16 Mr. Monracv’s Description of several new or rare Animals, 
. Length one eighth of an inch. Rare. 
Two of these insects were discovered adhering to the body of 
a Father-lasher, Cottus scorpius. 
A species in every respect like this except in colour has once 
— occurred, but whether distinct or only a sexual difference is not 
to be determined. In this the body was white; the head, thorax, 
and tail maculated with yellow. 
DORIS. 
Doris PAPILLOSA. 
Ta». IV. Fig. 3. 
Doris papillosa. - Gmel. Syst. p. 3104 —Turt. i iv. p. 78.—Baster i. 
p. 81. t. 10. f. 1. 
Body ovate-oblong, rounded in front, acuminated behind: 
on the fore part are two long slender tentacula somewhat com- 
pressed and pointed ; these turn outwards, and being retractile, 
and similar in colour to the papille that are contiguous, are not 
easily discernible except when the animal is in motion : above 
these are two other annulated approximating tentacula which 
are erect, and capable of retracting within proper receptacles ; 
these are dusky with white tips: a bare space in front extends 
in an angle behind the posterior tentacula: along the middle of 
the back smooth ; the rest of the body above, covered with long 
papillous apendages, that are capable of changing their form 
from round'to flattish, and are somewhat retractile; the ground 
colour of these is yellowish white ; but when in their more usual 
order sloping backwards, some specimens appear brown by 
reason of being closely speckled with that colour: the bare 
-space along the back i is cape of contraction, and i in that state 
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