16 TESTACELLA SCUTULUM. 
The LINGUAL TEETH are very long, comparatively slender, slightly curved, apex 
distinctly barbed or hamate, the median apophysis markedly nearer the basal end, 
and the teeth apparently deficient of the cutting blade. present upon the convex side 
L222 
SS ge 
(o Lp 
Ni WA ihe 
13 
5 
Fic. 23.—Transverse row of teeth from the odontophore of Fic. 24.—Isolated teeth from the 
Testacella scutulum x 20, from Chiswick, collected hy Mr. S. C. fifth and thirteenth longitudinal rows 
Cockerell ; figured from a photograph. of the radula of 7. scutulum x AO. 
of the teeth of haliotidea at the apiealend. The angle formed by the convergence of 
the rows of teeth towards the centre of the radula is more acute than in 7. maugei, 
but less than in haliotidea, and the vestigial median row of teeth can occasionally 
be discerned. 
The dental formula of a Chiswick specimen, collected by Mr. S. C. Cockerell, is 
oe x 46=1564. 
Reproduction and Development.—-The cretaceous eggs of this 
species are deposited underground, and are not numerous, they are distinctly 
oval in shape, about five mill. lone by three mill. broad, white or very pale 
pink when first deposited, soon, however, becoming of a 
brownish-white colour. ‘They have been found in this p 
country as early as February. Hatching takes place in... g. Me 
from twenty to thirty-six days, the young attaining full sisw/eata’ x 1! (after 
growth in about eighteen months. Cassese = eee 
Gassies & Fischer describe the egg of 7. bisulcata as round and about the 
size of No. 2 shot, but their figure has a distinctly oval outline, similar to 
that of 7. scutulum. 
Habits.—Gassies & Fischer remark, under the heading of 7. bisulcata, 
that this species is less in the habit of leaving its subterranean retreat than 
its congeners, and ascribe its less frequent capture to this cause. Mr. Kew, 
however, remarks that he somewhat frequently sees 7. scutu/um during the 
spring and autumn months crawling about in the early morning, or even at 
mid-day, at the foot of the low garden-walls im the north London suburbs. 
The sluggish movements and the usual tawny colour of the body tend to be 
protective upon stony soils and gravelled garden pathways. 
Parasites and Enemies.—Mr. H. E. Quilter was fortunate in detect- 
ing upon 7. scutulum, from Belvoir, examples of a species of mite, which 
were evidently parasitic, and which he describes as having a round, hairy 
and shiny white body, with four pairs of five-jointed, hairy, ambulatory legs 
terminated by small claws, mouth with goal appendages or chelicerw. 
Geological History.— No re- 
cord of its occurrence in the fossil 
state is known to me, but I do not 
hesitate to include with this species 
the 7. williamsiana Nevill, and 
the 7. auriculata Gass. & Fisch. 
The 7. williamsiana is from the meoR Fic. 27. 
Holocene conglomerate of the caves Fic. 26.—Testacella williamsiana Nevill, x 4 
mV : ean “Ot Loui (after Nevill). 
of Mentone, near gorge of St. Louis, Fic. 27.—Testacella auriculata Gass. & Fisch., 
in the Alpes Maritimes, the author — * 34 (after Gassies & Fischer). 
differentiating it from 7. bisulcata by its almost vertically prominent central 
apex and its regul: ir, close, and deep suleations. The 7. auriculata G. & FP. 
