CoLr.AN. — Opisfliohmirh Fauna of Co. Dvhlin. 193 
Dalkey and Malahide, 1906-14, a total of 98 specimens, 
as many as 39 in one haul in 2f. off Skerries ; in 13 shore 
gatherings at Shennicks Island, Skerries, 1906-13, a total 
of 207 specimens collected or noticed, 90 being counted 
in the course of an hour's collecting in July, 1913, the 
majority on Ohclia dichotoma investing Chorda filum and 
Laminaria saccharina : N.C. Largest 12-5 m.m. long. 
Though usually with pink markings, many specimens were 
taken of almost pure cream colour. Individuals only 
4 m.m. in length were found spawning. The readily 
detached papillae of this species when cast off by the 
animal displayed independent vital motions, quite as 
remarkable for their persistence as those already noticed 
unde- Facclina Dniinmondi. One papilla detached at 
3.40 pm. on the 24th July, 1908, from a specimen dredged 
off Skerries continued to make periodic automatic move- 
ments up to II a.m. on the following day, or for upwards 
of 19 hours, these movements not being confined to the 
papilla as a whol(\ but extending to each of its black-tipped 
tubercles. After swimming for some time on the surface in 
the dish of sea water, where it progressed by a series of 
twitches o; spasms, the papilla sank to the bottom and rest- 
ing there e'-ect on its base proceeded at intervals to nod or 
bow with a curious simulation of purposeful action its 
body swinging through an angle of some 30 degrees, while 
the tubercles carried on a proper motion of thei; own. 
On examination of the radulae of six specimens from 
3 mm. to 5-5 mm. in length the number of teeth was 
found to range from about 70 to 110. In all six the moutli 
cavity underneath the radula contained loose teeth from 
5 to 15 in mmiber. Bergh found up to 21 of such loose 
teeth in D. fragilis (Bcitr. znr Kenntn. dcr Jlolid. ix. p. 
27, 1888). 
D. fragilis ^Forbes). 
Not infrequent in dredgings. One specimen on Anten- 
nularia in 8 f . off Chu ch Island, Skerries, 1908 ; Colgaii, '09. 
Taken in five hauls in from 2 to 15 f. off Skerries, July, 
