10 ART. 1. — CHARLES ELIOT: 



mostly with a reddish tinge. The white dots have disappeared. 

 The foot is pinkish and the underside of the mantle is marked 

 with lines inside, resembling fibres. 



The dorsal surface is covered with a thick low indistinct 

 reticulation, the meshes of which are pits. They are darker than 

 the ridges which divide them and no doubt correspond to the 

 dark areas in the figure.^ Both the ridges and depressions bear 

 minute prominences which perhaps were tipped with white in the 

 living animal. They are sometimes confluent. The integuments 

 contain spicules which sometimes project outside and are of two 

 kinds : (1) white, transparent, either straight or curved but not 

 granulate nor branched ; and (2) darker, larger, granulate, branched 

 and generally Y-shaped. 



The rhinophore pockets have jagged edges which are not 

 much raised. The rhinophore s are strongly perfoliate and dark 

 with light tips. The branchial pocket is irregularly 6-stellate ; 

 the branchise are six, tripinnate and tall but rather scanty. The 

 labial tentacles are distinct and linear. The foot is broad and 

 entirely covered by the mantle ; the anterior margin is notched 

 and grooved. 



There is no labial armature. The radula consists of forty 

 eight rows, each containing from 60 to 70 teeth on either side 

 of the rhachis which is bare. The last four teeth at the outer 

 ends of the rows are pectinate, the rest simply hamate. 



The intestines have a pinkish tinge. The stomach lies 

 wholly outside the liver, which is pinkish grey and covered in 

 most parts, but not everywhere, by the white, dendritic, herma- 

 phrodite gland. The spermatocyst and spermatotheca have long 

 ducts and lie at some distance from one another. There is a 

 prostate of roughly spherical form and the lower part of the vas 

 deferens is armed with a few cones bearing hooked tips. They 

 appear to be soft, not chitinous, and to be arranged in two rows. 



After comparing this specimen with the original preserved in 

 the Siboga collection, I am inclined to think that it is the 



1) They do not look like depressions in the figure but there is no doubt of the existence 

 of such depressions in the preserved specimen. 



