47 42 Proceedings of the Royal Irish Academy. 



regards the double row of glands on the dorsum of each segment, the alter- 

 nation in length of the dorsal cirri, the shape of the head and eyes, the Irish 

 specimens agree with those already described. Marenzeller states that the 

 opening of the proboscis is crowned with 30 teeth, of which 8-10 are some- 

 what larger than the others, each large one alternating with 2 or 3 smaller 

 ones. Langerhans gives 30 teeth to the proboscis, 3 of which are very 

 much larger than the rest. In the Irish specimens there are 30 teeth, of 

 which 4 are very much larger than the rest. Between each pair of large 

 teeth there are 6 or 7 smaller ones. Two of the small teeth overlap each 

 large one (fig. 10). In the structure of the teeth, therefore, the Irish specimens 

 agree fairly closely with those found by Langerhans at Madeira, and differ 

 considerably from Marenzeller's specimens from the Adriatic. 



It is possible that the Irish specimens represent a distinct species, or that 

 they are identical with the Madeira species, but distinct from the one found 

 in the Adriatic. An examination and comparison of specimens from the three 

 localities would be necessary to decide this point, and for the present they 

 may remain as a variety of A. brachyceijhala. 



Habitat. — Blacksod Bay— Dredged in 4-6 fms. Clew Bay — Dredged 

 in 18 fms. 



Distribution. — Madeira ; Adriatic. 



Autolytus ehbiensis de Saint-Joseph. 



1886. Autolytus ehbiensis. De St.-Joseph, p. 228. 



Specimens with male buds were found in September. This species is 

 fairly common in dredged material, or on the shore in Laminaria roots. 



Habitat. — Blacksoj) Bay — Found on the shore on 3 occasions. 

 Dredged on 8 occasions, in 1-8 fms. Clew Bay — Dredged 

 on 5 occasions, in 2-28 fms. Ballynakill Habboue — 

 Dredged on 2 occasions, in li-4 fms. Bofin Haeboue— On 

 bottom of a boat. 



Distribution. — Dublin Bay ; Torquay ; north coast of France. 



Autolytus punctatus de Saint-Joseph. 



1886. Autolytus punctatus. De St.-Joseph, p. 233. 



This species is comparatively rare, and has only been found elsewhere on 

 the north coast of France. 



Habitat. — Blacksod Bay — In Laminaria roots from the shore. 

 Distribution, — North coast of France, 



