196 REPORT ON THE NUDIBRANCHIATE 



pointed at the tips. There was considerable variability in the 

 arrangement of the papilla, mainly due^ however, to the animals 

 being in different stages of growth. In the majority of individuals 

 there was a pair in front, set opposite each other, and then two or 

 three other papillse behind them, arranged alternately, of which the 

 G.r&t-formed one seems always to be on the left side. The heart was 

 situated behind the first pair. In the largest individual, which was 

 only one eighth of an inch in length, there were five pairs of papillee, 

 the second and fourth being the largest, with a single papilla on the 

 left side behind the last pair. The heart was situated between the 

 second and third pairs. The first pair was double, having two 

 papillae on each side, the outer ones being very small. In this large 

 individual there was some faint brownish-yellow or slightly olivaceous 

 pigment scattered over the body and on both pairs of tentacles. 

 The " glands " of the papillge were somewhat sacculate and of a 

 faint yellowish-brown colour. The usual opaque white at the tips 

 was yellowish at the extremity and faintly bluish in an ill-defined ring 

 just below. 



In one individual examined, which possessed remarkably long and 

 slender dorsal tentacles, the left tentacle showed an abnormality in 

 the form of a linear and slender outgrowth close to its base, directed 

 backwards and outwards, and larger than either of the oral tentacles. 

 M'Intosh figures a somewhat similar abnormality in the same ten- 

 tacle of a Doto coronata (17, plate ii, fig. 14). 



The spawn of this variety of Tergipes despecta was abundant on 

 the stems of the Hydroid. The masses were not so reniform as they 

 are represented by Alder and Hancock ; they are more or less sphe- 

 rical in shape, slightly compressed from side to side and flat or very 

 slightly concave along one edge (the hiliim), from the centre of which 

 proceeded a short gelatinous stalk for attachment. This stalk was 

 constantly present, although I do not find it described for either 

 Tergipes despecta or exigua. The spawn-masses varied in size, some 

 containing only a quarter the number of ova found in the majority. 

 The size of the spawn-masses was never so large as indicated in 

 Alder and Hancock for T. despecta, and their shape was never so 

 oblong and reniform as figured for T. exigua. The eggs were con- 

 tained each in a separate capsule, and the larvae possessed very long 

 cilia on the edges of the velar lobes. 



These little Eolids appeared to me to feed not upon the Hydroid 

 itself but upon the minute Alg« which accumulate on its stems 

 and branches. 



Giard thinks the egg-masses of this genus to be of such form 

 and colour, and to be so arranged upon the stems, as to imitate the 

 gonosomes of the Hydroids upon which they are found. 



