PHYLLODOCE PAEETTI. 85 



throughout. The body of the new region is yellowish with a slight shade of green 

 dorsally, a somewhat opaque linear dorsal streak indicating the intestine. Yellow would 

 thus appear to be the fundamental colour, the greens and browns being subsequently 

 formed. 



The proboscis has not been extruded in any example. De Saint Joseph found thirty 

 papillse at the entrance to the stomach. 



The foot has dorsally the foliaceous cirrus, which springs from a long pedicle 

 and anteriorly has a bluntly cordiform outline, a regularly cordiform shape in the middle 

 and following regions of the body, and a more or less lanceolate outline posteriorly. In 

 the anterior and middle regions it is flecked with dark pigment in Neapolitan specimens, 

 and in one from Plymouth the dark pigment is even more conspicuous. The setigerous 

 region forms a somewhat long blunt cone with a horizontally bifid tip. 



The shafts of the bristles (Plate LXXIX, fig. 27, male) have a very slight distal curve, 

 and the hue is brownish. Moreover, the dilated terminal region is more or less truncate, 

 and thus the spinous area is shortened by the absence or abrasion of the conical end with 

 its larger curved hook-like spines. The contrast with the typical Phyllodoce lamelligera is 

 thus marked. The truncate end of the shaft in Paretti has a much shorter spinous 

 region, but the trend of the spines is the same. The distal sabre, moreover, is shorter, more 

 filiform towards the tip, and the serrations on the edge are more minute. If the effect of 

 age and special surroundings affected the bristles as just described, then the connection of 

 this form with Phyllodocera lamelligera would be clear. In an example from Plymouth the 

 free parts of the bristles were tinted of a brownish hue, the same pigment being greatly 

 developed in the cirri and setigerous region. 



Reproduction. — Goodrich and Louis Fage * describe the segmental organs as having a 

 largely ramified nephridial lobe, each of the divisions with its solenocytes and tubercles. 

 The funnel is large and crenate. 



The Phyllodoce Paretti, De Blainville, 1 is a species about which diverse opinions may 

 be taken, more especially as no connected series from the young to the adult condition ' 

 has been studied. So far as known all those procured in the Channel Islands and in 

 South England have been adult, though, if the Phyllodoce sjplendens is the same form, two 

 young examples, of 7 and 16 mm. respectively, about which, however, there maybe doubt, 

 were found by De Saint Joseph. 



Grube's 2 original description (1840) of Phyllodoce Rathldi agrees with the structure 

 of P. Paretti, for he notes the form of the tentacular and dorsal cirri, the nature of the 

 bristles, and the coloration. He found it at Palermo. 



Grube's 3 diagnosis is : Mouth-segment scarcely visible from the dorsum; dorsal cirri 

 heart-shaped ; the longest tentacular cirrus as long as the fifth segment ; on each side only 

 four tentacular cirri, whereas P. laminosa has five. 4 



De Quatrefages appears to have made two new species in connection with this form, 

 for his P. Kinbergi can scarcely apply to any other European species — notwithstanding 



1 f Ann. Sc. Nat./ 9 C ser. hi, p. 282, figs. 8 and 9. 



2 ' Actin. Ecliin./ etc., p. 78. 



3 <Fam. Annel./p. 129. 



4 The author had misinterpreted the condition in this form. 



