26 Piof. M'Tntosh's Notes from the 



veiitially anteriorly, and grooved posteriorly^ where ilie seg- 

 ments are marked by deep dorsal furrows. Following the 

 buccal are two somewhat narrow segments, each having a 

 setigerous process, and a glandular ventral scute or belt. 

 Ten scutes follow, the last separated by an interval. Then 

 the median ventral groove continues to the posterior end. 



Seventeen setigerous processes occur on each side carrying 

 pale golden bristles, and they are conical Avhen view^ed from 

 the dorsum, obliquely truncated at the tip when viewed 

 laterally. They commence on the third segment. The 

 bristles are in two series, a longer and a shorter. The 

 former are long, slender, translucent bristles, the free part 

 being apparently cylindrical to the commencement of tiie 

 wings, but the shaft is actually slightly enlarged till it almost 

 reaches its base in the tissues. The ti]) is comparatively 

 short, finely tapered, and the wings are distinct. The shorter 

 forms have shafts very slightly less than the foregoing, and 

 only their ends project beyond the skin, the wings com- 

 mencing at once and dilating into broad expansions, whilst 

 the short but finely tapered tip is curved at an angle. 



The rows of hooks commence on the seventh setigerous 

 segment, though in the form examined it was on the eighth 

 counting from the first (small) setigerous papilla. The 

 anterior hooks somewhat resemble those of Pista cristata, 

 with three or four teeth above the main fang, a posterior 

 outline convex toward the crown, then a hollow, and a pro- 

 jection above the posterior long ligament. The deep base is 

 convex inferiorly, and the anterior outline has a process 

 under the main fang. The figure of Malmgren is incomplete, 

 though it is correct as far as it goes ; that of Ssolowiew is 

 not well finished. 



The crowns of the posterior hooks are higher than those in 

 front, and are moi'e nearly in accordance with Malmgren^s 

 figure, five or six small teeth being above the main fang, 

 and the posterior basal process is represented only by a short 

 fragment. 



In the widely distributed Thelepus cincinnatus, O. Fabiicius, 

 the sixteenth species, the dorsal cepluilic collar is well- 

 marked, and has posteriorly a series of eye-specks, wdiilst 

 the external rim passes downward to the ventral surface and 

 joins the lower edge of the supra-oral arch, A comparatively 

 short space thus intervenes between the two sides ventrally, 

 a space w^hich is occupied by the inner tongue-shaped process 

 and the short fillet of the post- oral segment. The supra- 

 oral arch is moderately prominent, but limited in extent, and 



