184 SUMMARY OF OUBEBNT RESEARCHES RELATING TO 



Hydroids of Eastern Tropical Pacific* — S. P. Clarke reports on 

 the Eydroids collected by the ' Albatross' (1904-5). The collection is 

 surprisingly small, including only 12 species. At 112 stations no 

 Eydroids were obtained. The following - are new — Pennaria pacifica, 

 Gampanula/ria obliqua, Obelia striata, Campanulina denticulata, and 

 < 'ladoearpus (//stomas. It is interesting to find that two of the species, 

 Thiuaria tubal if or mis and Zygophylax chazalei, were hitherto known 

 only from the Atlantic side of the isthmus of Panama. The label in 

 the bottle with Campanulina denticulata records a depth of 2*45 

 fathoms, something unusual, but not unequalled for Hydroids. Alhnan 

 records Stylactis vermicola and 31onocaulis imperator from 2900 fathoms. 



Hydroids from North Side of Bay of Biscay/]-— E. T. Browne 

 reports ou a collection of 37 species, including two new species Bimeria 

 arborea and B. biscayana, and several rare deep-sea forms. 



Pelagic Larvae of Actiniaria.J — Angelo Senna reports on those 

 collected on the voyage of the ' Liguria ' in 1903-5, under command of 

 the Duke of Abruzzi. In the family Cerianthidae he describes four new 

 forms of Dactylactis ; in the Zoanthidae, three larvae of Zoanthella and 

 several of Zoanthina. The structure of these forms is fully discussed. 



In the same connection we may note the account given by 0. Carl- 

 gren § of northern forms : Arachnactis and other larvae of Cerianthidae ; 

 the larva? of Peachia hastata parasitic on Medusae ; and various pelagic 

 forms, e.g. of Sagartia viduata, Zoanthina and Zoanthella. 



Halcampella ostroumowi.|| — Th. Wyragevitch describes this new 

 Actinian from the Black Sea. It is cylindrical, vermiform, delicate, 

 semi-transparent, with 12 longitudinal stria 1 , with 24 tentacles. It 

 changes its shape incessantly and rapidly. Eight mesenteries reach the 

 oesophagus, but only four of these are fertile. The author found no 

 acontia, no sphincter, and no septostomes. It seems likely, though not 

 certain, that the young stages occur within the gastro-vascular system 

 of Aurelia aurita, and some facts bearing on this question are recorded. 



Recent Madreporaria of the Hawaiian Island and Laysan.^f — T. 

 Way land Vaughan deserves to be congratulated on his magnificent mono- 

 graph of these Madreporarians. He discusses the classification, the species 

 problem, the distribution and the factors determining it, the faunal 

 affinities of the Hawaiian forms, and then proceeds to a systematic 

 account with special attention to the morphology of the hard parts. 

 The photographic plates are of great excellence. 



Phellia murocincta.** — Chas. L. Walton found this beautiful little 

 sea-anemone near St. Ives, under stones in a small dark cave, along with 



* Mem. Mus. Comp. Zool. Harvard, xxxv. (1907) pp. 1-18 (15 pis.). 



f Jouru. Mar. Biol. Assoc, viii. (1907) pp. 15-36 (2 pis. and 1 fig.). 



X Raccolte Planctoniche (R. 1st. Stud. Sup. Firenze), iii. (1907) pp. 81-198 

 (4 pis., 37 figs.). 



§ Nordisches Plankton (Brandt and Apstein) lief v. (1906) pp. 65-89 (10 figs.). 



|| Bull. Acad. Imp. Sci. St. Petersbourg, xxii. (1905, received 1907) pp. 85-98 

 (14 figs.). U Bull. U.S. Museum, No. 59 (1907) pp. 1-222 (96 pis.). 



** Journ. Mar. Biol. Assoc, viii. (1907) pp. 47-8. 



