2 I 



Stat. 243. December 2. Lat. 4°3o'.2S., long. 129° 25' E. Hensen vertical net, from a depth 

 of 1000 m. to surface, i specimen. 



The specimen from .Stat. 230 is a female with brood; it measures 33 mm. in length. 



7. Eticopia major n. sp. PI. I, figs, jya — ^d. 



Stat. 35. March 28. Lat. 8°o'.3 S., long. 116° 59' E. 1310 m. Deep-sea trawl, i specimen 



(fragment). 

 Stat. 134. July 28. Lat. 2° 5o'.5 N., long. I26°53'.7E. 2291 m. Deep-sea trawl, did not reach 



the bottom, i specimen (type). 

 (Stat. 148. August. 10. Lat. o°i7'.6S., long. I29°I4'.5E. 1855 m. Hensen vertical net, from 



1000 m. depth to surface, i specimen, very young, probably belonging to this 



species). 



The type is a badly preserved female with marsupium ; it is 42 mm. long. The key to 

 the species gives all characters observed : the species is similar to E. unguictilata in- the relative 

 length and breadth of the terminal joint of the e.xopod of the uropods but differs sharply in the 

 direction and position of the cornea and in the curvature of the front margin of the carapace; 

 the differences between E. major and E. australis are seen in the key. 



B. Suborder MYSIDA. 

 This suborder comprises two families; both are represented in the collection. 



I. Family PETALOPHTHALMiDiE Czern. 



The family comprises 4 genera, viz. Pctalophthalimis Will.-Suhm, Hansenomysis Stebb., 

 Scolophthalmus Faxon, and Ceratomysis Faxon. Only the last-named genus is represented in 

 the "Siboea" material. 



•^to"- 



Ceratomysis Faxon. 



This most interesting genus was established by Faxon on a species, of which he had 

 but a single specimen. A closely allied species was secured by the "Siboga". 



8. Ceratomysis egregia n. sp. PI. I, figs. 5a — 5^; PI. II, figs. \a — \d. 



Stat. 45. April 6. Lat. 7°24'S., long. ii8°is'.2 E. 794 m. Bottom fine grey mud with some 

 radiolariae and diatoms. Deep-sea trawl, i specimen (adult cf ). 



Stat. 88. June 20. Lat. o°34'.6N., long. ii9°8'.5E. 1301m. Bottom fine, grey mud. Deep-sea 

 trawl. I specimen (immature 9)- 



Description. — The cephalothorax is somewhat shorter than the abdomen minus the 

 telson ; its two posterior segments are as usually in this family completely exposed (PI. I, fig. 5a;). 

 The carapace is armed with spines, in reality spiniform processes, nearly as in C. spinosa Faxon : 



