432 SIGALION BUSKH. 



less quadrate anteriorly, with the inner edge rounded. The straight external edge has a 

 series of about sixteen pinnate processes, besides a few simple papillae posteriorly. Each 

 process has a granular stem, to which is attached a series of lanceolate granular lamellae 

 with a narrow papillary tip. In the typical foot the inferior lobe is shorter than in 8. 

 Mathildas, broadly clavate, and with a single papilla on its tip. The bristles are attached 

 to the whole tip (i. e. superiorly, terminally, and inferiorly), and are long and minutely 

 spinous. The ventral lobe is devoid of the superior papilla seen in S. Mathildas, and has 

 a more prominent process for the spine. The compound bristles (with jointed tips 

 t ^-below the forms with the short tapering spike) have the terminal portion of the shaft 

 covered with whorls of somewhat sparse spikes, which are more numerous than in 

 8. Mathildas, while the stouter bristles beneath have close rows of minute spines on the 

 same portion of the shaft. One or two below the spine-papilla have short tips of one or 

 two segments. The slender ventral series have only about two whorls of spikes on the 

 .end of, the shaft, and the long jointed tips have, as in the upper series, minute beaks. 

 The ventral cirrus is long, slender, and subulate, extending beyond the fleshy part of 

 the foot. 



Synonyms. 



1869. Sthenelais dendrolepis ? Mcintosh. Trans. E. S. E., vol. xxv, p. 409, pi. xii, f . 12; pi. xv, 



f. 4, 5. 

 1876. Sigalion BusMi, Mcintosh. Trans. Zool. Soc, vol. ix, p. 391, pi. ]xx, f. 14. 



Habitat.— Dredged in 90 fathoms off North Unst, Shetland, by Dr. Gwyn Jeffreys, in 

 1867. 



Head (Plate XXIX, fig. 7) somewhat pear-shaped in outline, broad in front and 

 narrow posteriorly, where it is only separated from the nuchal collar by a slight furrow. 

 The anterior border is smoothly rounded, and abuts on the conical firstfoot. It is quite 

 pale, no eye-specks being visible in the preparation. In the example a small and some- 

 what clavate papilla (tentacle) projected from the centre of the anterior border of the 

 head— a remarkable condition in Sigalion. 1 



Body somewhat stouter than in Sigalion Mathildas, and in this, respect resembling 

 Sthenelais boa, but having the same general shape both dorsally and ventrally. The 

 example is incomplete, but it would seem to reach a similar length to the species first 

 mentioned. The segmental eminences exist at the bases of the feet posteriorly, but no 

 distinct papilla is visible. The general colour of the dorsum is pale greyish. 



Scales. — The first pair of scales are almost ovoid, only the outer border is broader 

 than the inner, and has eight pinnate processes besides a smooth projection in front, 

 and some isolated papillaa posteriorly. Except at the latter part the margin is quite 

 smooth. At the bases of the processes, however, isolated papillas occur as in 8. 

 Mathildas, one or two of which are attached to the central axis as in the species just 



1 The head had been injured, so that the question might be raised as to whether this was not 

 one of the lateral tentacles pushed out of position. After careful examination, however, the view 

 above mentioned was held. 



