21 Prof. M'Tntosh's Notes from the 



Jfacrochtrfa chricnj'uis, Sars, was procured between tide- 

 marks in Blacksod Bay, and dredged elsewhere on the West 

 Coast of Ireland {Sout/iern). The liead is dislinetly defined, 

 with a median process tothehlunt snont, and fonr large eyes 

 arranjTcd nearly transversely, tlic larger being external. 

 Two clavate palpi arise from the peristomial segment; fonr 

 pairs of somewhat clavate cirri from the next four segments. 

 The body is from 0"75 to 1 cm., somewhat spindle-shaped 

 in spirit, and densely covered with papillsc. Tufts of long 

 translucent bristles with minute spines occur dorsally, whilst 

 ventrally arc peculiar, flattened, large, transparent, and arti- 

 culated hooks and birtd tips. Its wide distribution is shown 

 by its occurrence in Norway and Madeira. lu general 

 aspect, at first sight, this form resembles a Chlorrcmid, and 

 it has a densely papillose skin and long, slightly spinose 

 bristles. The papillre agree in minute structure with those 

 of the Chlorremids, and mud and sand occur in the inter- 

 stices. The pigmented anterior region ends bluntly, with 

 a median process, somewhat like the central apparatus of 

 Stylarioides arenosa. The four eyes, arranged nearly trans- 

 versely, are very distinct. The example, kindly sent by 

 Mr. Southern, is mature, since the posterior region had 

 many large ova. The alimentary canal harboured Ojjalina 

 with two vacuoles. 



Marion and Robretzky * (1875) describe Heterocirrus 

 fronfifilis, Grube, from ^Marseilles, wliich, in many respects, 

 agrees with Macrochata. 



In the family of the Halelrainthidse is Notomastus rubi- 

 cnndvs, Kefersteiu, from fine clean sand, Plymouth {Allen). 

 The cephalic region is conical, with four larger eye-specks 

 and two groups of smaller eyes in front, a lobulated nuchal 

 organ on each side. Body 10 cm. long and 2 cm. broad, 

 vermiform, slightly enlarged anteriorly about the sixth seg- 

 ment, tapered posteriorly, and ending in a button-shaped tail, 

 all with neural parapodia and dorsal parapodial gills {Eisiy). 

 Genital opening at the fifth pair, and two in the sixth. 

 Thorax reddish, abdomen brownish or yellowish green, or 

 bluish green anteriorly. Bristles simple, winged, tapering; 

 eleven i)airs. Abdominal hooks with four teeth in lateral 

 view, from the thirteenth segment backward. Mature from 

 December till May. 



Keferstcin, who discovered this species at St. Vaast-la 



* Xnn. Sc. Nat. G* e^r. t. ii. p. G4, pi. viii. fig. 18, and pi. ix. fig. 18. 



