24 tJ. S. BUREAU OF FISHERIES 



100. Rhinobatos spinosus (Giinther). 



Mexico. 



Rhinobatus spinosus Giinther, Cat., VIII, 1870, 518, Mexico. 



101. Rhinobatos productus (Ayres). Guitarfish. 



San Francisco to San Diego. 



Rhinobatus producta Avres, in Girard, Proc., Acad. Nat. Sci. Phila., 

 VII, 1854, 196, Presidio of Monterey, Calif. 



102. Rhinobatos glaucostigma (Jordan and Gilbert). Guilarro. 



Gulf of California and southward. 



Rhinobatus glaucostigma Jordan and Gilbert, Proc. U. S. Nat. Mas., 

 VI, 1883, 210, Mazatlan. 



103. Rhinobatos leucorhynchus (Giinther). 



Panama and vicinity. 



Rhinobatus leucorhynchus Giinther, Proc. Zool. Soc. Lond., 1866, 604, 

 Panama. 



Genus 54. ZAPTERYX Jordan and Gilbert. 



Zapteryx Jordan and Gilbert, Proc. U. S. Nat. Mus., Ill, 1880, 53 

 {Flatyrhina cxasperata Jordan and Gilbert). 



104. Zapteryx exasperatus (Jordan and Gilbert). 



San Diego Baj'; abundant. 



Platyrhina exasperata Jordan and Gilbert, Proc. U. S. Nat. Mus., Ill, 



1880, 32, San Diego. 

 Trigonorhina alveata Garman, Bull. Mus. Comp. Zool., VI, 1880, 169, 



San Diego. 



105. Zapteryx xyster Jordan and Evermann. 



Panama. 



Zapteryx xyster Jordan and Evermann, Fishes North and Mid. Amer., 

 1896, 65, Panama. 



Family 24. PIATYRHINID^ 



Genus 55. PIATYRHINOIDIS Garman. 



Platyrhinoidis Garman, Proc. U. S. Nat. Mus., Ill, 1880, 522 {Platyrhina 

 triseriata Jordan and Gilbert). 



106. Platyrhinoidis triseriatus (Jordan and Gilbert). 



Coast of California, from Point Conception southward. 

 Platyrhina triseriata Jordan and Gilbert, Proc. U. S. Nat. Mus., Ill, 

 1880, 36, Santa Barbara, Calif. 



Family 25. RAJID.^. Skates and rays 



Genus 56. RAJA Linnaeus. 



Raja (Artedi) Linnaeus, Syst. Nat., ed. X, 1758, 231 {Raja batis Lin- 

 naeus). 



Dipturus Rafinesque, Caratteri, 1810, 16 {Raja batis L.). 



Platopterus Rafinesque, Anal. Nat. 1815, 93 {Raja batis L.). 



Dasybatus Blainville, Jour. Phys. 1816, 260 {communis) . 



Propterygia Otto, Nova Acta Acad. Caes. Leop. Carol. Nat. Curios., 

 1824, 777 {hyposticta; monstrous example with fins not adnate to 

 head). 



Laeviraja Bonaparte, Faun. Ital., XXV, 1839, 130 {oxyrhynchus) . 



Hieroptera Fleming, Edinburgh New Philos. Jour., XXVI, 1841, 236 

 {H. abredonensis F\ein. = R. clavata L.). 



Batis Bonaparte, Cat. Metod., 1846, 12 {radula; no description). 



Raia of various authors; merely change of spelling. 



Amblyraja Malm, Goteborg og Bohuslan's Fauna, 1877, 607 {Raia 

 circularis M.&\m^Raia radiata Donovan). 



Lencoraja Malm, loc. cit., 609 {Raja fullonica L.). 



Alpharaia Leigh-Sharpe,'^ Jour. Morph., XXXIX, 1924, 568 {Raja 

 circularis Couch). 



'« Mr. Leigh-Sharpe (Jour. Morphology, XXXIX, December, 1924) divides tlie genus Raja into nine 

 "pseudogenera" on the morphology of the genital organs. To settle the question of the standing of pseu- 

 dogenera, Jordan (in Copeia, 192.5) accepts all as subgenera. Most of those not named above {Epsiloiiraia, 

 Zetaria, Etaria, Thetaria, and lolaria), outside of our limits, may prove valid genera. 



