. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). .â ^^iJKlV*"l^ltt TYPE CRUSTACEA. 409 segments are fused with the carapace, though it covers iu several others. The aiiteiiuules consist of au elougated three-jointed basal portion bearing three many-jointed Hagella, while the anten- nas are generally shorter, the exopodite being represented by a large scale. The maxillse are comparatively small, and the appendages of the five anterior thoracic appendages are crowded forwards and are termed maxillipeds, being lim
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). .â ^^iJKlV*"l^ltt TYPE CRUSTACEA. 409 segments are fused with the carapace, though it covers iu several others. The aiiteiiuules consist of au elougated three-jointed basal portion bearing three many-jointed Hagella, while the anten- nas are generally shorter, the exopodite being represented by a large scale. The maxillse are comparatively small, and the appendages of the five anterior thoracic appendages are crowded forwards and are termed maxillipeds, being limb- like structures destitute of exopodites, but possessing well- developed epipodites, and with the terminal joint capable of fiexion upon the next succeeding one. The second maxilli- ])ed is especially long and large, and with its strong terminal and penultimate joints forms a very efficient Aveapon for secur- ing prey. The three posterior appendages of the thorax are. Fig. ISO.âSquilla mantis (from LKrms). a' = antenuulcs. pm = luaxillipcds. a* = tiuteniiie. oc p = tUoracic limbs, coinpouud eyes. pa = abdomiujil limbs. slender biramous structures, the somewhat stronger abdomi- nal appendages being also biramous and somewhat lamellar swimming-feet. The last pair are especially enlarged and di- rected backwards, forming with the telsou the strong tail-fiu. Bunches of branchial filaments occur upon the outer lamel- of the abdominal appendages with the exception of the last pair. The heart is much elongated, extending from the ante- rior thoracic region as far back as the fifth abdominal seg- ment and possessing numerous pairs of ostia. It is prolonged anteriorly and posteriorly into aortas and gives off laterally in each segment a pair of arteries. The Stomatopods are all marine and pass through a com- plicated series of metamorphoses during development. Some of the principal genera are Squilla (Fig. 186), Lysiosquilla, and Gonoddctylus. , III ''I U I ill 11 ii r Iff'
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1894
