Sole of Cerithiopsis tubercularis; circular opening of posterior pedal gland near centre. On fine red seaweed growing on stone among muddy sand. Menai Strait, Wales, Aug. 2010.

Species

Cerithiopsis tubercularis

Photographer / copyright holder

I.F. Smith

Cerithiopsis tubercularis. Glossy maroon shell. 3 spiral rows of tubercles on each whorl, except 4 smooth apical whorls of protoconch. Base of final whorl lacks tubercles. Small black tipped siphon in siphonal notch. On fine red seaweed. Menai, Aug. 2010.

Species

Cerithiopsis tubercularis

Photographer / copyright holder

I.F. Smith

Cerithiopsis tubercularis. Glossy maroon shell. 3 spiral rows of tubercles on each whorl, except 4 smooth apical whorls of protoconch. Aperture has siphonal notch. On fine red seaweed growing on stone among muddy sand. Menai Strait, Wales, Aug. 2010.

Species

Cerithiopsis tubercularis

Photographer / copyright holder

I.F. Smith

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Hiatella arctica. Snaking, two-stranded stream of milt was expelled as temperature rose during photography; dispersed seconds later as struck side of petri dish. Force of stream cleared central area of deposition. Menai Strait, Wales. February 2011.

Species

Hiatella arctica

Photographer / copyright holder

I.F. Smith

Hiatella arctica . Shell and siphon heavily covered in almost continuous thick periostracum. Substantial byssus. Two sets of tentacles round each siphon opening. Two stranded stream of milt expelled as temperature rose during photography. Feb 2011.

Species

Hiatella arctica

Photographer / copyright holder

I.F. Smith

H. arctica. 5mm long juvenile. Silky white shell, fine concentric ridges. Trapezoidal outline. 2 ribs with uneroded spines radiate from beak to posterior. Foot tip extended at narrow rounded anterior. Siphon tips protruded from broad subtruncate posterior

Species

Hiatella arctica

Photographer / copyright holder

I.F. Smith

Hiatella arctica. 5mm long juvenile. Well developed uneroded spines. Translucent white flesh. External ligament recessed, unobtrusive. Beaks near anterior. Menai Strait, March 2011.

Species

Hiatella arctica

Photographer / copyright holder

I.F. Smith

Hiatella arctica. 5mm long juvenile. Two ribs bearing well developed uneroded spines radiating from beak to posterior. Translucent white foot extended at narrow rounded anterior. Siphon tentacles protruded from broad straight subtruncate posterior.

Species

Hiatella arctica

Photographer / copyright holder

I.F. Smith

Hiatella arctica. Adult. Two worn radial ridges just visible. Periostracum thin, but prominent, as wrinkled, on contracted siphons. Wedge form modified by rounding and undulation; shape reminiscent of Modiolus mussle. Menai, March 2010.

Species

Hiatella arctica

Photographer / copyright holder

I.F. Smith

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