. Catalogue of the Australian stalk- and sessile-eyed Crustacea. Australian Museum; Malacostraca -- Australia; Malacostraca -- Australia Sydney (N. S. W. ); Crustacea -- Australia; Crustacea -- Australia Sydney (N. S. W. ). INTRODUCTION. Xlll pairs are represented by appendages which serve for the attach- ment of the eggs, and in the male two pairs of styliform appen- dages having the function of external reproductive organs are connected with the first and second Fig. II.—Diagramic view of the upper surface of carapace of a Crab, shewing the position of the regions. fr, Front; o, e
. Catalogue of the Australian stalk- and sessile-eyed Crustacea. Australian Museum; Malacostraca -- Australia; Malacostraca -- Australia Sydney (N. S. W. ); Crustacea -- Australia; Crustacea -- Australia Sydney (N. S. W. ). INTRODUCTION. Xlll pairs are represented by appendages which serve for the attach- ment of the eggs, and in the male two pairs of styliform appen- dages having the function of external reproductive organs are connected with the first and second Fig. II.—Diagramic view of the upper surface of carapace of a Crab, shewing the position of the regions. fr, Front; o, eye ; g, epigastric region ; g', protogastric; g", nasogastric ; g":, metagastric; g1"1, urogastric; h, hepatic region; cs, portion of cervical groove; iri, epibranchial region; br0*, mesobranchial; br*, metabranchial. The carapace is flatfish, or gently convex above, and turns down suddenly at the sides so as to form a well-marked border. Below it fits down closely over the bases of the thoracic limbs, leaving only a small space in front of the great chelipedes or pincer-claws for the ingress of the water to the gills. The surface of the carapace of the Crab is generally marked out by grooves into certain regions. The space between the eyes is termed the front (Fig. \\.,fr.) ; in some Crabs, as in the Prawn, it is drawn out anteriorly in the form of a beak or rostrum. Behind the front is the gastric region (g), so called from its corresponding in a general way with the situation of the stomach within the carapace; the gastric region is sub-divided frequently into certain subregions ; these are usually a small anterior epigastric region (a), followed by two larger protogastric regions (g1), behind and between which is a single mesogastric region (g") ; external to the mesogastric region on each side is a hypogastric sub-division (g'") ; and behind these a mesial urogastric (g""). Behind the gastric region is the cardiac (c). Between the gastr
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Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1880, bookyear1882
