REPORT ON THE AMPIIIPODA. 1425 



p. 90, note, " Dans l'espece que j'ai examinee, il n'existait aucun vestige d'appendice 

 palpiforme insere aux mandibules ; mais dans la figure que M. Costa a donnee de ce 

 genre, on voit de cbaque c6te de la bouche un petit appendice sdtace qui paraitrait etre 

 un palpe mandibulaire, et qui est considere par ce naturaliste comme une seconde paire 

 d'antennes ; il serait possible que ces appendices ne fussent autre cbose que les pieces 

 terminales des pates-machoires devenues plus saillantes que d'ordinaire." Tbe small 

 appendages bere referred to are placed too bigh up in Costa's figure to admit of tbe 

 explanation offered by Milne-Edwards, but tbey are also too low down to admit of 

 Costa's own explanation ; they are perbaps the projecting tips of the first pair of 

 gnathopods. Spence Bate agrees with Milne-Edwards in giving " Mandibles without an 

 appendage," but he probably bases the statement only on the examination of a female 

 specimen. 



Phrosina semilunata, Risso (PI. CLXXVL). 



1822. Phrosina semilunata, Risso, Journal de Physique, de Chimie et d'Hist. Nat., t. xcv. 



p. 245. 

 1825. Phrosine semilunata, Desrnarest, Consid. gen. sur la Classe des Crustaces, p. 259. 



1825. Phrosina semilunata, Guerin, EncyeL Meth., t. x., Art. Uroptere. 



1826. „ „ Risso, Hist. Nat. de l'Europe Merid., t. v. p. 91, pi. iii. figs. 10-12. 



1829. Daetyloeera semilunata, Latreille, Le Regne Animal, t. iv. p. 117. 



1830. „ Nieetensis, Milne-Edwards, Ann. des Sci. Nat., t. xx. p. 393 (extr., p. 42). 



1831. ,, semilunata, Latreille, Cours d'Entomologie, p. 400. 



1838. „ Niceeensis, Milne-Edwards, Hist. Nat. des Anim. sans vertebres, t. v. 



1840. Phrosine semilunata, O. G. Costa and A. Costa, Catal. de' Crost. del Regno di Napolo. 

 18 — . „ „ Costa, Fauna Nap., tav. iv., fig. 1-5. 



1840. Daetyloeera nicoensis (in the index Niciensis), Lucas, Hist. Nat. des Crust., Arachn. et 



Myriap., p. 238. 

 184-. ,, Nicsensis, Milne-Edwards, Le Regne Animal, Illustrated Edition, pi. lviii. fig. 2. 



1840. Phrosina Nieetensis, Milne-Edwards, Hist. Nat. des Crust., t. iii. p. 91, pL xxx. fig. 21. 



1851. Phrosine semilunata, Costa, in Hope's Catalogo dei Crost. Italiani, p. 21. 

 1853. „ ,, Costa, Fauna del Regno di Napoli. 



1858-74. ,, Nieetensis, Chenu and Desrnarest, L'Encycl. d'Hist. Nat., Crustacds, p. 49. 

 1862. „ semilunata, Spence Bate, Brit. Mus. Catal. Amph. Crust., p. 319, pi. li. fig. 5. 

 1862. „ Nieetensis, Spence Bate, Brit. Mus. Catal. Amph. Crust., p. 320, pL li. fig. 6. 



1885. „ nieetensis, Carus, Prodromus Faunas Mediterraneag, pars ii. p. 422. 

 18S5. „ semilunata, Carus, Prodromus Faunae Mediterraneas, pars ii. p. 423. 



1886. „ Niceeensis, Gerstaecker, Bronn's Klassen und Ordnungen, Bd. v. Abth. ii. 



Taf. xxxiii. fig. 5. 



1887. „ seminulata [semilunata'], Bovallius, Systematical List of Amph. Hyper., Bihang 



till K. Svensk. Vetensk.-Akad. HandL, Bd. 11, No. 16, p. 27. 

 1887. „ Nieetensis, Bovallius, Systematical List of Amph. Hyper., Bihang till K. Svensk. 



Vetensk.-Akad. Handl., Bd. 11, No. 16, p. 28. 



The large head deeper than long, produced at the top of the front into two little 

 acute horns ; the first two segments of the peraeon coalesced ; the first segment of the 



(ZOOL. CHjiLL. EXP. PART LXTII. 1888.) Xxx 179 



