6 XVI. Coeleiiterata. Hydroidea und Acalephae 



Bourne, CI. C. Ctenophora. — Ray Lankester: Treatise on Zoology. 

 1900. 



Von Hubrecht (3) p. 154 — 156 bei Erörterung der Verwandtschafts- 

 verhältnisse der Coelenteraten verwendet. Bourne betrachtet u. a. 

 die AehnKchkeit zwischen Ctenaria und den Ctenophoren als eine ganz 

 oberflächliche. 



Breitfuss, L. L. Expedition für wissenschaftlich-praktische 

 Untersuchungen an der Murman-Küste : Zoologische Studien im 

 Barents-Meere auf Grund der Untersuchungen der Expedition: Vor- 

 läufige Berichte : 1. Liste der Fauna des Barents-Meeres p. 1 — 12. St.- 

 Petersburg 1904. 



Hydrozoa : 13 Arten Hydroidea, 22 Medusae. Scyphozoa, Acalephae 

 5 Arten. 



Browne, Edward T. Hydromedusae, with a revision of the 

 Williadae and Petasidae. — The Fauna and Geography Maldive and 

 Laccadive Archipelagoes Vol. II (Part III) p. 722— 748 t.54— 57. 1904. 



Antho-, Lepto-, Tracho-, Narcomedusae. (Siphonophora p. 742 

 — 745) : a welcome addition to our knowledge of the Hydromedusae of 

 the Indian Ocean. Introduction. Summary: In the revision of the 

 Williadae I have used for the generic character the number of 

 radial canals which leave to the stomach, and for the specific character 

 the branching of the canal System. There are now two genera, namely, 

 Proboscidactyla and Willia. The genera Dyscannota and Willitta 

 of Haeckel are no longer needed. In three species of the Williadae 

 I have found that the circular canal is absent and that its place is 

 occupied by a solid chord of endoderm cells. The radial canals are in 

 direct communication with the basal bulbs of the tentacles. — Meso- 

 nema pensile. — The revision of the genera belonging to the Peta- 

 sidae has not involved any alterations in generic names. The 

 structure of the sense organs has been taken for the character of the 

 two subfamilies, Petnachnidae and Olindiadae, instead of the ab- 

 sence or presence of centripetal canals, which was used as the sub- 

 family character by Haeckel. The genera Aglauropsis and Gossea 

 have been placed among the Olindiadae, and so have following additional 

 genera, Gonionemus, Gonionemoides, and Vallentinia. The structure 

 of the tentacles has been used as the principal character of the genera 

 belonging to the Olindiadae. — A new genus, Amphogona, has been 

 instituted for Pantachogon apsteini of Vanhöffen. Der erste Fall von 

 Hermaphroditismus bei Acraspeden. 



Carazzi, Dav. Ricerche embriologiche e citologiche sull'uovo 

 di Myzostoma glabrum Leuckart. — Monitore zoologico italiano Vol. 15 

 (Anno 15) 1904, p. 62—78 und 87—100. 



Cenni storici. Sülle fasi sessuali e sui maschi complementari. 

 Sulla penetrazione dello spermatozoo nell'uovo. Struttura dell'uovo 

 maturo. La segmentazione dell'uovo. Considerazione generali. Hier 

 nur der vielen Beziehungen zu anderen Evertebraten (Ctenophoren z. B.) 

 wegen zitirt. K. 



I 



