1486 THE VOYAGE OF H.M.S. CHALLENGER. 



Dimensions. — Length of the shell (with eight joints) Olo ; length of each joint 0-017 to 0-023, 

 breadth 0-04 to 0-05. 



Hahitat. — Fossil in Tertiary rocks of Sicily ; Grotte (Stohr), Caltanisetta (Haeckel). 



9. Lithomitra punctata, Haeckel. 



LdtJiocampe punctata, Ehrenberg, 1844, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, 



p. 84. 

 Eucyrtidium pundatum, Ehrenberg, 1854, Mikrogeol., Taf. xxii. fig. 24. 

 Dietyomitra punctata, Stohr, 1880, Palseontogr., vol. xxvi. p. 101, Taf. iii. fig. 24. 



Shell subcylindrical, smooth, with four to six distinct strictures. Cephahs small, subspherical. 

 Thorax carapanulate-conical. Abdomen cylindrical, with three to four equal joints. In each joint 

 live to six transverse rows of small, circular pores, qiuncuucially disposed. 



Dimensions. — Length of the shell (with five joints) 0-1 ; length of each joint (except the first) 

 0-02, breadth 0-05. 



Habitat. — Fossil in Tertiary rocks of Sicily ; Caltanisetta (Ehrenberg), Grotte (Stohr). 



10. Lithomitra seriolata, T{^eck.Q\. 



Eucyrtidium seriolafiim, Ehrenberg, 1858, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, 



p. 33. 

 Llthocampe seriolata, Haeckel, Monogr. d. Eadiol., p. 316. 



Shell subcylindrical, smooth, with four to six sharp strictures. Cephalis small, hemispherical. 

 Thorax conical. Abdomen cylindrical, with three to five different joints of alternate sizes. Small 

 circular pores in transverse rows ; three or four rows in the third and fifth joints, seven or eight 

 rows in the second, fourth, and sixth joints. 



Dimensions. — Length of the shell (with six joints) O'l ; length of the second and fourth joints 

 0-03, of the third and fifth joints 0-015. 



Habitat. — Mediterranean, Crete (Ehrenberg), Corfu (Haeckel). 



11. Lithomitra hyperborea, Haeckel. 



Eucyrtidium liyperioreum, Bailey, 1856, Amer. Journ. Sol. and Arts, vol. xxii., pi. i. fig. 10. 

 Lithocampe hyperborea, Haeckel, 1862, Monogr. d. Radiol., p. 315. 



Shell cylindrical, with prominent longitudinal ribs and six deep strictures. Cephalis hemi- 

 spherical. On each joint three to four transverse rows of small, obsolete pores. Each joint is 

 about twice as broad as long. 



Dimensions. — Length of the sheU (with six joints) 0-12 ; length of each joint 0-02, breadth 0-04 



Habitat. — Arctic and Northern Pacific, Kamtschatka (Bailey). 



