Gattif Murine Laboratory^ St. Andrtivs. 55 



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

 jmvect beyond tlie surfaee. Bcbiiid the seti^'eious n j^ion a 

 part occurs in wliicb no pi-oees.ses are present, and then ia 

 the {rroove above the ventral lonnitudinal nius(;Ies on each 

 side IS a minute process containin<? nine or ten bristle-like 

 unciiii (l-*l. III. fig. 4) with tapered .shafts and ends, on each 

 ot which Malmgren figures a niiiuite hook. In the example 

 from Lervig only the fir>t of the series is present, but, 

 thou-ih the tip is sharp, no curvature could be made out, so 

 that some uncertainty remains. 



G. 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 

 Pulychccts of the Clare Island district directs attention again 

 to this remarkable type. Pisione, from Valparaiso, was 

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

 dromiis, then included in the Phyllodocidae, whilst Levinsen f 

 thought it approached tlie Polynoidae. Ehlers +, attain, who 

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

 tionships, viz., most neaily with the A|)hroditid[e, but also 

 with the Nephthydidae, Hesionidae, Syllidac, and Glycerida. 

 Recently Mr. Southern § has recorded a form for which he 

 has made a ne\v genus, viz.. Progeria (the species being 

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

 states, the reduction of the head, the backward position of 

 the eyes, the unmodified dorsal cirrus of the second bristled 

 segment (this appendage in Pisione performing the functions 

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

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

 the minuteness and immaturity of the Iiish forms can only 

 at proent be conjectured. The jMesent note has been made 

 from the ("aft that, when enga^^ed with the fauna of St. An- 

 drews in 18G3, a sketch was made (PI. III. fig. 5) of an 

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

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

 differently arianged ; but in a minute and im[)erfectlv deve- 

 loped form considerable latitude is necessary, espcciallv as 

 only a single softened example was obtained in the Bay. 

 So far as can be observed the relationships already claimed 



• Annul. Gilstediana, p. 17 (sep. copy), 1857, 

 t Kara-IIavets Ledoriue, p. 6 (sep. copy), 1886. 

 X Polychait. niagellau. Cbilen. p. 60, Taf. vi. fig-s. 1-18. 

 § Proc. Roy. Irish Acad. vol. xxxi. no. 47, p. 00, pis. vii. & viii. 

 fig. 15, x H. 



