DEEP-SEA DREDGINGS. 3 
meroides, Elops, and Argentina. Dercetis and Blochius may also 
come up. Species of all classes of the animal kingdom which 
have been very rarely met with by fishermen and naturalists are 
likely to be found in the deepest waters, in which neither hooks 
nor nets are generally lowered. Nothing is known concerning the 
greatest depth at which fishes may live. Upon this point I hope 
to obtain positive data. 
The Mollusks will, no doubt, afford a rich harvest of novelties, 
among which some may be of the deepest zoological interest. It 
stands to reason that a variety of Nautiloid Cephalopods may be 
discovered when Nautilus proper and Spirula are so rarely found 
alive, and among new forms there may be those combining char- 
acters of Argonauts with features of Nautilus ; some may even be 
coiled up like Turrilites. Belemnitic Squids would appear natu- 
ral. Among Gasteropods we may look for high spired Natica- 
like types, for representatives of Acteonella, Avellana, and the 
like ; for small Volutoids of the Tertiary and Cretaceous types, for 
Rostellarias, even for Nerineas, and more particularly for forms 
intermediate between Firulea and Cyprea. Among Acephala I 
would expect a variety of Myacea approaching those described in 
my monographs of that family from the Jurassic and Cretaceous 
formations, such as Ceromya, Corimya, Circomya, Goniomya, 
Myopsis, etc., with Panorpa and Pholadomya, and others recall-. 
ing perhaps also Cardinia, Gresslya, or Cardiacea more closely 
related to Conocardium than the living species, perhaps leading to 
Opis, or Trigoniae of extinct types akin to Myophoria, with Pa- 
chymya, Diceras, Grammisia, Inoceramus, Pterinea, Monotis and 
Posidonia. Rudistes should take the place of oysters and the 
harvest of Brachiopods should be large. 
Among Crustacea it is natural to suppose that genera may be 
discovered reminding us ef Eryon or of Pemphyx, Gampsonyx, or 
some Amphipods, and Isopods aping still more closely the Trilo- 
bites than Serolis, or Limuloids approaching that extinct family. 
The classification, embryology, and order of succession of Echi- 
noderms is now so well known, that it is perhaps still more easy 
to anticipate the character of discoveries in this branch of the an- 
imal kingdom than in any other. I expect confidently, to find 
Spatangoids approaching Holaster, Toxaster, Ananchytes, Hemip- 
neustes or Metaporhinus, and others akin to Dysaster; Echino- 
lamps approaching Pygurus, Nucleolites tending to Clypeus, Gal- 
