LAGENORHYNCHUS SUPERCJLIOSUS. ' 93 



ganliug the skeleton iu question, Scblegel makes the followiug state- 

 ments: 



That this species {D. SKpcrciliosHs), moreover, occurs off the Cape of Good Hope ap- 

 pears from the observations of our late explorer, Dr. VauHorstok, who has seut us a 

 complete skeleton of the species.* 



What tbe observations of Van Horstok were does not appear. Tbey 

 seem to bave been sucb as to convince Scblegel tbat bis skeleton be- 

 longed to Lesson and Garuot's D. superciliosus. 



Tbe following is a description of this skeleton : No. 40; Voy. Horstok ; 

 Cape of Good Hope. Vertebrte: C. 7; D. 13; L. and Ca., 53 ; total, 73. 

 Liimbars twenty. Cbevrons twenty. Only tbe atlas and axis united. 

 Superior transverse process of tbe seventb cervical vertebra long; 

 tbe otbers rudimentary. Inferior transverse process of tbe sixtb cervi- 

 cal ratberlong; of tbe fiftb sborter ; of tbe otber cervicals, rudimen- 

 tary. Neural spines of tbe tbird to tbe seventb cervicals very short. 

 Neural spine of tbe first dorsal pointed ; the succeeding ones increase 

 in breadth backward to tbe tenth or eleventh dorsal, then again de- 

 crease. Those of the lumbars subequal. Neural arch obsolete on the 

 sixtieth vertebra. Transverse process obsolete on the fifty-fifth verte- 

 bra. First six ribs with beads; these ribs also join the sternum. 

 Sternum of four segments ; tbe first largest, the last rather rudimentary. 

 Acromion long and broad, reaching to the anterior angle of tbe scapula ; 

 coracoid about one-balf tbe leugtb of tbe acromion, broadened at tbe 

 extremity. Radius and ulna straight. Carpalstive; three large ones 

 in tbe distal row, two smaller ones in tbe proximal row. (Mauus de- 

 fective.) 



81cull. — The skull resembles that of P. obscurus, but tbe intermaxillie 

 are more nearly tiat. The prenarial triangle extends about an eqnal 

 distance before and back of tbe maxillary notcb, and is depressed, but 

 fiat and not rugose. The sides of the intermaxilbe bordering the nasal 

 aperture are beveled as iu Cephalorliynehus. Tbe maxillaj are but little 

 bent. A wide opening (^'" at the widest point) intervenes between 

 the premaxilhie and extends along the entire beak. Palate very flat. 

 Pterygoids on a wide base (4.1'"'); they are broken, but were appar- 

 ently iu contact, except at the tip. The ramus of tbe mandible is slen- 

 der toward tbe symphysis, which is not strongly keeled. Teeth, |||"!^. 



Scapula, 15.5^'" long; 9.8""' bigb. Highest neural arch, 8.4"". Total 

 leugtb of the skeleton as mounted, 153"". 



Tbe chief peculiarities of tbe skull of this species are tbe flatness of 

 tbe premaxilliB and the beveling of their proximal extremities. In these 

 respects it is very ditt'erent from tbat of P. obscurus, witb wbicb it agrees 

 well in proportions. On account of the flatness of tbe intermaxilbe and 

 tbe crowding of tbe foramina at the symphysis of the mandible, I am 

 inclined to place this species iu tbe genus Lagenorhinichus. Tbe small 



* ScWegel, Abhaudluugen, Heft i, 1841, p. 22. 



