578 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Bpecies of Eucypris and Candona are described. In the case of Eucypris 

 affinis hirsute Fischer the males were found, which is rare amo 

 <\ pn'<k .Males were also found in Eucypris crassoides sp. n. Apart 

 from these two cases and Cyprinotus incongrums, males arc known only 

 in Southern regions. 



Armulata. 



Uncini of Annelids.*— M. Caullery has made a minute study of the 

 uncini of the Terebellid genus Pista, which bear numerous denticulations 

 at the apex and an inferior stalk (the so-called " Muskelforsatz "), more 

 or less prolonged. For taxonomic purposes it is essential to examine 

 methodically the uncini of the various segments of the thorax, especially 

 in front, where highly differentiated uncini take the place of the setas 

 properly so called. The uncinus corresponds to the extremity of a 

 hooked seta, such as is found in Clymenise, Capitellids, and Spionids. 

 The stalk (tige) of the thoracic uncini is a vestige of the handle (hampe) 

 of the primitive seta, and not a portion newly differentiated in connexion 

 with the insertion of muscular fibres. 



Pacific PolychaBts.f— Aaron L. Treadwell reports on the Pacific 

 Polychfets of the zoological museum of the University of California, and 

 describes twelve new species — Panthalis pacifiea, Nereis notomacula, Spio 

 acuta, Scolecolepis alaskensis, Polydora californica, StreUosoma crassi- 

 hranchia, Trophonia minvta, T. inflata, OpMina magna, 0. mucromta, 

 Laonome ocidifera, and Branchiomma disparoculatum. The author also 

 describes % two new Syllids— TrypanosyUis adamanteus sp. n. and the 

 Sacconereis phase of Autolytus varius sp. n., both from San Francisco 

 Bay. 



Onuphidae of North Sea.§— F. Eulenstein describes Onuphis con- 

 chylega M. Sars, 0. quadricuspis G. 0. Sars, and Hyalinmcia tubicola 

 0. F. Miiller, and pays particular attention to the jaw apparatus, the 

 three sets of jaw muscles, the probably sensory neck-organ— a flat, 

 strongly ciliated, narrow band below the posterior margin of the head- 

 lobe. He also describes the oogenesis and the occurrence of nutritive 

 cells which are to be regarded as abortive ova. In the ripe males there 

 are such crowds of sperm-cells in the sexual segments that all the 

 ccelomic cavity, even into the parapodia, is filled, and interesting sperm- 

 filled diverticula bulge into the lumen of the gut. 



Pelagic Annelids of Japan. || — Akira Izuka reports on nine species 

 of Alciopidre and Tomopteridte from Japanese waters. His collection 

 includes Vanadis grandis sp. n. with no fewer than 688 segments, 

 •Ins mm. in total' length, 1'3 mm. in breadth anteriorly, tapering to 

 1 1 • s mm. in about the 500th segment. The bright red eyes are relatively 



* Bull. Soc. Zool. France, si. (1915) pp. 68-78 (2 figs.), 

 t Publications Univ. California (Zool.), xiii. (1914) pp. 175-234 (2 pis.). 

 + Publications Univ. California (Zool.) xiii. (1914) pp. 235-8 (7 figs.). 

 § Wiss. Mearesuntersuch. Kiel, xvi. (1914) pp. 131-72 (2 pis. and 8 figs.). 

 U Journ. Coll. Sci. Imp. Univ. Tokyo, xxxvi. (1914) Art. 5, pp. 1-14 (1 pi. and 

 1 fig.). 



