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No use is known for any of the other specific characters, which tend in each case to form a series. Thus in size norvegicus is the smallest, unimaculatus larger, and punctatus largest, the last reaching a of 8-1/2 inches. The subcaudal fin-flaps are developed in norvegicus, most in punctatus; each has four rays in norvegicus and unimaculatus, six in punctatus.
Triphaena, coloration of the species of. Tristram, H.B., on unhealthy districts in North Africa; on the habits of the chaffinch in Palestine; on the birds of the Sahara; on the animals inhabiting the Sahara. Triton cristatus. Triton palmipes. Triton punctatus. Troglodyte skulls, greater than those of modern Frenchmen. Troglodytes vulgaris. Trogons, colours and nidification of the.
With regard to the specific characters of the species of Zeugopterus nothing is known of peculiarities in mode of life which would give an importance in the struggle for existence to the concrescence of the pelvic fins with the ventral in punctatus, to the absence of this character and the elongation of the first dorsal ray in unimaculatus, or to the absence of both characters in norvegicus.
I note the presence of a second bearer of the nasal horn, Oryctes Silenus, who is much smaller than her kinswoman, and of Pentodon punctatus, a Scarabaeid who ravages my lettuces. But the predominant population consists of Cetoniae, or Rosechafers, most of them enclosed in their egg-shaped shells, with earthen walls encrusted with dung.
The shortening and spinulation of the scales are greatest in punctatus, least in norvegicus. In punctatus there are teeth on the vomer, in unimaculatus none, in norvegicus they are very small. If we consider fishes in general, we see that there is no evidence of any relation between many of the most important taxonomic characters and function or external conditions.
T. Gill in 1865 described a large shark known in the Gulf of California by the name of "Tiburon ballenas" or whale-shark, as a distinct genus Micristodus punctatus which, in my opinion, is the same fish. And finally, Prof. W. Nation examined in 1878 a specimen captured at Callao. Of this specimen we possess in the British Museum a portion of the dental plate.
The name was originally given by Gottsche to the largest species Z. punctatus, from the fact that the pelvic fins are united to the ventral, but this character does not occur in other species now included in the genus. There are three species, occurring only in European waters, which form this genus and agree in the following characters.