Hind-feet short and broad, with five welldeveloped toes; the first large, nailless and opposable; the second and third slender and united by a common integument as far as.
In addition to the water-conducting tissue or hydrom there is a welldeveloped tissue (leptom) inferred to be a conducting channel for organic substances.
In the latter a pallial siphon, a welldeveloped proboscis and an unpaired oesophageal gland are always present, in the former they are usually absent.
Further examination of the enormous collections gathered by the author, and preserved in the Museum of Yale University at New Haven, Connecticut, showed him that this last bird, and another to which he gave the name of Apatornis, had possessed welldeveloped teeth implanted in sockets in both jaws, and induced him to establish (v.
In Limulus small entosternites are found in each somite of the appendage-bearing mesosoma, and we find in Scorpio, in the only somite of the mesosoma which has a welldeveloped pair of appendages, that of the pectens, a small entosternite with ten pairs of muscles inserted into it.
The hind-foot is very like that of a rhinoceros, having three welldeveloped toes.
There is a welldeveloped brain dorsal, to the mouth; this gives off a pair of oesophageal commissures, which surround the oesophagus and unite in a median ventral nerve-cord which runs between the longitudinal muscles to the posterior end of the body.
These monkeys are characterized by their lank bodies, long slender limbs and tail, welldeveloped thumbs, absence of cheek-pouches, and complex stomachs.
Khantengri (Mushketov, Semenov, Inylchik) and the Kok-su Mountains (Fedchenko, Shurovsky), south of Peak Kaufmann, there are welldeveloped glaciers.
Root, stem and leaf can be distinguished even in the simplest forms, and the plant is traversed by a welldeveloped vascular system.
The following species are aberrant in respect of these characters: Peripatus (Opisthopatus) cinctipes, Purcell (Cape Colony and Natal), presents a few Australasian features; there is a small receptaculum seminis on each oviduct, some of the legs are provided with welldeveloped coxal organs, the feet have one anterior, one posterior and one dorsal papilla, and the successive difference in the ages of the embryos in the uterus, though nothing like that found in the neotropical species, is slightly greater than that found in other investigated African species.
All birds have, like most reptiles, a welldeveloped third lid or " nictitating membrane," which moves from the inner canthus obliquely upwards and backwards over the cornea.
The Dermaptera and the Orthoptera agree in having welldeveloped mandibles, so that the jaws are adapted for biting; in the incomplete fusion of the second maxillae (which form the labium) so that the parts of a typical maxilla can be easily made out (see the description and figures of the cockroach' g.
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