CATULLOCERAS LEESBERGI. 
279 
Catull. Bumortieri and Gatull. Leesbergi by its coarser ribs, and from the latter 
also by its narrower whorls. 
I have identified this fragment with one figured by Brauns as Am. insig- 
nisimilis ; but, as Dr. Haug observes in a letter, the whorls of that fossil 
are thicker and more depressed. He thinks that my figure is identical with 
Rarpoceras elmagum, De Gregorio but that has smaller and more closely-set ribs. 
The name insignisimilis was given on account of a fancied resemblance to 
Am. insignis. The real relationship of the species shows that this name is very 
inappropriate. 
I collected this fragment from the Dumortie7Ha-heds in a road-cutting on the 
south flank of Breakheart (Stinchcombe) Hill near Dursley, Gloucestershire. 
Catdlloceeas Leesbeegi (Branco). Plate XXXIX, figs. 10, 11. 
1879. Haepocebas Lessbergi, Branco. Untere Dogger ; Abh. z. geol. Spez.- 
Karte v. Elsass-Lothringen, pi. v, 
fig. 1. 
1885. — — Haug. Beitr. Monogr. Harpoceras ; Neues 
Jahrbuch fiir Mineral, &c., Beil.- 
Bd. iii, p. 664. 
1887. DuMOETiERiA Lessbeegi, Haug. Polymorphidae ; Neues Jahrbuch, &c., 
Bd. ii, p. 131. 
The material of this rare species is decidedly deficient. The little specimen 
figured is but a cast very poorly preserved. Its front view does not show the 
carina, but there is a faint carina to be detected on the other part of the whorl. 
I must refer the reader to Branco's work {loc. cit.) for a good figure of this 
species. In reality it only differs from Gatull. Bumortieri in having fewer turns, 
broader whorls, greater inclusion, and being more pinched laterally, so that it is a 
normal mutation of that species. The specimen figured is plainly not a young 
specimen of Gatull. Bumortieri, as its whorls are so much broader comparatively. 
Dr. Haug tells me that this name is rightly written Leesbergi," and not 
"Lessbergi" as Branco put it: because the Luxemburg geologist to whom it is 
dedicated writes his name " Leesberg." 
The figured specimen and some fragments of whorls came from the 
Bumortieria-hedL^ of Wotton-under-Bdge, Gloucestershire. A fragment of a 
larger specimen which came from the Long Wood, Stanley, near Stroud, is 
possibly of this species ; but it is so poor that I cannot decide between this and 
^ Quoted as synonym ot Gatull. Dmnortieri. 
