ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 169 



ventrally (in adaptation to the habitat), by having the front of the 

 carapace straight and broad in the female, and by the approximately 

 square outline of the carapace. The other extreme is P. globosus. 



Digestive System of Schizopods.* — Charles Gelderd has studied 

 Macromysis flexuosa and related forms. The fore-gut has the same 

 general structure as that of Decapoda and Edriophthalmia, and contains 

 similar pieces. These are dealt with in detail. The author describes 

 the acinous " salivary glands," the hepatopancreas, and the structure of 

 the gut generally. In each long tube of the digestive gland there is an 

 irregular longitudinal ridge projecting into the lumen. It seems to be 

 characteristic of Schizopods. 



New Copepod from an Ascidian.t — E. Chatton and E. Brement 

 describe the female of Enteropsis roscoffensis sp. n. found in Styelopsis 

 grossularia. The pereiopods i.-iv. are uniramous ; the antennas are 

 vaguely two-jointed, the last joint dagger-like ; in these and other 

 respects it differs from related species. 



Annulata. 



Albuminoid Reserves in Annelids. $ — Max Kollmann describes 

 peculiar adipose cells in the perivisceral fluid of Spirographis and other 

 Polychsets. They contain, besides fat, numerous granules of albuminoid 

 substance, more or less acidophilus. They probably develop from 

 leucocytes, and they bear a close resemblance to the adipose cells in 

 insects. It is highly probable that they are of the nature of reserves. 



Musculature of OweniaJ — Leo Zurcher has made a histological 

 study of the musculature in this Chaetopod. In the body-wall he 

 describes (1) the external epithelium ; (2) a connective tissue limiting 

 membrane (circular musculature in the thorax) ; (3) longitudinal muscu- 

 lature, composed of elongated pointed cells, differentiated into medullary 

 space and contractile cortex with spirally disposed fibril-columns ; and 

 (4) a glandular peritoneum. 



The blood-vessels have a connective-tissue intima and a circular 

 muscular layer. The sinus between the intestinal epithelium and the 

 circular muscle layer is lined with connective-tissue membranes. The peri- 

 toneum of the splanchnopleure is epithelial in two places — on the muscu- 

 lature of the vascular membrane in front of the second septum, and on 

 the neural mesentery in the genital region. Elsewhere it is reduced to a 

 few nuclei, apposed to the muscular layer. The vesicular connective- 

 tissue is not a peritoneum, but an aggregate of degenerate lymphocytes. 



Pelagic Phyllodocidae of Irish Coasts. || — E. Southern describes 

 some members of the sub-family Lopadorhynchidae, collected at consider- 

 able depth off the west coast of Ireland. No species of this small and 

 imperfectly known group has hitherto been recorded from the British 



* La Cellule, xxv. (1909) pp. 7-70 (4 pis.). 



t Bull. Soc. Zool. France, xxxiv. (1909) pp. 196-203 (5 figs.). 



: Tom. cit., pp. 149-55 (3 figs.). 



§ Jenaische Zeitschr. Naturwiss., xlv. (1909) pp. 181-220 (6 pis. and 4 figs.). 



i| Sci. Invest. Fisheries, Ireland, iii. (1908) published 1909, pp. 1-11 (3 pis.) 



April 20th, 1910 N 



