160 PROCEEDINGS OF SOCIETIES. 



slightly shorter, cylindrical, slender, a few scattered hairs over its ex- 

 ternal surface ; eighth and ninth very short, scarcely conjoined equalling 

 seventh, equal and globular ; tenth, equalling seventh. A strong tooth 

 over each eye at base of rostrum, and a small tooth over origin of 

 antennas. 



Colour, rose-pink or green, though there is much variety in this ; 

 one specimen (a female), taken in May, was coloured as follows : — 

 Carapace, a transparent clear pink, with which the emerald-green 

 masses of extruded ova contrasted most vividly, tail and segments of legs 

 being banded with white and rose colour. Another specimen was even 

 more vividly coloured : — Carapace clear cobalt-blue, through which the 

 emerald-green masses of ova shone, the remainder of the body a clear 

 pink ; the legs prettily banded with a darker red. 



It has only occurred to me in comparatively deeper water, as at Bray 

 and in Dalkey, where it is frequent in the lobster and crab pots. Of its 

 distribution nothing is known : it has been recorded in Scotland by Dr. 

 Howden, from Frith of Forth and Orkney. 



The characters of the rostrum and carapace; second pair of legs, 

 median plate of tail ; size ; and difference of locality separate it markedly 

 from H. Cranehii (vide Plate X., Figs. 7, 8, 9, 10, and Plate IX., Pigs. 

 2a, 2b). 



Palcemon squilla. — Extremely common in rock-pools, especially 

 among Enteromorpha intestinalis. In ova in May, April, and June. Of 

 one remarkable form of this species (?) I have figured the beak (Plate X., 

 Figs. 11, 12, 13, 14); it is invariably much smaller than the normal 

 type, and frequents pools which are less frequently visited by the tides. 

 In colour and other characteristics I find such a close accordance, I must 

 look on the characters drawn from the beak as not of specific importance, 

 the only other difference being in the comparative weakness of the di- 

 dactyle hands. The following are the varieties in the number of teeth 

 of the rostrum met with: — Apex bidentate, above 7-10, below 2-4; 

 apex simple, above 7-9, below 2-3 ; the commonest form being 7 or 8 

 above, apex bidentated, and 3 below. 



Belfast (W. T.), Dublin, Galway; doubtless confounded with P. 

 serratus in lists. 



P. Leachii. — I have seen no authentic Dublin specimens of this spe- 

 cies; all those shown me either preceding species, or P. varians. I have 

 collected specimens in Galway, and Professor Melville showed me nu- 

 merous specimens collected there by him. The specimen thus named in 

 J. V. Thompson's collection is not this species, but the variety (?) of P. 

 squilla, described above. 



Dublin (?), Galway. 



My sis chameleon. — Much commoner than I formerly stated; very 

 abundant in sand-pools ; in ova in March, April, and May. The ova 

 are easily hatched, and the young are similar to the parent when ex- 

 truded. 



