Gatty Marine Laboratory ^ St. Andrews. 5o 



lobe is less marked. Only the translucent hair-like tips 

 I'r )'ect beyond the surface. Behind the setigerous region a 

 part occurs in which no processes are present, and then in 

 the groove above the ventral longitudinal muscles on each 

 side is a minute process containing nine or ten bristle-like 

 uncini (PI. III. fig. 4) with tapered shafts and ends, on each 

 of which Malmgren figures a minute iiook. In the example 

 from Lervig only the first of the series is present, but, 

 though tlie tip is sharp, no curvature could be made out, so 

 that some uncertainty remains. 



6. On the Occurrence of one of the Pisionidae at St. Andrews. 



The publication by Mr. Southern of the successful results 

 of the Irish Fisheries Investigations in the group of the 

 Polychsets of the Clare Island district diiects attention again 

 to this remarkable type. Pisiune, from Valparaiso, was 

 originally placed by its discoverer, Grube*, after Oxy- 

 dromiis, then included in the Phyllodocidse, whilst Levinsenf 

 thought it approached tlie Polynoidae. Ehlers J, again, who 

 added a new species to the list, gave the family wide rela- 

 tionships, viz., most nearly with the Aphroditidse, but also 

 with the Nephthydidce, Hesionidse, Syllida), and Glyceridse. 

 Recently Mr. Southern § has recorded a foi-m for which he 

 has made a new genus, viz., Preegeria (the species being 

 P. remota), the chief differences from Fisione being, he 

 states, the reduction of the head, the backward ])osition of 

 the eyes, the unmodified dorsal cirrus of the second btistled 

 segment (this appendage in Pisione performing the functions 

 of a tentacular cirrus), and the absence of the genital 

 papillEG. How far some of these differences may be due to 

 the minuteness and immaturity of the Irish forms can only 

 at present be conjectured. The present note has been made 

 from the fact that, when engaged with the fauna of St. An- 

 drews in 1863, a sketch was made (PI. III. fig. 5) of an 

 example apparently closely allied to Mr. Southern's, though 

 the globular cirri are not indicated, and the eyes seem to be 

 differently arranged ; but in a minute and imperfectly deve- 

 loped form considerable latitude is necessary, especially as 

 only a single softened example was ot)tained in the Bay. 

 So far as can be observed the relationships already claimed 



* Annul. OEstediana, p. 17 (sep. copy), 1857. 

 t Kara-Havets Ledorme, p. 6 (sep. copy), 1886. 

 X Polychtet. magellan. Chilen. p. 60, Taf. vi. figs. 1-18. 

 § Proc. Roy. Irish Acad. vol. xxxi. no. 47, p. 60, pis. vii. & viii 

 fig. 15, A-H. 



