!?6 BUSYLLIS BLOMSTRANDI. 



repetition of the brilliant green flashes. Even when undisturbed a point of green light 

 appeared here and there. After immersion in spirit a moniliform band of green 

 phosphorescence occurred on each side and continued for some time, the tail being 

 brightest. For five minutes the body was faintly luminous, and yet hernias of the tissues 

 had occurred at the injured points. 



This species was first clearly described by Mr. Grosse (1855), who found it not 

 uncommon in his jars containing Hydroids, from Ilfracombe. It is probably, however, 

 the Nereis cirrhigera of Viviani. 1 



The Eusyllis pliosphorea of Verrill 2 comes very near this species. 



De St. Joseph thinks that all the representatives of Eusyllis reproduce without 

 alternation of generations. He does not think that the Syllis tubifex of Gosse — which is a 

 stolon of a Eusyllis — is to be confounded with my Eusyllis tubifex — which apparently he 

 had not found at Dinar d. 



2. Eusyllis blomsteandi, Malmgren, 1867. 



Specific Character s.— Head subrectangular with the angles rounded. Eyes four, 

 forming a rectangle (with occasionally two oculiform points in front). Palpi somewhat 

 ovate. Median tentacle longer than the lateral, and the dorsal of the first pair of 

 tentacular cirri exceeding the length of the tentacle. All are indistinctly articulated, and 

 the tips of these and of the first dorsal cirri are coloured brownish. Malmgren states that 

 the long tentacular cirri are twice or thrice the diameter of the body. Body five eighths 

 of an inch long, of an orange colour and having the typical shape. The dorsal cirri 

 become shorter than the breadth of the body after the fourth. Two caudal cirri occur 

 at the tapered posterior extremity. Proboscis with a single tooth at the tip in extrusion, 

 and a series of papilla behind it. Proventriculus with fifty-five rows of points, and the 

 lateral pouches of the ventricle are small. Foot has dorsally the somewhat short, 

 unjointed cirrus, then a bluntly-conical setigerous region. Bristles have slightly curved 

 shafts with serrations on the bevelled region at the tip, and on the convex edge of the 

 dilatation. Terminal piece of moderate length and nearly equally bifid at the tip. 

 Ventral cirrus is somewhat ovate, and does not quite reach the tip of the setigerous 

 region. 



Synonyms. 

 1867. Eusyllis Blomstrandi, Malmgren. Annul. Polych., p. 40, Tab. vi, f. 43. 

 1869 - » „ Mcintosh. Trans. P. S. Edin., vol. xxv, p. 415. 



1885. „ „ Cams. Fauna Medit., p. 229. 



18 87. „ „ De St. Joseph. Ann. Sc. Nat., 7 e ser., p. 171, pi. viii, f. 39. 



!892. „ „ Marenzeller. Polychast. Ostspitzberg, p. 411, Taf. 19, f. 3. 



Habitat— Dredged in the Minch, August, 1865. Plymouth? (Allen). 

 Mediterranean (Cams), Madeira (Langerhans), Dinarcl, France (De St. Joseph), 

 Spitzbergen (Marenzeller). 



1 ' Phosphorescentia Maris/ p. 9, Tab. iii, figs. 1 and 2 (1805). 



2 ' Trans. Conn. Acad./ iii, p. 39, pi. vii, fig. 2. 



