Archive image from page 110 of Discovery reports (1932) Discovery reports discoveryreports06inst Year: 1932 AMMOTHEIDAE 99 Remarks. This species is the largest that has been described up to the present. It is most closely allied to Ammothea striata, Mobius; in both forms the chelophore is large and the chela is perfect right up to the adult condition. The chief differences between the two species are listed in the following table. Ammothea striata Proboscis long, slender, curved; 6 times as long as wide and as long as trunk Scape subequal to chela and less than half of proboscis Second tibia
Archive image from page 110 of Discovery reports (1932) Discovery reports discoveryreports06inst Year: 1932 AMMOTHEIDAE 99 Remarks. This species is the largest that has been described up to the present. It is most closely allied to Ammothea striata, Mobius; in both forms the chelophore is large and the chela is perfect right up to the adult condition. The chief differences between the two species are listed in the following table. Ammothea striata Proboscis long, slender, curved; 6 times as long as wide and as long as trunk Scape subequal to chela and less than half of proboscis Second tibia the longest segment No large spines on proximal ventral margin of propodus, which is at least twice as long as claw Ammothea gigantea Proboscis stout, straight, 2\ times as long as wide and not exceeding four-fifths of trunk Scape twice as long as chela and three- fourths of proboscis Femur the longest segment Two spines on proximal ventral margin of propodus w-hich is only half as long again as claw Ammothea tetrapora, (Figs. 48, 49 and coa). St. 51. 4. V. 26. Off Eddystone Rock, East Falkland Island, from 7 miles N 50' E to 7-6 miles N 63° E of Eddystone Rock, 105-115 m.; f. S. Large otter trawl: 2 $$, 2 ??. St. WS244. 28. 52'00'S, 62° 40'W, 253-247 m.; Commercial otter trawl: I larvigerous (holotype), i ?. Description of holotype. Trunk compact, lateral processes in contact or separated by very narrow intervals proximally. Transverse body ridges prominent, each with a high, narrow, conical median projection. Cephalic segment considerably expanded anteriorly, not quite as long as the sum of the three posterior segments. Ocular tu- bercle stout, scarcely higher than wide, tapering to a point above the level of the eyes; anterior much larger than the pos- terior eyes (Fig. 48). Proboscis straight; directed obliquely downwards; widest at the base, then sub-cylindrical, narrowing distally to a blunt rounded apex; slightly more than half as long as trunk
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