. Advances in marine biology: volume 17. Coral fisheries. 128 L. HILLIS-COLINVAUX. Fig. 37. H. scabra. Specimen from Florida, IX 1895, Curtiss. Scale bar is 2 cm. Ty'pe specimen. Florida, Sands Key, Howe 2905, 30 March, 1904 (NY). Habitat. Growing on rocks from near low-tide line to at least -20 m. Geographic distribution. North-western Atlantic. In general form and anatomy H. scabra is closely allied to H. tuna, particularly to the somewhat modified plants of the Caribbean, and has frequently been identified as tuna in herbaria. From this species it can often be distinguished macroscopically
. Advances in marine biology: volume 17. Coral fisheries. 128 L. HILLIS-COLINVAUX. Fig. 37. H. scabra. Specimen from Florida, IX 1895, Curtiss. Scale bar is 2 cm. Ty'pe specimen. Florida, Sands Key, Howe 2905, 30 March, 1904 (NY). Habitat. Growing on rocks from near low-tide line to at least -20 m. Geographic distribution. North-western Atlantic. In general form and anatomy H. scabra is closely allied to H. tuna, particularly to the somewhat modified plants of the Caribbean, and has frequently been identified as tuna in herbaria. From this species it can often be distinguished macroscopically by the rather bluish cast which commonly occurs towards the apices of the branches, and by the rough texture which results from the indurated spines which project from the peripheral utricles, their length varying to a limited extent with the age of the segment. When well developed, the spines are usually visible with a good handlens. The relative ease of separation of the peripheral utricles after decalcification and their small surface diameters are also characteristic of this species, the latter averaging 42 [j,m in H. scabra as opposed to 70 [j,m in H. tuna. Adjacent fused nodal units may remain. 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 Hillis-Colinvaux, Liewellya. London : Academic Press ; Toronto
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