218 



MANUAL OF THE MOLLUSCA. 



resembles Bouchardia externally, but has tlie diverging processes of the loop 

 as in 7 " 



Fig. 118. B.tulipa,Bl* 



Bouchardia (tulipa) Davidson, fig. 118. Beak prominent, with a minute 

 apical foramen (/) deltidium blended with the shell (d) apophysis anchor- 

 shaped, the septum (s) being furnished with two short lamellae, Brazil, 

 13 fms. 



Fig. 119. Animal. * Dorsal vatoc.t 



Morrisia (anomioides, Scacchi) Davidson. Eig. 119. Shell minute, 

 conspicuously punctate ; foramen large, encroaching equally on both valves ; 

 hinge area small, straight ; loop not reflected, attached to a small forked 

 process in the centre of the valve. Animal with sigmoid arms, destitute of 

 spiral terminations ; cirri in pairs. Distr. 2 sp. Medit. 95 fms. (lories.) 

 ? Fossil. 1 sp. Pliocene, Palermo. 



Fig. 120. Dorsal valve with animal, f Fig. 121. Dorsal valve. 



* The muscular [impressions in Bouchardia have been compared with those of 

 Ter. Cumingii, of \rhich the animal is known. The large impressions (r)in the disk of 

 the ventral valve appear to be formed by the cardinal muscles; a. by the adductor; 

 p. by the pedicle muscles. 



t Fig. 119. c. loop; /. pedicle notch ; o. the ovaries. From the originals in Mr. 

 Davidson's collection ; magnified ten diameters. 



