OXYCEPHALUS. 



55 



1830 Oxycephalus piscator is, H. MILNE EDWARDS, 



1836 0. oceanicus, F. G. GUERIN-MENEVILLE, 



1840 0. armatus, H. MILNE EDWARDS, 



0. piscator, 



1862 0. tuberculatus, C. SPKXCE BATE, 



0. oceanus, (GUERIN) C. SPENCE BATE, 



1871 0. teituiroxtrix, C. GLAUS, 



1878 0. tuberculatus, (Si>. BATE) TH. STREETS, 

 0. bullioxHs, TH. STREETS, 



0. sclcroticus, 



1879 0. piscator, (M. EDW.) C. GLAUS, 

 0. similis, C. GLAUS, 



0. latirostris, 



0. porcellus, 



0. lomjiceps, 



0. typhoides, 



1884 0. Edtvardsii, GEO. THOMSON, 



1887 0. Clausi, C. BOVALLIUS, 



0. pectinatus, 



0. pronot'des, 



0. Steentrupi, 



1832 Orio ormtltommphus, A. Cocco, 

 1850 Ornithoramphus Coccoi, G. NATALE, 

 1864 Natalius candidissimus, A. COSTA, 



Oxycephalus piscator. 

 Oxycephalus piscator. 

 Xiphocephalus armatus. 

 Oxycephalus piscator. 

 Oxycephalus tuberculatus. 

 Oxycephalus piscator. 

 Leptocotis tenuirostris. 

 Oxycephalus Clausi. 

 Oxycephalus piscator. 

 Stebbingella sclerotica. 

 Oxycephalus Clausi. 

 Oxycephalus piscator. 

 Oxycephalus latirostris. 

 Streetsia porcellus. 

 Streetsia longiceps. 

 Stebbingella typhoi'des. 

 Oxycephalus piscator. 

 Oxycephalus Clausi. 

 Oxycephalus pectinatus. 

 Streetsia pronoi'des. 

 Streetsia Steenstrupi. 



Oxycephalus latirostris?' 

 Oxycephalus latirostris? 

 Oxycephalus piscator? 



As I have said above I am not able to pronounce with 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 peraeopoda 

 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 I 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 hind margin of the metacarpus of the first and se- 

 cond pairs of peraeopoda 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. 



