Gulfi/ .]farine Lahovatori/, St. Andrews. .TO 



From the Zotlandic seas comes the tweuty-tliinl form, 

 Liisilla loveni, Malmgrcn. In this the cc|)halic plate passes 

 i'orwanl from a small dorsal collar and is tlirown into various 

 folds, the edges of which appear to he somewhat thinner than 

 in I'o/i/cirnfs, and hence show a more elegantly frillc;d 

 margin. Ventrally the ])latc forms a broad flap lixed later- 

 ally, but with the inner edge (and flap) free. The surface 

 is covered with numerous clavatc and grooved tentacles, l)nt 

 the ventral flaps have clusters of more minute filiform ones. 

 'I'hc mid-ventral region behind the mouth has a huge and 

 l)rom!nent tongue-sha])ed process — smoothly continuous 

 with the oral surface anteriorly, where it is fixed ; it is free 

 and somewhat conical posteriorly. In lateral view it forms, 

 indeed, a spout-like process at right angles to the body with 

 an elevation (glandular) in the centre. 



The body is enlarged anteiiorly and marked by the t\>o 

 lateral rounded bands, minutely tuberculated and ringed, 

 the largest tubercles or pa[)ilhe being on the ventral surface 

 of the longitudinal bands. The segments are not distinctly 

 defined, cxcejit by the setigerous processes in front ; but 

 !Malmgren states that the jjosterior region (absent in the 

 British example) presented about twelve deep sulci. He 

 gives the lentjth of 30-50 mm., and the width of the tumid 

 anterior legion as 5-G mm., that of the posterior part 2- 

 2o mm., and the latter, though minutely ringed, is smooth. 



Six setigerous processes occur anteriorly in the groove, 

 though no bristles are visible under a lens. Each consists of 

 a slightly conical process with a curved tip, and [jresenting a 

 white streak in the interior due to the bristles, which consist 

 of a single closely arranged fascicle of sim])le translucent 

 bristles, which curve distally in conformity with the outline 

 of the ])rocess and end within the tissues at the tip. Exce[)t 

 for stilfening the setigerous processes, these bristles arc thus 

 devoid of function. 



In Tricliobranchus fflac'iulh, Malmgrcn, the twenty-fourth 

 form, the cephalic lobe dilfers from that of Pulycimis in its 

 reduced coiulition. Dorsally it has a groove separating it 

 from the first segment, and is provided with two eye-spots, 

 the lobe then projecting forward as two symmetrical rounded 

 bosses flanked on each side by a translucent free flap. From 

 the surface springs a dense series of tentacles — filiform and 

 fissiform. The filiform are jjale pink in colour and — like the 

 larger, clavatc, grooved, red-streal<ed ones — keep up a con- 

 tinuous movement. The translucent lateral flaps are devoid 

 of tentacles. The distinction between the three groujis of 



