



3. LitliophyUiuia condylatum, n. sp. 



Spines compressed quadrangular, tapering from the broader middle towards the two ends ; from 

 the middle part arise two ojipo.site perpendicular apophyses, which bear on the rounded end a 

 thickened condyle. Apex simple. Base pyramidal, with a small leaf-cross. 



Dimensions. — Length of the spines 01 to 012, breadth in the middle part 0"02. 



Habitat. — Central Pacific, Station 266 to 272, surface. 



4. Lithophyllium foliosum, J. Miiller. 



LithopJujUium foliosum, J. Miiller, 1858, Abhandl. d. k. Akad. d. "Wiss. Berlin, p. 52, 



Taf. xi. figs. 6-10. 

 J[iphacantha foliusa, Haeckel, 186::, Monogr. d. Radiol., p. 385. 



Spines lanceolate, tapering from the broader middle towards the two ends. From the middle part 

 or from the outer tliird arise two opposite triangular apopliyses, which are not perpendicidar to the 

 axis of the spine, but form an acute angle with its distal part. Therefore each spine represents 

 a broad leaf with a middle rib and with three lobes or truncated teeth. The distal apex is 

 distinguished by a violet colour. Base pyramidal, without leaf-cross. Central capsule yellow. 



Dimensions. — Length of the spines 0-05 to Ol, breadth 002 to 0'03. 



Habitat. — Mediterranean, French shore. Saint Tropez, J. Miiller. 



