. Fig. 44. Ophiura meridionalis (Lyman). Part of oral side (a), xi8; dorsal side (b), < 10. Proximal part of arm, side view (c). x 18. take. My specimens, as well as the co-type sent me, have only three spines throughout; only quite exceptionally have I occasionally found four spines on a joint. It may be remarked that the upper spine is generally slightly the largest. Not being able to see from extant descriptions and figures how this Ophiomastiis rotundus could be distinguished from Lyman's Ophioglypha meridionalis from off La Plata, I applied to the British Museum for the loan of one of
. Fig. 44. Ophiura meridionalis (Lyman). Part of oral side (a), xi8; dorsal side (b), < 10. Proximal part of arm, side view (c). x 18. take. My specimens, as well as the co-type sent me, have only three spines throughout; only quite exceptionally have I occasionally found four spines on a joint. It may be remarked that the upper spine is generally slightly the largest. Not being able to see from extant descriptions and figures how this Ophiomastiis rotundus could be distinguished from Lyman's Ophioglypha meridionalis from off La Plata, I applied to the British Museum for the loan of one of the original specimens of O. meridionalis, which was very kindly granted me. The result of the comparison of the two species is that there can be no doubt of their identity. As seen from Figs. 44, 45 there is some slight difference in the arrangement of the scales of the disk, the five primary radial plates being replaced by an irregular circle of eight plates in the type of meridionalis; this is, however, quite evidently an anomaly, and an exactly similar arrangement may be found in some of the specimens from South Georgia, though by far the majority of them have a regular circle of five primary radials. On the ventral side and on the arms no difference exists between Ophiomastiis rotundus and Ophiura
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
