REPORT ON THE PTEROPODA. 
103 
though the tentacles are not shown in the latter. On the margin of the fins the animal 
has five very characteristic indentations, which escaped the notice of van Beneden but are 
shown in the drawing of Forskal. Krohn regarded these as characteristic of a particular 
species, Tiedemannia crenipterci, distinct from the Tiedemannia “ napolitana ” of Delle 
Chiaje and van Beneden ; but he has subsequently acknowledged the identity of the two 
forms. The shell appears smooth in small specimens, but bears in the large forms regular 
tubercles, which are, however, less developed than those of Gleba spectabilis. 
Habitat. — Mediterranean ; Nice, Naples, Messina. 
Some remains of a species of Gleba with a long proboscis were found in the Atlantic, 
lat. 24° to 25° N., long. 32° to 33° W. ( fide Boas), 1 and previously to this Krohn observed 
at Tenerife larvae of Tiedemannia which he named neapolitana } Possibly this was the 
Mediterranean species, or one very nearly related to it. 
2. Gleba chrysosticta (Krohn). 
Tiedemannia chrysostica, Krohn, MS., in Troschel, Beitrage zur Kenntnies der Pteropoda, 
Archiv f. Naturgesch., 1854, Bd. i. p. 218. 
According to Krohn, Troschel, and Gegenbaur, this species differs from the preceding, 
which it resembles in size, in having a shorter proboscis and golden spots on the 
integument. But there are no drawings of this species, and the descriptions do not say 
whether the proboscis is very broad, nor whether there are indentations on the distal edge 
of the fins. Notwithstanding the courteous search made by Dr. Jules Barrois at Ville- 
franche and by Professor Nicholas Kleinenberg at Messina, I have unfortunately been 
unable to procure specimens which would have enabled me to complete the diagnosis of 
this form. 
Habitat. — Mediterranean ; Messina (Krohn, Troschel, Gegenbaur), Villefranche 
(Paneth). 3 
*3. Gleba spectabilis (Dali). 
1872. Corolla spectabilis , Dali, Description of sixty new forms of Molluscs from the West Coast 
of North America and the North Pacific Ocean, Amer. Journ. of 
Conch., vol. vii. p. 137. 
Characters and Description. — The animal has a short proboscis, which is very broad, 
especially towards its free extremity ; the fin is subtriangular, with no indentations on the 
distal edge. 
Dali has established for this form the new genus Corolla on account of the 
following characteristics : — the pendent visceral mass and absence of shell. Now in 
Gleba (“ Tiedemannia napolitana ” for example), when the shell has fallen off, the 
1 Spolia atlantica, p. 141. 
2 Beitrage zur Entwickelungsgeschichte der Pteropoden und Heteropoden, p. 19. 
3 Beitrage zur Histiologie der Pteropoden und Heteropoden, Archiv f. mikroslc, Anat ,, Bd. xxiv. p. 231, 1885. 
