64 PERCY SLADEN TRUST EXPEDITION 
Oct. 16, 1905. 3 miles N.W. of Desroches Atoll. kk. 250 to 0 fms.; one young, 
27 mm. 
I am unable to find any valid distinction between this small specimen and larger 
examples of H. gracilirostris determined by Alcock. The rostrum is of great length, one 
and a half times that of the carapace, and the spine on the third abdominal somite is of 
enormous size, reaching as far as the posterior edge of the fifth somite and completely 
overshadowing that of the fourth somite which has the same proportions as in the adult. 
These characters, in my opinion, are correlated with post-larval growth and do not afford 
specific distinctions. 
The rostrum bears ten small teeth above and eight below, and there are twelve 
spinules on the outer margin of the antennal scale. The carinze of the carapace and the 
spines on its antero-lateral and postero-lateral edges are closely similar to those of adult 
examples. 
11. Hoplophorus foliaceus, Rathbun. 
Oplophorus foliaceus, Rathbun, Bull. U. 8. Fish Commission for 1903 (1906), xxiii, pt. 11., p. 922, 
text-figs. a, ), 
Sept. 27, 1905. 8. by E. of Farquhar; 10° 27’S., 51°17’ E. p. 500 to 0 fms.; one 
young, ca. 25 mm. 
In this young example the apex of the rostrum is broken off. Except that the third 
pareeopods are proportionately somewhat shorter it agrees exactly with Miss Rathbun’s 
account. The long spines on either side of the finely crenulated apex of the telson 
appear a little shorter than in Miss Rathbun’s figure. 
The spine on the second abdominal segment—a feature which at once distinguishes 
this species from all other members of the genus—is very strongly developed ; its apex 
reaches beyond the middle of the fourth somite. The spine on the third somite reaches 
the posterior margin of the fourth, while that on the latter somite is about half its length. 
The branchiostegal spine is prominent, but does not form the termination of a carina as 
in H. gracilirostris, and the lateral carinze of the rostrum posteriorly curve downwards 
behind the orbit and are not continued backwards on either side of the median crest as in 
that species. The two posterior rostral teeth are situated on the carapace behind the 
longitude of the orbital notch. 
Hoplophorus foliaceus was described by Miss Rathbun from specimens obtained in 
337 and 442 fathoms in the vicinity of the Hawaiian Islands. 
AcANTHEPHYRA, A. Milne Edwards. 
12. Acanthephyra purpurea, A. Milne Edwards, 
Acanthephyra purpurea, Kemp, Fisheries, Ireland, Sci. Invest. for 1905, p. 4 (synonymy) and Coutiére, 
Bull. Mus. Océanog. Monaco, no. 70, 1906, p. 12. 
May 17, 1905. N. of Chagos Archipelago, 4° 16’S., 71° 53’ E. ©, 1200 to 0 fms. ; 
one male, three females, 52—72 mm. 
Sept. 27, 1905. S. by E. of Farquhar, 10° 27’S., 51°17’ E. q, 1000 to 0 fms.; one 
male, one female, 66 and 69 mm., and one damaged post-larval example. 
