Conus acutangulus Lamarck, 1810

Franklin, J. Benjamin, Subramanian, K. A., Fernando, S. Antony & Krishnan, K. S., 2009, 2250, Zootaxa 2250, pp. 1-63 : 17-18

3. Conus acutangulus Lamarck, 1810 (Figure 4)

Conus acutangulus Lamarck, 1810: 286 , no. 121 (neotype, MNHN (27 x 12.5 mm) ( Kohn 1981); "Mer des Grandes

Indes"). Conus turriculatus Sowerby II, 1866 : pl. 27 (288), figs. 643, 644 (type, BMNH (22 x 10.5 mm) ( Röckel et al. 1995)). Conus gemmulatus Sowerby III, 1870: 257 , pl. 22, fig. 8 (Holotype, BMNH (13 x 6 mm) ( Röckel et al. 1995); " China

Seas").

Materials examined: MBMCS 103 , 2 specimens, SL 32–38 mm; SW 15–17 mm .

Description. Shell medium-sized, moderately solid. Body whorl conical, sides nearly straight with broad raised ribs of fairly uniform width separated by narrow deep grooves. Ground colour white. Body whorl light brown with scattered blotches of ground colour at shoulder and centre. Shoulder carinate. Spire high, marked by distantly spaced brown spots and streaks. Aperture narrow, interior pale brown; outer lip thin and fragile.

Distribution. Melvill & Standen (1901) and Kohn (1978) reported specimens of C. acutangulus from Bombay and Malabar Coast. Kohn (1978) reported specimens (in ZSI) from Coromandel Coast and Vizhagapattinam on the east coast.

The specimens described herein were collected from Nagapattinam and Palayar ( Table 6) by trawling in 50 m and 55 m.

Remarks. The specimen collected from Nagapattinam is larger (38 mm) than the previous size (30 mm) reported by Röckel et al. (1995). This species appears to be rare along the TamilNadu Coast.