156 Prof. M'liitos!i'3 Noteis from the 



marked and broad belt from the posterior third of tlie second 

 dorsal sloped downward and slightly backward to the ventral 

 border. Traces of the dark band at the base of the tail are 

 also visible, and the dark border to the tail is evident. la 

 this example the filaments on the first gill-arch and the gill- 

 rakers are exactly as in the young form as regards number, 

 though the filaments presented a distnl dilatation and 

 terminated sooner ventrally than in the younger form of 

 70 mm. 



2. On the British Spionidsp. 



The Spionidse were included by Dr. Johnston in the 

 Catalogue of the British Museum under the Ariciidae, a 

 group which comprised repi'csentatives of various families. 

 He recognized for the first time several, e. g. Nerine vul- 

 garis { = Scolccolepis vulgaris), besides Nerine coniocephala 

 {=Nefine foliosa, Sars), Spio filicornis, O. F. M., Spio seti- 

 cornis, O. Fabr., and Leucodore ciliatus, Johnst. In the 

 'Invertebrate Marine Fauna of Plymouth ' (1904) no Spio 

 is recorded, but Scolccolepis vulgaris, Johnst., Nerine foliosa, 

 Sars, and Nerine cirratulus, Delle Chiaje, Aonides oxy- 

 cpphala, Sars, Polydora ciliata, Johnst., P. fluva, Claparede, 

 P. C(Bca, CErsted, and P. hoplura, Claparede, are entered, 

 besides Scolccolepis giardii, De Quatrefages, a synonym of 

 Scolccolepis vulgaris. 



In Nerine foliosa, Sars, the head forms a somewhat blunt 

 cone, the dorsal ridge terminating posteriorly in a rounded 

 enlargement followed by a short tentacle. The palpi are 

 elongate and tapering. The body is from 6 to 8 inches in 

 length and nearly | in. broad, somewhat flattened dorsally 

 and slightly convex ventrally, little tapered in front, but 

 gradually diminishing posteriorly to thecrenate anus, and in 

 one a cirrus in the median ventral line and longer than the 

 diameter of the vent occurs. The segments are about 200. 

 In extrusion the proboscis forms a short cylinder, the 

 free margin presenting an irregular series o£ frills, whilst 

 ventrally the column is marked by longitudinal grooves. 

 Occasionally in full protrusion two prominent lobes occur 

 distally with a small bilobed process above and a single 

 lobe below, whilst within the frilled margin laterally and 

 inferiorly is a crenate brown line indicating a differentiation. 



In the anterior region of the body (in spirit), where both 

 fillets are present in the feet and where the branchiae are 

 large, each segment dorsally shows two transverse ridges 



