Fishes of the Western North Atlantic 497 



Dicerobatls mobular Blainville, in Vieillot, I'auna Fran?., Poiss., 1825: 41, pi. 8, figs, i, 2 (descr., meas., [ill. 



not seen], Medit.). 

 Pterocephalus massena Swainson, Nat. Hist. Fish. Amphib. Rept., i, 1838: 170 (name only, equals Cephalopt- 



erus massena Risso 18 10). 

 Pterocephala giorna Swainson, Nat. Hist. Fish. Amphib. Rept., 2, 1839: 321 (name only, equals Raja giorna 



Lacepede 1 802-1 803). 

 Pterocephala fabroniana McCoy, Ann. Mag. nat. Hist., jp, 1847: 176, pi. 11 (descr., ill. S. Ireland). 

 Cephaloptera massena Hill, Intell. Observ., 2, 1862: 167 (by ref. to Risso, 18 10). 

 Cephaloptera fabroniana Dumeril, Hist. Nat. Poiss., j, 1865: 658 (diagn., Medit.). 

 Dicerobatis giornae Giinther, Cat. Fish. Brit. Mus., 8, 1870: 496 (diagn., refs., Medit.). 

 Mobula mobular Garman, Mem. Harv. Mus. comp. ZooL, 56, 1913: 450 (descr., refs.). 



Doubtful Synonyms: 



Sjualus edentulus Briinnich, Ichthyol. Massil., 1768: 6 (descr., dried head, no lower teeth, no definite local.). 

 Aodon cornue, Lacepede, Hist. Nat. Poiss., 4° ed., in Buffon, Hist. Nat., I, 1798: 33, 151 (descr. after Briin- 

 nich, 1768, Squalus edentulus). 



Possible American Synonyms and References: 



Raie manatia, Lacepede, Hist. Nat. Poiss., 4° ed., in BufFon, Hist. Nat., J, 1798: 160, pi. 7, fig. 2 (specimen 

 9 ft. wide, apparently Mobula because of position ot mouth, but ill. shows forked caudal, equat. America). ^'^ 



Raja manatia Bloch and Schneider, Syst. Ichthyol., 1801 : 364 (descr. by ref. to Raie manatia, Lacepede, 1798). 



Mobula Jiypostoma Fowler, Fish Culturist, 9 (8), 1930: 115 (good photo. New Jersey specimen 9 ft. wide; per- 

 haps M. mobular because of size). 



Genus Ceratohatis Boulenger 1897 



Ceratobatis Boulenger, Ann. Mag. nat. Hist., (6) 20, 1897: 227; type species, C.robertsii. Jamaica. 



Probable Generic Synonym : 



Squalus, Briinnich, Ichthyol. Massil., 1768: 6; for S. edentulus Briinnich, dried head with cephalic fins, but 

 no teeth in lower jaw; no stated locality. 



Generic Characters. Mouth on lower surface of head, with teeth in the upper jaw 

 only. Other characters as in Mobula. 



Range. Known definitely from only a single specimen from Jamaica. 



Species. C. robertsii Boulenger 1897, from Jamaica; perhaps also the Squalus eden- 

 tulus of Briinnich, 1768, locality not known. 



Remarks. It is possible that the only known specimen actually is an aberrant 

 Mobula hypostoma that failed to develop teeth in the lower jaw. "o But since it seems to be 

 normal in all other respects, and since another mobulid without lower teeth was reported 

 many years ago, the genus Ceratobatis is accepted here provisionally. 



Ceratobatis robertsii Boulenger 1897 

 Figure 1 15 



Study Material. None. One female (type), 770 mm wide (approximtae measure- 

 ment), not seen by us, from Jamaica, in British Museum [Natural History]. i" 



118. Referred by Garman (Mem. Harv. Mus. comp. Zool., j6, 191 3: 454) to synonymy of Mania birostris. 

 120. Miss Ethelwyn Trewavas, who examined the specimen in the British Museum, corroborates the original statement 

 that it has teeth in the upper jaw only. 121. Collected by Rev. Seed-Roberts. 



3- 



