218 



MANUAL OF THE MOLLUSCA. 



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

 as in Magas. 



f 



Fig. 118. B. tulipa, Bl* 

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

 apical foramen (/) deltidium blended ^ith the shell {S) apophysis anchor- 

 shaped, the septum {&) being fm-nished with two short lamellse. Brazil, 

 13 fms.. 



Fig. 119. Animal, "j" "Dorsal valveA 



Morrisia (anomioides, Scacchi) Davidson. Fig. 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, Listr. 2 sp. Medit. 95 fms. {Forbes,) 

 ? Fossil. 1 sp. Pliocene, Palerma. 



Fig. 120. Dorsal valve with animal. "^ Fig. 121. Dorsal valve. 



* The muscular liinpressiens in Bouchardia have- been compared with those of 

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

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

 p. by the pedicle muscles. 



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

 Davidson'^8 collection j magnified te.T diameters. 



