ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
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double row in the anterior somites. The presence of a closely investing 
gelatinous tube, taken in connection with certain internal characters, 
seems to point to an affinity between Arenicola and the Chlorhaemidae. 
Wiren has described in adult specimens a continuous perienteric 
sinus ; this is not to be found at the larval stage. In this fact the 
author finds a support for the view he has already propounded that it 
is improbable that the perienteric sinus of certain earthworms is, as 
some have held, a primitive feature. In Arenicola , at any rate, the 
sinus of the adult is preceded by a network. In the body-wall the sub- 
epidermic tissue described by Wiren has not yet made its appearance. 
In place of the great wide nephridial sac of the adult there is, in the 
post-larval stage, quite a simple narrow tube ; this runs nearly in a 
straight line from the nephridiopore to the nephrostome ; this last seems 
to be perfectly simple, and as it has no lips we cannot speak of a funnel 
in the usual sense of the word. The alimentary tract has the same 
regions as in the adult. 
Polychaeta of North Carolina.* — Dr. E. A. Andrews gives a list of 
57 Polychaetes from Beaufort, N.C., but he is convinced that this gives 
no real idea of the richness of the fauna. Harmothoe aculeata is a new 
species, but is a common form. Accetes lupina Stimpson forms peculiar 
tubes which call to mind those of Cerianthus. Procersea tardigrada 
Webster seems to be a Syllid in which there is a strong tendency to the 
acquirement of a regular metameric marking ; this does not, however, 
coincide with the metamerism of the somites, but tends to follow a special 
law. Eunice ornata sp. n. is found not uncommonly in Sponges. Dio- 
patra cuprea A. & E. is obviously in the habit of reproducing its 
anterior or posterior end, and this appears to be almost a necessity from 
the worm’s custom of protruding itself from its tube. D. magna sp. n., 
is one of the largest Annelids on the East American coast. Ophelina 
agilis sp. n. is common; Polydora commensalis sp. n. was found in 50 per 
cent, of all the Ilyanassa- shells inhabited by the small Hermit Crab, 
Eupagurus longicarpus , and overgrown by colonies of Hy dr actinia. 
Axiothea mucosa sp. n. is one of the most abundant Annelids found at 
Beaufort; it forms a Y-shaped tube, one arm of which is closed at its 
end by the egg-mass, while the other gives the Annelid access to the 
water. Though placed in Quatrefages’ genus Petaloproctus, P. socialis 
sp. n. would probably better find a place in a new genus ; it is a 
common form which constructs thick coarse tubes of sand, often cemented 
together in groups and convoluted a few inches below the surface of 
the sand. Ammochares sedijicator sp. n. is not uncommon in areas 
where they are scarcely uncovered by the tide ; the excrement is dis- 
charged in the form of cylindrical masses, half the length of the body, 
and composed of excessively fine sand held together by mucus. Loimia 
turgida sp. n. is found under stones along the shore. Four of the other 
species enumerated are new to America. Various larval forms were 
also observed. 
Polychaeta from Deep Water off Ireland.! — Miss F. Buchanan has 
a note on the deep-water Polychaetes collected during the Royal Dublin 
* Proc. U S. Nat. Mus., xiv. (1892) pp. 277-302 (7 pis.). 
t Sci. Proc. Roy. Dublin Soc., viii. (1893) pp. 167-79 (1 pi.). 
