| OCR Text |
1895.] NEW MOLLUSCS FEOM BOENEO. 245 and the extremity of the foot and the hollow in which the body rests are quite different. Animal (figs. 14-16), in alcohol, of a bluish^grey colour, dorsum dark blue. The foot-sole is divided into a median and two lateral planes, the former being yellow; the lateral planes were probably much darker-a dark blue or sepia-when received they had a dark green appearance, which has gradually faded as fresh alcohol has been added. Foot-fringe deep and well marked, liueoles chocolate-brown. The extremity of the foot is truncate. Mucous pore a narrow vertical slit (fig. 15) not extending to the sole of the foot. The mantle-lobes are yellowish brown in colour and smaller than in Damayantia smithi, extending around and over the margin of the shell, but leaving a large portion visible. It is almost impossible to remove the shell without tearing away the flat and more solid upper surface of the last whorl, which really forms the first whorl, from the apex and the thin membranaceous covering at the back, because the apical portion, as will be seen from the figures (figs. 16 & 17), holds the posterior end of the visceral sac, which forms a large and distinct closely wound spiral. Habitat. Paka Paka, Kina Balu (10,000 ft.), on leaves (A. H. Everett). W e have named this species after Signor Carlo Pollonera, the distinguished Italian malacologist of Turin. Microparmarion pottonerai at first sight may appear to be not unlike Damayantia smithi, but the shell is far better developed, with a corresponding reduction of the shell-lobes, and the colour of the posterior portion and foot-sole differs also. 1. Anatomy. Visceral Mass, Sfc.-The salivary glands (fig. 21) lie one on either side of the oesophagus. The jaw (fig. 18) is strong and solid, well arched above, with a large central projection on the cutting-edge, which is very slightly concave. The lingual ribbon (figs. 19 & 20) has the formula 60-25-1-25-60 85-1-85. The centre tooth has two cusps at the base of the centre the median teeth are large and broad, with an outer basal cusp, the succeeding laterals being much curved and more equally bicuspid. Generative Organs (figs. 22, 23, 24, 25).-There is a wide saclike vagina from which arises the receptaculum seminis, a somewhat irregular-shaped sac. As in Damayantia smithi, there is no duct. The penis is a thick elongated muscular sheath; the vas deferens passes off as a narrow tube from the posterior end, in life it lies 1 Wherever a green colour was present in the alcoholic specimen, it is here spoken of as blue, |
