114 
Mr. Templeton’s Description 
XXI. Description of anew Irish Crustaceous Animal. By 
Robert Templeton, Esq. R.A. 
[Read September 7, 1835.] 
Zoea Pattersonii, Tempi. Plate XII. 
The body is irregularly cubical, the angles bevilled or rounded 
off. Superiorly the exterior is formed of a hyaline cartilaginous 
buckler, which sends outward a less dense, more membranous 
process, to envelope the eyes ; another forwards and a little 
downwards, hollow and subulate, to form an acuminate rostrum, 
which, with a slight curvature, extends to a distance in front 
nearly equalling the length of the buckler. On each side, and 
about midway between the eyes and the posterior extremity of 
the dorsum, a smaller process is sent perpendicularly outwards, 
or rather inclining a little forwards. Behind the extended bases 
of these, and exactly in the middle line, arises the fourth and 
largest of these processes ; it has its origin from a tolerably exten- 
sive base, which is distinctly observable by the thickening of the 
buckler, passes at first a little upwards as well as backwards, and 
then directs itself nearly horizontally backwards, the apex acu- 
minated, curving slightly downwards, and ending beyond the fork 
of the tail, so as to make its entire length almost equal to that of 
the body and rostrum together. It is, like the others, hollow. 
Beneath the bases of these processes, the buckler extends nearly 
directly downwards, so as to envelope the sides and posterior part 
of the animal : the free edge being horizontal, slightly waved and 
curving up anteriorly to the bases of the ocular peduncles and 
rostrum, so as to leave the inferior and anterior part of the animal 
completely exposed. 
The eyes are very large, and carried in an obconic tumid pe- 
duncle, curved somewhat backwards, and articulated to the buck- 
ler, through the medium of a membrane which admits of slight 
motion. When the eye is minutely examined, it seems composed 
of innumerable separate eyes, extending over the whole of the 
apical curved surface of the peduncle, and each so extremely 
small, that no separate facets are required, the smooth membrane 
enveloping the peduncle admitting of distinct vision : when traced 
inwards, each terminates in a deep brown pigmentum, which, being 
most obvious, gives the composed eye the appearance of being 
deeply immersed in the substance of the peduncle, and assuming, 
