106 
#: He sub-divides the family into three subfamilies, Acanthe- 
phyrinae, Notostominae (Tropiocaridae, Bate), and Nemato- 
carcininae. Faxon in 1895 retains the family Nematocar- 
cinidae as distinct. 
Gen. Acanthephyra, A. Milne-Edwards. 
1881. Acanthephyra, A. Milne-Edwards, Ann. Sci. Nat., Zool., 
Ser. 6, Vol. SUL Art. 45)p..n2: 
1882. Miersia, S. I. Smith, Bull. Mus. Comp. Zoél. Harvard, 
Vol. X., p. 66. 
1884. Acanthephyra, S. 1. Smith, Rep. U.S. Fish. Comm, p. 372. 
1895. Acanthephyra, Faxon, Mem. Mus. Comp. Zodl., Harvard, 
Vols X VIDE; p: 160. 
rgor. Acanthephyra, Alcock, Catal. Indian Macrura, p. 75. 
Other references can be found in Faxon’s work or under the 
citations already given for the family. As already pointed out, 
Kingsley’s Miersia is of earlier date than Acanthephyra, but 
there is no certainty that it represents the same genus. In 
1816 Risso described a species as Alpheus pelagicus, which in 
1826 he transferred to Pandalus. Of this species he says, at the 
latter date, “Son corselet est alongé, orné sur les cotés d’une 
suture courbe, avec quatre aiguillons et un rostre cannelé,” etc. 
His original description ran :—“‘Son corcelet est alonge, 
traversé par une suture courbe sur les cOtés, et terminé sur le 
devant par quatre aiguillons, avec un rostre canelé,” etc. His 
later figure shows a longitudinal row of four denticles on the 
side of the carapace, of which there is no trace in his earlier 
figure. Also his earlier description seems to imply that it is 
the front margin of the carapace which carries the teeth. In 
that case they might be the antennal and branchiostegal teeth 
which are so placed in Acanthephyra. 
Milne-Edwards (Hist. Nat. Crust., Vol. II., p. 422, 1837), 
says :—‘‘ M. Roux nous apprend que ses Ephyres ont le corps 
comprimé latéralement, la carapace lisse, Vabdomen caréné et 
le rostre denté; les pates-machoires sont tres-alongées et les 
pates thoraciques portent a leur base un appendice palpiforme, 
mais ne paraissent pas avoir de point comme dans le genre 
suivant ; les pates des deux premicres paires sont petites, plus 
courtes que les suivantes, et didactyles ; enfin les carpes sont 
simples.” ‘The following genus” referred to is Milne- 
Edwards’ own new genus Oplophorus, the description of which 
