342 ZIPHIIDJE. 



Nice : common, March and September, — Risso, Europ. Merid. iii. 24. 

 t. 2. f. 3 ; F. Gxw. Cetac. 159. 



" Jaws toothless, but paved with small, long and acute tubercular 

 granulations ; lower jaw with two rather longish, acute, slightly 

 arched and longitudinally grooved teeth in front ; larynx with a 

 kind of funnel at the base of the tongue, like the beak of a duck, or 

 rather of a spoonbill, 5| inches long ; gape small ; beak conical ; 

 eyes small, near middle of head ; blowers lunate, with the points 

 directed backwards; pectoral fin 19 inches long, 6| wide; dorsal 

 nearly 8 inches high, 49| inches from the tail ; the tail is broad, 

 lobes equal." Inhab. Corsica. — Doumet, Bui. Soc. Cuvier. 1842, 207. 

 1. 1. f. 2. 



According to Doumet's description, the dorsal fin of this species 

 must be further back than in any of the Dolphins, and the pave- 

 ment of the jaws is quite peculiar. It agrees with Dale and Baus- 

 sard's descriptions in the form of the blowers, but differs from them 

 in the position of the dorsal fin. 



This animal is only known by the above account extracted from 

 Risso. F. Cuvier placed it in the restricted genus Delph'mus. Risso 

 appears more correctly to have compared it with Hyperoodon ; but it 

 differs from that genus in several particidars, especially in the form 

 of the forehead and of the dorsal fin. 



Lesson (Tab. R. A. 200) forms of this species and the Physeter 

 hidens, Sowerby, the subgenus D'lodon ! 



Ziphius cavirostris, Cuvier, has long been regarded as fossil. It 

 really exists in the Mediterranean. The skuU described by Cu\aer 

 (Oss. Foss. V. t. 27. f. 3) was found by the fishermen of the Gulf of 

 Bouc. Others have since been obtained, and each of them has been 

 described as a new species. 



4. PETRORHYNCHUS. 



SkuU subtrigonal, truncated behind, with a large concavity formed 

 by the intermaxiUaries round the blowers. Beak of the skuU elon- 

 gate, tapering, conical, higher than broad, with the vomer swollen, 

 callous, forming an elongated, fusiform callosity between the callous 

 intermaxiUaries, which is truncated behind. Lower jaw slender, 

 tapering in form, without any teeth, or with two small teeth early 

 deciduous. 



Petrorhynchus, Grmj, P. Z. S. 18G5, 524. 



The skuU beaked ; the brain-case hemispherical, margined behind 

 and on the sides by the prominent edges of the maxiUa;, occipital, 

 and other bones, with a large oblong conca-\-ity under the prominent 

 enlarged nasal bones, in front of the deeply seated blowers ; the 

 inner surface of the concavity lined on the sides by the expanded 

 hinder ends of the intermaxiUaries, and edged on the sides by the 

 raised edges of these bones and the inner margins of the hinder parts 

 of the maxilho, the confines of the concavity being separated from 

 the side margins of the brain-case by a deep impression. The beak 



