57 



The specimen from Stat. 45 measures only -]-] mm., rostrum 14 mm., carapace 15Y2 mm., 

 abdomen 47^3 mm., the rostrum which just reaches beyond the antennal scales and which is still 

 a little shorter than the carapace, is armed above with 7, below with 3 teeth; the 3^'' tooth 

 of the upper border stands above the orbital margin, the 6'^ reaches just beyond i^' antennular 

 article, while the 7'^ stands immediately before the i^' of the lower margin; the three teeth of 

 the latter are placed on the middle third and the apex of the 2"'^, which is slightly larger than 

 the 1^' or the 3''<i, is but little farther distant from that of the 3"' as from the i^'. 



The rostrum of the specimen from Stat. 175 is broken off in the middle, but there are 

 6 teeth on the upper border, that gradually increase in length and of which the 3'''' is placed 

 above the orbital margin. The three young specimens from Stat. 178 are the youngest of all. 

 In the first, long 50 mm., the rostrum (6'/^ mm.) reaches to the last third of the antennal 

 scale and is distinctly shorter than the carapace; the 6 teeth of the upper border reach to the 

 distal end of i^' antennular article, the 3"^ is situated above the orbital margin and the three 

 following are of equal size; the 3 teeth of the lower margin are placed on the middle third. 

 In the youngest individual, in which the abdomen is wanting, the rostrum (4'/3 mm.) is about 

 half as long as the carapace (8^3 mm.) and reaches to the middle of the antennal scale; it 

 •e.Ktends straight forward, though slightly turned upward and is i-dentate; the teeth of the 

 upper border are nearly equal, the foremost tooth is placed above the distal end of 1^' antennular 

 article, immediately behind the i*' of the three teeth oi the lower margin, of which the 3'^'* is 

 but little farther distant from the 2^^ as the 2"<^ from the i*' and a little farther distant from 

 the ape.x of the rostrum than from the i'*' tooth. Of the third specimen, which is the largest 

 of the three, the rostrum is broken. 



General distribution: Arabian Sea (Alcock); Bay of Bengal (Alcock); Andaman 

 Sea (Alcock) ; Siberut Island (B.\lss) ; South of the Philippine Islands (Spence B.vfe) ; Japan 

 (Spence Bate, B.a.lss) ; Banda Island (Spence B.\te) ; Kermadec Islands (Spence B.vte) ; North of 

 the Falkland Islands (Spence B.a.te). 



2. Acanthep/iyra purpurea A. M.-Edw. PI. VI, Fig. 12 — \2C. 



Acanthephyra purpurea A. Milne-Edwards, Compt. Rend. Acad. Sciences Paris, T. XCIII, 



1881, p. 935. 

 Acanthepliyra purpurea Stanley W. Kemp, "Fisheries, Ireland, Sci. Invest.", 1905, I. [1906I, p. 4, 



Plates I and II, F"ig. i — 3 (Synonymy). 

 Acanthephyra purpurea H. J. Hansen, The Danish Ingolf-Expedition, Vol. III. 2. Crustatea 



Malacostraca. I. Copenhagen, 1908, p. 75. 

 Acanthephyra purpurea Stanley W. Kemp, "Fisheries, Ireland, Sci. Invest.", 1908, I. [1910], 



p. 56—58 and in: Transact. Linnean Soc. London. 2nd Ser., Zoology, Vol. XVI, Pt. i, 



1913, p. 64. 

 Acanthephyra purpurea K. Stephensen, Vidensk. Meddel. fra den Naturh. Foren. Vol. 64, 



19 1 2, p. 64 and 329. 

 Acanthephyra purpurea O. Pesta, Zoologischer Anzeiger, Vol. XLII, 191 3, p. 70. 

 Acanthepliyra purpurea H. Lenz and K. Strunck, Deutsche Sudpolar-Expedition 1901 — 1903, 



Vol. XV. Zoologie VII, Berlin 1914, p. 326. 

 Acanthephyra parva H. Coutiere, Bull. Musee Oceanogr. de Monaco, 1905, p. 15, Fig. 5. 

 Acanthepliyra purpureus Th. R. R. Stebbing, South African Crustacea, Part VIII, London, 



191 5 (Annals South African Museum, XV, Part II, 1915), p. 96. 



SIBOGA-EXPEDIT[E X.XXI.\<j3. 8 



