OXYCEPHALUS. 



55 



1830 Oj-i/cepltaliis pispctforis, H. Mitae Edwards, 

 1836 O. occnnicus, F. G. Gukrix-Mén'kviu.e, 

 1810 O. ar mat IIS, H. Milne Edwakds, 



» (). piscator, » 



1802 O. tiiberciilntiis, C. Spence Batk, 



Î O. ocean us, (Gueiun) C. Spence Bate, 

 1871 0. fci/iiirostris, C. Claus, 



1878 0. tiilicrciilatiis, (Sp. Bate) Th. Streets, 

 » 0. hiilùosiis, Til. Streets, 



» 0. sclcrotieits, » 



1879 0. piscator, (M. Edw.) C. Glaus, 

 s 0. sliiiilis, C. Claus, 



» 0. latirostris, » 



» 0. jjorcelliis, » 



» (). Iniiglccps, » 



» 0. ti/phoides, » 

 1884 0. Edaardsii, Geo. Thomson, 

 1887 0. Cluiisi, C. BovALLius, 



» 0. pectinatus, » 



» 0. pirjiw/'des, » 



» 0. Stecntrnpi, » 



1832 Or/o onii(liora»ipJnis, A. Cocco, 

 1850 Ondthorainphus Coccoi, G. Natale, 

 1864 Natnlins caiididissimus, A. Costa, 



Oxyccpliiiliis piscator. 

 Oxycephalus piscator. 

 Xiphocephalu.s arm a t us. 

 Oxycephalus piscator. 

 Oxycephalus t u b e r c u 1 a t u s . 

 O X y c c ji h a 1 u s piscator. 

 Leptocotis tenui rostris. 

 Oxycephalus C 1 a u s i. 

 Ox}'cephalu.s piscator. 

 Stebbingella sclerotica, 

 (oxycephalus Clausi. 

 Oxycephalus piscator. 

 Oxycephalus latirostris. 

 Streetsia porcellus. 

 Streetsia longiceps. 

 Stebbingella typhoïdes. 

 Oxycephalus piscator. 

 Oxycephalus Clausi. 

 Oxycephalus pectinatus. 

 Streetsia prono'ides. 

 Streetsia Steenstrupi. 



Oxycephalus 1 atirostris.^? 

 Oxycephalus latirostris? 

 Oxycephalus piscator? 



As I have said above I am not able to pronounce v^^ith certainty as to 

 the identity of the three last forms owing to the bad, originally given, de- 

 scriptions, but, judging from the form of the first two pairs of perœopoda 

 and the urus, I feel pretty sure that they belong to the genus Oxycepha- 

 lus. The only way to fix their identity would be to make a careful exa- 

 mination of the Mediterranean Oxycephali at the very places where they 

 are to be found. 



The limits which 1 have here assigned to the genus Oxycephalus 

 thus include only five of the above enumerated species, which may be 

 distinguished by the following synoptical table: 



A. The hiud margin of the metacarpus of the first and se- 

 cond pairs of perseopoda is strongly serrated. 

 a 1. The lateral parts of the pleonal segments are 

 smooth on the under margin. The lower front 

 corner of the carpus of the second pair of pe- 

 rseopoda is not protruding. 1. 0. piscator. 



