132 Prof. Mcintosh's Notes from the 



Grube, tliougli the latter conclusion is unlikely. The body 

 is 2-2*5 mm. long, of au orange colour; thoracic seg- 

 ments 8; dorsal bristles of two kinds ; uncini pectiuiforra ; 

 tube siuuous and calcareous, in crusting Zostera and other 

 marine structures. There is no diagnostic feature in this 

 description. 



S. cedificatr'hv. Body dull orange, 2-2-5 mm. long, seg- 

 ments 45-50 ; branchise 4, white, with pale granular tubercles 

 externally ; no eyes ; thoracic segments 9 ; collar-bristles 

 geniculate, cuspidate at the base of the wings ; rest of the 

 segments have subulate bristles with wings, others pectinate ; 

 falciform ; hooks small, multidentate : tube capillary, densely 

 glomerate, and intricate. 



Cunningham and Ramage * (1887), while giving no details, 

 have a figure of an adult example and a larva of FUograna 

 iinplexa. The adult has eight pairs of anterior bristles, a 

 pair of eyes, and opercula on the branchise. The larva has 

 three pairs of bristles, two large eyes, and a prominent 

 prototroch. 



Ehlers t (1887) examined a form from the Tortugas 

 which he named Filigrana huxleyi ; having the general 

 structure described by previous authors, with ova in the 

 posterior segments (12-20), and in the case of a nurse-stock, 

 from the seventh posterior segment of which a bud of six 

 thoracic and seven abdominal segments arose, there were 

 no re))roductive elements. Each branchial filament, as in 

 FUograna dysteri, ends in a pear-shaped, cellular, flattened 

 swelling with palpocils. He considers such an organ may 

 be connected with food-supply, since he found a Nauplius 

 amongst the pinnae. The stomachs, however, of most 

 examined in Britain had only such objects as currents 

 supplied, and in those from deep water Coccoliths Avere 

 common, and so with many foreign forms. Ehlers states 

 that Huxley describes certain warts on the branchise of his 

 species, but they were not present in the American form. 

 The homologies of the terminal enlargements with opercula 

 or eyes [e. g. in Brancldomma), as Langerhans considered in 

 Scdmacina incriistans, are referred to. Ehlers gives a figure 

 of the characteristic collar-bristles which differs from any- 

 thing hitherto seen in the group, in so far as it has only 

 six large serrations to the basal division of the "wing, no 

 hiatus, and a long, smooth, tapering tip, Further, no bristle 



* Trans. Roy. Soc. Ediri. vol. xxxiii. p, 673, pi. xlv. fig. 35. 



t " Report on the Annelids of the ' Blake," " p. 314, Taf. 56, figs. 4-9. 



