G fitly Marine Labor atortjj St. Andrews. 165 



of nearly the same diameter almost to the neck^ which is 

 narrowed, but not much. The main fang comes off nearly 

 at a right angle and is short and sharp, a single spike only 

 occurring on the crown, and thus agreeing with the form 

 described by Langerhans. The bristles follow the typical 

 arrangement. 



A Spio (G) from the deeper water off St. Andrews Bay is 

 characterized by the rounded or bluntly pointed snout, the 

 mouth opening a short distance behind the tip. The two 

 tentacles are of moderate length and adhere firmly to the 

 snout. At least one eye occurs on each side at the inner 

 base of the tentacle. The body is about half an inch in 

 length, somewhat rapidly tapered anteriorly, and more gently 

 posteriorly, Avhere it ends with cirri (only one of which is 

 present). The dorsal surface is somewhat flattened, the 

 ventral rounded. No branchia? are visible. The dorsal 

 lamellae are much developed and foliaceous in front, espe- 

 cially the third. Winged hooks make their appearance 

 about the 15th bristled segment ; they are slender, slightly 

 tapered after the backward curve to the throat, have a main 

 fang and a single spike on the crown. The dorsal lamellse 

 diminish greatly after the 15th segment, and in the posterior 

 half form small conical processes behind the setigerous 

 papilla. The ventral division in the same region is repre- 

 sented by the hook-papilla. The dorsal bristles are capillary, 

 finely tapered, and curved backward. Posteriorly they 

 greatly increase in length and are very slender. 



A species swarming in sand near low-water mark, St. An- 

 drews, and also dredged in 2 fathoms off Syinbister Harbour, 

 Shetland, has been provisionally named >S/?io ^«^^yi *. The 

 head terminates anteriorly in a rounded point — the centre of 

 a cone formed by the bucc;d ^egment. A minute black eye 

 occurs on each side of the median ridge, which ends in an 

 occipital papilla or tentacle posteriorly. The body is about 

 an inch in length, proportionally short and stout, a little 

 tapered anteriorly, and more so posteriorly, where it ends in 

 two broadly ovate cirri. The branchiae are conspicuous 

 from the 1st foot to the end. The dorsal lamella of the 

 1st foot is elongate-ovoid, with about a third of the dorsal 

 f dge free, the rest fused to the base of the branchia, the 

 lower margin trending gently to the body-wall. The dorsal 

 bristles arc of moderate length, curved upward and slightly 



• Niiiued after the founder of the St. Andrews Mariue Laboratory. 



