SQUALID.E. 27 



Atlantic, to C. fjfranidosus from tlie Falkland Islands, and to C. onuUmn from 

 the Bay of Bengal and the Arabian Sea. Without access to the types it is 

 difficult to determine the degrees of affinity. One of the more prominent 

 differential features of the species described below, C. nifjnun, is apparent in 

 the five-cusped teeth, the teeth of each of the other species beitig described 

 as tricuspid. A small badly damaged specimen, taken by tlie French steamer 

 " Talisman," at a depth of more than eight hundred fathoms, " devant le 

 banc d'Arguin," off the northwestern portion of Africa, has been identified 

 by Vaillant, with some hesitation, as belonging to C. Fabricii. This depth 

 is the greatest reported for the genus, though all of the species are recorded 

 from depths of more than two hundred fathoms. 



Of genera not reported in the '"Albatross" collection a number of species 

 occur at great depths. Etmoptcnis sjntiax has been noted from more than 

 three hundred fathoms by Vinciguerra, as also E. pusillus by Vaillant, in the 

 Mediterranean and the neighboring Atlantic. The occurrence of E. jmsillits 

 off the western coasts of the North Atlantic, noted by Goode and Bean, is 

 to be questioned. The specimen taken by the steamer " Blake " off St. 

 Kitts, is at hand, and apparently belongs to E. sjnimx ; it has the spines on 

 the scales, and the peculiar markings of deep black seen on that species on 

 the lower portions and immediately behind the ventrals, especially on j'oung 

 and lighter colored individuals. Comparing it with the type specimen of 

 E. HllUanns Poey discloses the fact that the latter would better be placed 

 under E. spinax than under E. jnisillns. All the Squalidse commonly taken 

 in the deep water fisheries off the coast of Portugal will probably appear in 

 the list of deep sea species. This will include the species of Centrophorus, 

 Centroscymnus, Scymnodon, Oxynotus, and others to which definite depths 

 have not yet been assigned. The species of Centrophorus described by 

 Glinther, 1877, from Japan, have habits similar to those of the eastern 

 Atlantic. The depths for the genus range from two hundred or more to 

 a thousand fathoms, more or less, the greatest being that assigned C. ccdceus 

 and C. squamosus by Vaillant. The same author gives a similar record, of 

 six hundred and seventy-two to ten hundred and thirteen fathoms, to Cen- 

 trosci/mnvs coelolepis, and one of seven hundred and eighty-four fathoms to 

 Centroscymnus obscunis, a new species, taken by the *•' Talisman " off the 

 coasts of Soudan. According to Wright, G. coelolepis is taken by the Por- 

 tuguese fishermen at four hundred to five hundred fathoms, and Goode and 

 Bean state that it is •• abiuidant on the ofl'shore banks of Xew England, 



