 ... eighth joints are fused into one long piece, the sixth being much the longest of these three joints. At the anterior end of each joint, around the rim of the cup, there is a row of rather short stiff spines. There are also a variable number of spines...  Studies from the Biological Laboratory - Seite 445von Johns Hopkins University. Biological Laboratory - 1890Vollansicht - Über dieses Buch
 | 1890 - 380 Seiten
...SYSTEM. Owing to the difference in the mouth-parts the muscles of the head are more developed in Lcpisma than in Anurida. Other differences in distribution...that place. Close behind this, at the sides of the month-opening, are the mandibles (Fig. 69). These are stout chitinous jaws, each with several pointed... | |
 | Maine Agricultural Experiment Station - 1903 - 240 Seiten
...spines. There are also a variable number of spines scattered over the surfaces of the several joints. The mouth is situated on the ventral side of the head and, on account of the arrangement of the mouth parts, is placed so far posteriorly that it opens at a point... | |
 | 1903 - 426 Seiten
...spines. There are also a variable number of spines scattered over the surfaces of the several joints. The mouth is situated on the ventral side of the head and, on account of the arrangement of the mouth parts, is placed so far posteriorly that it opens at a point... | |
 | Maine Agricultural Experiment Station - 1903 - 240 Seiten
...spines. There are also a variable number of spines scattered over the surfaces of the several joints. The mouth is situated on the ventral side of the head and, on account of the arrangement of the mouth parts, is placed so far posteriorly that it opens at a point... | |
 | Maine. Department of Agriculture - 1903 - 514 Seiten
...spines. There are also a variable number of spines scattered over the surfaces of the several joints. The mouth is situated on the ventral side of the head and, on account of the arrangement of the mouth parts, is placed so far posteriorly that it opens at a point... | |
 | Maine Agricultural Experiment Station - 1902 - 1392 Seiten
...spines. There are also a variable number of spines scattered over the surfaces of the several joints. The mouth is situated on the ventral side of the head and, on account of the arrangement of the mouth parts, is placed so far posteriorly that it opens at a point... | |
 | 1902 - 520 Seiten
...spines. There are also a variable number of spines scattered over the surfaces of the several joints. The mouth is situated on the ventral side of the head and, on account of the arrangement of the month parts, is placed so far posteriorly that it opens at a point... | |
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