55 



the east coast of the United States in such shallow water as 105 fathoms, but which north-west 

 of Bermuda was taken at 2675 and off the east coast of the United States even at 2949 

 fathoms, this depth being the greatest recorded for this genus. In most of these cases, however, 

 as Stanley Kemp suggests in his paper of 1906, the specimens may have been caught while 

 the trawl was being hauled to the surface. Many species occur probably in a vast region 

 intermediate between the surface and the bottom and may sometimes approach the surface, as 

 e. g. the already mentioned Acanth. purpurea, of which a specimen has once been captured 

 alive at 10,45 P- "i- at the surface, a fact recorded by S. I. Smith (in: Annual Report of the 

 Commissioner of Fish and Fisheries for 1885. Wash. 1886, p. 63). Other species, however, 

 with less developed, smaller eyes, like Acanth. microphthalma S. I. Smith and Acanth. brevi- 

 rostris S. I. Smith, are on the contrary constantly found in much deeper water and probably 

 never reach the surface. 



I. Acanthephyra c.ximea S. I. Smith, var. brachytelsonis Bate. 



Acanthcpliyra brachytelsonis Q. Spence Bate, Challenger Crust. Macrura, i888, p. 753, PI. CXXVI, 



fig- 7- 

 Acanthepliyra brachytelsonis J. Wood-Mason and A. Alcock, in: Annals Mag. Nat. Hist. Sixth 



Series, Vol. 9, May 1892, p. 362. 

 Acanthephyra eximia var. brachytelsonis A. Alcock, Catal. Indian Deep-Sea Crustacea, Calcutta, 



1901, p. 78. 

 Acanthephyra brachytelsonis Th. R. R. Stebbing, South African Crustacea, Part VIII, London, 



191 5, p. 97 (in: Annals South African Museum, XV, Part II, 191 5). 

 Illustrations of the Zoology of the Investigator, PI. Ill, fig. 2. 



Stat. 45. April 6. 7°24S., ii8°i5'.2E. 794 m. Bottom fine grey mud, with some radioiariae 



and diatomes. i young specimen. 

 Stat. 173. August 28. 3°27'.oS., i3i°o'.5 E. Oft" the east coast of Ceram. 567 m. Bottom fine, 



yellow grey mUd. 2 young specimens. 

 Stat. 175. August 30. 2°37'.7S., I30°33'.4E. Ceram Sea. 1914 m. Bottom fine, grey and 



green mud. i young male (the carapace with appendages only). 

 Stat. 178. Sept. 2. 2°4o'S., 128° 37'. 5 E. Ceram Sea. 835 m. Bottom blue mud. 2 almost adult 



males and 3 very young specimens. 

 Stat. 284. January 18, igoo. 8°43'.iS., i27°i6'.7E. Timor Sea. 828 m. Bottom grey mud. 



I fully developed specimen. 



The adult specimen from Stat. 284, which seems to be a female without eggs, because 

 there is but one stylet at the base of the endopod of the 2"'' pleopods, is 153 mm. long, still 

 II mm. longer than the largest specimen recorded (Alcock, I.e. 1901): the rostrum, measured 

 obliquely from the orbital margin to the apex, proves to be 24 mm. long, the carapace 39 mm., 

 the abdomen 90 mm. The upper border of the rostrum that reaches to the terminal s"* part of 

 the antennal scales, is at first slightly directed downward as far as the distal extremity of the 

 antennular peduncle and from this point is obliquely directed upward. There are 5 low teeth 

 at the proximal end of the upper margin, of which the first two are placed on the carapace, 

 the third above the orbital margin and two in front of it; these teeth gradually increase in 

 length from the posterior to the anterior. Of the 3 teeth of the lower margin the i*' stands 

 immediately in front of the middle and just in front of the anterior tooth of the upper margin. 



