OF CONCHOLOGY. 73 



Genus VOLVATELLA, Pease. 

 (Proc. Zool. Soc. London, I860.) 



Remarks. — This genus was founded on a single specimen, 

 dredged from a salt water pond, on sea weed. Since then two 

 other species have been discovered of larger size. The shell 

 closely resembles that of Lophocercus. It is more convolute, 

 not so open and more extended posteriorly, assuming the form 

 of a tube. Shells heretofore associated with Lophocercus may 

 prove to be members of this genus ; such no doubt is the case 

 with L. Vigourouxii, Montr. The animals agree in their gen- 

 eral characters, but differ widely in the form of their cephalic 

 disk. The foot is small, mantle concealed, and the animal can 

 withdraw wholly within the shell. The vent is posterior, and 

 the eyes are immersed in the fold on the sides of the head, not 

 visible from above. 



It is no doubt closely allied to Cylindrobulla, Fischer, the 

 animal of which is not known. 



Volvatella fragilis, Pease. Proc. Zool. Soc. London, 1860. 

 Plate 7, fig. 4. 

 Remarks. — We furnish herewith a figure of the above species 

 for comparison with those that follow. 



Volvatella pyriformis, Pease. — Plate 7, fig. 5. 



Description. — T. suboblique cylindrica, tenui, fragilis, mera- 

 branacea ; epidermide flavescente induta, longitudinaliter obso- 

 lete subflexuoso-plicata, latere sinistro inflato ; canali producto; 

 apertura antice rotundata. 



Hah. — Huaheine. 



Animal uniform pale orange ; as seen through the shell, 

 freckled with red, which assumes transverse bands. Head sub- 

 quadrate, slightly emarginate in front and provided with small 

 lateral crests. Eyes black, inserted in a fissure on the side of 

 the head. Foot oblong, truncated and widest in front, and 

 gradually tapering to a rounded tip behind. Motions active ; 

 when disturbed discharging a viscid white fluid from the vent. 



Remarks. — Descriptions of the shells of this genus cannot be 

 relied on for reason of the distorted change that takes place 

 soon after they are removed from the animal and become dry. 



The shell resembles that of Lophocercus Vigourouxii, Montr. 



Volvatella Candida, Pease. — Plate 7, fig. 6. 



Description. — T. rnembranacea, cylindracea, postice truncata ; 

 valde convoluta, epidermide flavescente induta ; apertura parva, 

 longitudinis testae dimidiam haud sequans. 



