113 SYSTEMATIC ARRANGEMENT 



serrated ; second and third somewhat similar, claw-like, the former 

 serrulate on the outside. 



Galerus sinensis lays its spawn on stones and old shells. The 

 spawn is enveloped in bundles of fimbriated, colourless membrane, 



Fig. 61. — Teeth of Galerus sinensis. 



the edges of which appear white or yellow owing to the include'd 

 germs (eggs). The fry have a helicoid shell, rather large eyes on 

 the base of short, triangular tentacles, and large, ciliated neck- 

 lobes.— Brit. Moll. 465. 



The shells of the young animal (which may be seen on the apex 

 of the adult specimen) are spiral, with gradually enlarging whorls like 

 a small Capulus. 



Galerus chinensis varies in colour from white, hyaline, yellow, 

 to reddish or dull violet ; also in being more or less elevated, the 

 crown more or less spiral, and the surface smooth or covered with 

 small, arched, elevated scales ; sometimes one side is smooth and the 

 other very rough, or the middle smooth and the periphery scaly, 

 or the centre scaly and the circumference smooth. The same varia- 

 tions occur in the species found in other seas. 



Galerus sinensis, which was kept in confinement, swallowed a Go- 

 niodoris nodosa preserved in the same vessel. — Brit. Moll. 465. 



4. Trochita. 

 Shell conical, spiral ; whorls three or more ; inner lip concave. 



1. T. radians, t. 58*. f. 3. 



2. T. pileus, t. 58*. f. 1. 



3. T. occidentalis, n. s., t. 130. f. 2 ; Adams, Gen. Moll. t. 40. f. 5. 



Trochita trochiformis : living attached to rocks or large detached 

 stones on the coasts of Chili and Peru. They attach themselves very 

 firmly, and do not change their place, covering their eggs which are 

 enclosed under the shell. The animal is uniform pale yellow ; the 

 foot oblong, transverse, as if two-lobed in the middle in front ; the 

 tentacles long, with the eyes on the lower third of their length. 



5. Crucibtjlum. 



Shell subconic ; inner lip very short, leaving a cup-shaped central 

 cavity. 



f Internal cup small, at the end of a distinct shelly plate, show- 

 ing it is the cavity in the axis, like the umbilicus in other 

 shells. 



1. C. undulatum. 



