26 de:ep sea fishes. 



ANTACEA. 



Antacea Raf., 1815, Analyse de la Nature. 



SCYLIORHINID^. 



The commonly accepted orthography and etymology for the family 

 name of the Dog-nosed sharks, " Scf/Uior/iinidce," is somewhat liable to 

 criticism. As compounded by Blainville the generic term from wliich it 

 is taken was made up of the Greek name of the dogfishes, a-KvXta, caniculce 

 (see Aristotle, History of Animals, book VI. chapter X.), with that of the 

 nose, piv ; whether correct in its original form, Sct/IiorJiinus, is another 

 question. In the common form of the name derivation is traced to (tkvWu), 

 to rend or to mangle. 



This family is unrepresented in the present collection. Species belong- 

 ing to it occur on both sides of the area immediately concerning tliis paper: 

 to the northward several types from considerable depths have been de- 

 scribed by Gilbert and others, for instances Sc/jUorhiims brunneiis Gilb., 

 from the Gulf of California, and *S'. rentriosus Garm., from Acapulco and 

 northward, are likely to descend to depths of more than a hundred and 

 fifty fathoms at particular times ; to the southward again, there are several 

 species, of which one at least, S. canescens Glint., from the southwest coasts 

 of South America, is entitled to a place in the list of deep sea Selachians. 

 Off the Atlantic coasts of the United States and the West Indies two species 

 from great depths have been discovered in recent times, S. rdifcr Garm., 

 and ;S'. ivofnndorum G. B. Two species were discovered by Alcock, in the 

 collections made by the "Investigator" in the northern part of the Indian 

 ocean, one of which he doubtfully identifies with Glinther's South American 

 species S. canescens. To the list of species from the eastern Atlantic Vaillant 

 has added three new ones from the collections of the steamers " Travailleur " 

 and " Talisman," but one of them, Pristiurtts atlanticus, is identified by 

 Collett, 1896, with the. earlier described P. melastomus Raf. 



SQUALID.E. 



Squalidce Bonaparte, 18.31. 



The only member of this family obtained by the steamer " Albatross " in 

 the vicinity of the Galapagos Islands is a species of the genus Centroscyllium, 

 very closely allied to C. Fabricii from the western portion of the North 



