1216 . THE VOYAGE OF H.M.S. CHALLENGER. 



6. Lampromitiu schultzei, Haeckel. 



Eucearyphalus sehultzei, Haeckel, 1862, Monogr. d. Kadiol., p. 309, Taf. v. figs. 16-19. 



Shell flat, conical, smooth, with slight collar stricture. Length of the two joints = 1:3, breadth 

 = 1:8. Cephalis hemispherical, with a small conical horn of half the length, and very small 

 roundish pores. Thorax with three strong, straight ribs and irregular polygonal pores, which are 

 much larger in the middle part than in the upper or lower part. Peristome with a double 

 coronal of short, conical, divergent spines; the superior obliquely ascending, the inferior vertically 

 descending. (Named in honour of the late Professor Max Schultze, the illustrious histologist.) 



Dimensions. — Cephalis 0'025 diameter; thorax 0"07 long, 0'2 broad. 



Hahitat. — Mediterranean, Messina, surface. 



7. Lampromitra arboresce?is, n. sp, (PL 60, fig. 8, 8a). 



Shell flat, pyramidal, spiny, with sharp collar stricture. Length of the two joints = 1:3, 

 breadth = 2 : 10. Cephalis cap-shaped, with an oblique, slender, conical horn of twice the length, 

 and small circular pores. Thorax with three slight almost obliterated ribs and three vaulted sides 

 between them, with irregular roundish pores. The three ribs are distinct in the proximal, not in the 

 distal part. Peristome with a double coronal of smaller squarish pores and numerous divergent 

 spines ; the larger spines are irregularly branched and as long as the diameter of the cephalis. 



Dimensions. — Cephalis 0'15 long, 0-03 broad ; thorax 0'04 long, 0-2 broad. 



Hahitat.— Imlian Ocean, Madagascar (Eabbe), surface. 



8. Lampromitra dendrocorona, n. sp. (PI. 58, fig. 9). 



Shell flat, conical, with smooth surface and deep collar stricture. Length of the two joints 

 = 1:4, breadth = 2 : 10. Cephalis hemispherical, with a slender occipital horn of three times the 

 length, and a small divergent frontal horn. Thorax with three strong, prominent, straight ribs and 

 irregular polygonal meshes, increasing in size towards the mouth. Peristome with a dense coronal of 

 numerous short conical spines and twenty-four to thirty larger arborescent spines, longer than the 

 diameter of the cephalis. 



Dimensions. — Cephalis 0'02 long, 0"04 broad; thorax 0'08 long, 0'2 broad. 



Hahitat. — Central Pacific, Station 272, depth 2600 fathoms. 



Genus 543. Callimitra} Haeckel, Prodromus, 1881, p. 431. 



Definition. — S e t h o p i 1 i d a (vel Dicyrtida triradiata aperta) with three vertical 

 latticed wings, which stretch between the three divergent lateral ribs of the thorax and 

 the vertical horn of the cephalis. No frontal horn. 



1 CaMtmitra = Beautiful turban ; koKkI;, ^iVja. 



