Gaily Marine Laboratory^ St. Andrews. 87 



rather long fimbriae^ with a broad base and a tapered tip, the 

 latter, however, not being acute ; and the collar runsventro- 

 laterally almost to the base of the anterior cin us or tentacle, 

 after the manner of Layis koreni. The cirrus is of average 

 lengthy and is- tapered from base to ajjcx. From its base a 

 ridge passes obliquely backward and inward on each side 

 to the mouth. The great length of the rim of the dorsal 

 scabrous jdate circumscribes the area of the veil, which is 

 the smallest yet observed ; but its disposition is similar, for 

 it has a slight ventral fold on each side to aid in guarding the 

 tentacles. The anterior or free edge is fringed with com- 

 paratively long subulate fimbriae. The tentacles are perhaps 

 less numerous than in allied forms, but their structure is the 

 same, the distal ends being often flattened and with a median 

 groove joining that proceeding along the column. 



The folds at the sides of and beliind the mouth in the 

 main agree with those of other species. 



The second cirrus or tentacle arises on the dorsal edge of 

 a glandular ridge, wliich ventralwards presents two divisions, 

 viz. an outer transversely elongated rounded eminence, and 

 a larger inner ridge which passes with slight obliquity to a 

 median division. In front of this prominent ridge are two 

 or three minor ones, the grooves of which converge toward 

 the mouth. From the dorsal edge of the cirrus a small 

 ridge runs dorsally, but soon disappears behind the fimbriated 

 rim of the scabrous region. 



The branchiae occupy a similar position to those of Lagis 

 koreni, but are specially modified, in so far as the lamellaj of 

 the first branchia are proportionally larger — both broader 

 and longer — and the basal axis to which they are attached is 

 shorter. Thus, the apparatus is more fan-shaped and less 

 like the scorpioidal cyme. As in Layis, the larger lamellae 

 are internal, and they gradually diminish to the small ex- 

 ternal end. The second branchia is considerably less in all 

 its parts, but it has the same abbreviation of the basal axis 

 or stem. 



The first branchia would appear to belong to the segment 

 behind the second long cirrus, which sends a prominent 

 glandular ridge to the mid-ventral line. The second pertains 

 to the ridge immediately behind, which also passes to 

 the mid-ventral line, where, as in the previous form, a 

 separate shield occurs. It is further distinguished by a 

 considerable flattened glandular lobe which injmediately 

 follows the branchia, and which would apparently act as a 

 guard to the first branchia. 



