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



10. Amphilonche lancetta, n. sp. 



Two principal spines compressed, lanceolate, two edged, gradually tapering from the broader middle 

 towards the two ends ; apex simple ; base of double the breadth, with a large leaf -cross. Eighteen 

 smaller spines of the same form, but shorter and only half as broad. Central capsule lentelliptical, 

 pellucid. 



Dimensions. Length of the two major spines 0'2 to 0'3, breadth in the middle part 0'02 to 

 0'03 ; length of the eighteen smaller spines 01 to 0'2. 



Habitat. South Pacific, Station 288, surface. 



11. Amphilonche complanata, Haeckel. 



Amphilonche complanata, Haeckel, 1862, Monogr. d. Radio!., p. 390, Taf. xvi. fig. 3, Taf. xviii. 



fig. 18, a, b. 

 Acanthometra complanafa,~H.aeckel, 1860, Monatsber. d. k. preuss. Akatl. d. Wiss. Berlin, p. 808. 



Two principal spines compressed, two-edged, linear, of equal breadth throughout their whole 

 length ; apex emarginate or bifid ; base with a large leaf-cross of double the breadth. Eighteen 

 smaller spines of the same form, but only one-fourth to one-half as large. Central capsule ellipsoidal, 

 yellow, pellucid. 



Dimensions. Length of the two major spines 0'15 to 0'25, breadth 0'004 to O'OOG ; length of 

 the eighteen minor spines 0'05 to O'l. 



Habitat. Mediterranean (Messina), surface. 



12. Amphilonche messanensis, Haeckel. 



Amphilonche messanensis, Haeckel, 1862, Monogr. d. Radio!, p. 391, Taf. xvi. fig. 4, Taf. xviii. 



fig. 19. 

 Acanthometra messanensis, Haeckel, 1860, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, p. 808. 



Two principal spines quadrangular prismatic, often a little compressed from two sides, of nearly 

 equal breadth throughout their whole length ; apex either truncate or emarginate, with two opposite 

 teeth ; base with a large leaf-cross of double the breadth. Eighteen smaller spines of similar form 

 or more compressed, much shorter. Central capsule spherical or ellipsoidal, yellow, transparent. 



Dimensions. Length of the two major spines 0'12 to - 18, breadth O016; length of the minor 

 spines 0'5 to 0'09. 



Habitat. Mediterranean (Messina, Corfu), Haeckel, surface. 



13. Amphilonche hydrotomica, n. sp. (PL 132, fig. 2). 



Two principal spines quadrangular prismatic, with four broad prominent lamellar edges or 

 wings, of equal breadth throughout their whole length ; apex pyramidal ; base with a large leaf-cross. 

 Eighteen smaller spines cylindrical or bristle-shaped, only half as long and very thin. Central 

 capsule cylindrical or spindle-shaped, very long, opaque. 



