. Discovery reports. Discovery (Ship); Scientific expeditions. 379 Suh-order INCIRRATA, Grimpe Family ELEDONELLIDAE Eledonella massyae, Robson, subsp. purpurea, subsp. nov. St. 86. 24. vi. 26. 33° 25'00" S, 6° 31'00" E. 1000 (~o) m. 4J m. tow net: one ?. Dimensions (in mm.). Arms, length: L. Length of mantle (apex to eye) S3 ist pair ... 45 Mantle, width ... .:. 35 2nd ,, 37 + Head, width 18 3rd „ ... ... 4i(?+) 4th „ ... 40 R. 45 This form is related more closely to E. massyae (Robson, 1924, 1924 a) than to the other Atlantic or the Pacific forms. It differs in the following particu
. Discovery reports. Discovery (Ship); Scientific expeditions. 379 Suh-order INCIRRATA, Grimpe Family ELEDONELLIDAE Eledonella massyae, Robson, subsp. purpurea, subsp. nov. St. 86. 24. vi. 26. 33° 25'00" S, 6° 31'00" E. 1000 (~o) m. 4J m. tow net: one ?. Dimensions (in mm.). Arms, length: L. Length of mantle (apex to eye) S3 ist pair ... 45 Mantle, width ... .:. 35 2nd ,, 37 + Head, width 18 3rd „ ... ... 4i(?+) 4th „ ... 40 R. 45 This form is related more closely to E. massyae (Robson, 1924, 1924 a) than to the other Atlantic or the Pacific forms. It differs in the following particulars: (i) The suckers (which attain a maximum number of 10) are more widely spaced, viz. 6-5 mm. apart (as a maximum), instead of 4-5 mm. (2) The arms are a little shorter (54 instead of 56 per cent). (3) The funnel- organ (Fig. 6) is longer and more angular. (4) The radula differs in several particulars. In massyae the rhachidian bears three cusps on each side of the mesocone, the first lateral five cusps on an average. In the new variety there are two cusps aside on the rhachidian, and four cusps on an average on the first lateral. A still more striking difference is in the size of the mesocone of the rhachidian, which is j\ of the base in the type of massyae. In the new variety it is | of the base in length. (5) The gills are much smaller in the variety, being about 9 per cent of the mantle in length, while those of the type are about 16 per cent. (6) The colour is deeper and the chromatophores on the head tend to fuse up to a very dark purple Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography; Great Britain. Colonial Office. "Discovery" Committee. London, New York, Cambridge University Press
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