85 



Lagenoehtnchus bbeviceps, Pucherau. The Short-headed 

 Lagenorhynchus. 



Synonyms — Delphinus hreviceps, Pacheran. Voy. Dumont d'TJrville. 

 Lagenorhynchus breviceps, Gray, S. and W., p. 271. 

 jaiecfra hreviceps, Gray, SuppL, p. 76. 



Teeth 55:29 ahout four in an inch. 



Blackish above, underneath white, pectoral fina dusky. 



Inhab : Eio de la Plata. 



*** Teeth five to six in an inch. 

 Lagenoehtnchtjs leitcopleuetjs, Easch. The White-sided Bottle-nose. 



Synonyms — Delphinus iursio, Knox. 1838. 



Delphinus leucopleurics, Easch. 1843. 

 Lagenorhynchus leucopleurus. Gray, S. and W., p. 273. 

 Leucopleurus arcticus, Gray, SuppL, p. 78. 



Teeth la^, nearly five to the inch. 



Above bluish black, beneath vfhite with a large oblique grey or 

 white longitudinal streak on the hinder part of each side. 



Of a female (the skeleton now in the Edinburgh Museum) of this 

 species, captured at the Orkneys in May, 1835, Mr. Knox gives the 

 following interesting particulars : — " It weighed 14 stone. Length 

 from tip of beak to centre of tail, 77| inches ; weight of skeleton, 7i 

 lbs. ; length of cranium, 15 inches ; of spinal column, 55i inches, equal 

 to 70i inches." 



Inhab : North Sea, Orkney, Gulf of Christiana. 



LiGENOEHTKCHrs ci/AifCULUS, Gray. The Pacific Lagenorhynchus. 



Synonyms — Lagenorhynchus clanculus, Gray, S. and W., p. 271. 

 Hector, Trans., N. Z. Institute, 1870, p. 27. 

 Meotra clancula, Gray, SuppL, p. 77. 



Teeth §:§, five in an inch. 



32-32* 



Lagenoehtnchus CEUCiGEEA, Gervais. 



Synonyms — Lagenorhynchus crucigera, Gervais, Oib. Cet. 

 JSlectra crucigera, Gray, SuppL, p. 77. 

 Teeth (?) 



LAGENOEHTNCHrs Thicoiea, Gray. The Thicolea. 



Synonyms — Lagenorhychus Thicolea, Gray, S. and "W., p. 271. 

 JSiectra Thicolea, Gray, SuppL, p. 77. 

 Teeth sijs, slender, curved, elongate, six in an inch. 

 Described from the skull only. 

 Inhab. West Coast of North America. 



