104 
THE VOYAGE OF H.M.S. CHALLENGER. 
visceral mass is pendent and then presents the aspect 1 which is seen in an unpublished 
drawing of Corolla spectabilis, kindly sent me by Mr. Vm. H. Dali. In regard to the 
other parts, fin, proboscis, &c., this drawing shows a structure quite analogous to the 
Gleba. Corolla is then simply a Gleba that has lost its shell. The specimen, unfortunately 
in a bad condition, obtained by the Challenger in the North Pacific, shows this clearly. 
The specimen includes not only the animal but several bits of the shell. When put 
together the latter corresponds to the general form of the shell of Gleba cordata, some- 
what thicker dorsally, very thin on the ventral edge, and bearing on its surface regular 
and very clearly marked tubercles. Unfortunately, the damaged condition of this shell 
does not permit me to give a satisfactory drawing. 
Mr. Wm. H. Dali has, however, abandoned the idea of his Corolla being entirely 
destitute of shell. In sending me the drawing of the animal he wrote to me that he thought 
Corolla possessed “ some sort of a shell like Cymbulia,” adding that in the region where 
he had captured Corolla he had found in his tow-net “ some oval thin crystalline 
gelatinous slipper-shaped shells,” “covered with little points.” This entirely agrees 
with the description I have given of the debris collected by the Challenger. 
Dimensions (of Challenger specimen). — Diametrical breadth of the fin a little more 
than 5 cm., approximate length of the shell 4 cm. 
Habitat. — North-east Pacific Ocean; lat. 42° 50' N., long. 147° 25' W. (Dali). 
Challenger Specimens. — Living specimen. 
On June 29, 1875 ; Yokohama to Sandwich Islands ; lat. 35° 49' N., long. 171° 46' E. 
The presence of the genus Gleba has been recorded at other localities in the 
Pacific Ocean : — China Sea (Boas), 2 a form with a short proboscis ; New Ireland, 
about 4° S., 152° W. (Quoy and Gaimard), 3 — Cymbulia punctata, also with a short 
proboscis, and recognised as Gleba ( Tiedemannia ) by most subsequent authors. 
Unfortunately these forms are too imperfectly known to be entered in the catalogue of 
the species. 
Lastly, the Challenger Expedition has collected larval shells of Gleba (PI. II. 
fig. 17) in the following place : — 
Station 216a, February 16, 1875; north of New Guinea; lat. 20° 56' N., long. 
134° 11' E. 
Several of the young forms of Cymbuliidse, which have lost their shells, are described 
as distinct species, under different generic names, and some of these probably belong to 
the genus Gleba. 
1 Van Beneden, Exercices Zootomiques, Mdm. Acad. Sci. Bruxelles, t. xii. pi. ii. fig. 1. 
2 Spolia atlantica, p. 141. 
3 Voyage de decouvertes de l’Astrolabe, Zoologie, t. ii. p. 377, pi. xxvii. figs. 35, 36. 
