622 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Spirorbis lucidus Fleming. 



Edinburgh Encyclop., vol. vii, p. 68; Johnston, Catalogue of British Non-Parasiti- 

 cal Worms, p. 349 ; Malmgren, Annulata polychseta, p. 123. Serpula lucida Mon- 

 tagu, Test. Brit., p. 506 (t. Johnston). Serpula porrecta Fabricius, Fauna Groen- 

 landica, p. 37S (non Miiller). Spirorbis sinistrorsa Montagu, op. cit., p. 504 j 

 Gould, Invertebrata of Massachusetts, ed. i, p. 9, Plate 1, fig. 4, 1841. 



Deeper parts of Vineyard Sound, near the mouth, in 10 to 12 fathoms, on 

 hydroids and bryozoa ; off Gay Head, 10 fathoms ; off Buzzard's Bay, in 

 25 fathoms, on Caberea Mlisii ; off Block Island, in 29 fathoms, on Cabe- 

 rea; Casco Bay, 6»to 20 fathoms, on algae, &c. ; Bay of Fundy, 10 to 80 

 fathoms, on hydroids; Saint George's Bank, 30 to 60 fathoms. Green- 

 land ; northern coasts of Europe. 



This species forms small, translucent, glossy, reversed spiral tubes, 

 coiled in an elevated spire, the last whorls usually turned up, or even 

 erect and free. 



There are six branchiae, which are large and broad, with long, slender 

 pinnae, which do not decrease in length till near the end ; the naked tips 

 are short and acute. The operculum is sub-circular, somewhat obliquely 

 attached to the slender pedicel, which is about half as long as the ex- 

 tended branchiae, and enlarges rather suddenly close to the operculum ;. 

 the outer surface of the operculum appears nearly flat, and is covered 

 with adherent dirt. The collar is broad, with undulated and revolute 

 edges. The three fascicles of setae are long and slender. Ocelli two,, 

 conspicuous. The animal, in expansion, is usually much exsert from 

 the tube. Anterior part of the body bright red ; branchiae pale green- 

 ish ; their bases and posterior part of the body bright epidote-green. 



It is the species catalogued as S. porrecta (?) on pages 498 and 504. 



OLIGOCHJETA. 



Clitellio irrorata Yerrill, sp. nov. (p. 324.) 



Body very slender, the largest about 60 mm long, 0.75 mm in diameter, dis- 

 tinctly annulated. Head conical, a little elongated, subacute ; setse* 

 commencing on the first segment ; those on the anterior segments in 

 fascicles of two or three, very short, small, in length not one-third the 

 diameter of the body, more or less curved like an italic /, obtusely 

 pointed at the end; some of them are but slightly bent at the tip, others 

 are strongly hooked ; farther back there are three or four setae in the 

 iascicles, and they are somewhat longer, and two or more in many of 

 the fascicles are forked, the others simple, spinous, more or less curved; 

 in the upper fascicles posteriorly, and sometimes throughout the whole 

 length, there are two or three much longer, very slender, hair-like, flexi- 

 ble bristles, but these are often absent from most of the segments, 

 perhaps accidentally. The intestine is voluminous, slightly con- 

 stricted at the articulations ; two bright red blood-vessels, distinctly 

 visible through the integuments, run along the intestine, one above 

 and one below, following its flexures, without contractile lacunae. 



