18 Gcel. 
XVI. CtELENTERATA. 
Aglaophenia myriophyllum ; Robertson (176). 
Conopora tenuis , Moseley ; Alcock (3). 
Corynidce ; Hornell (118). 
Hydra ; Grenacher (84), Garbini (73), Haller (93), Wetzel (210), 
Richard (175). 
Hydractinia , mentioned by Swammerdam ; Scherren (187). 
Obelia geniculata ; Hornell (117). 
Perlgonimus repens } Wright ; Hartlaub (98). 
Sertularia pumila ; Hornell (119). 
Stauridium production , Wright ; Hartlaub (98), 
Stromatopora is stated to be one of the constituents of Prisciturben , 
Kunth. ; LinpstrOm (138). 
Rhabdophora. 
. The recent additions to our knowledge of the structure of the Graptolites are the 
most important that have been made for many years. 
Collins (47) figures a graptolite ( Cladochonus ?) from the Blackhead, 
Cornwall, 
Holm (113) was able to demonstrate the chitinous polyparies of several 
species of Didymograptua ) Tetragraplus } and Phyllograptm. 
Marr (144) : Graptolites of Skiddaw slates. 
Nicholson & Marr (158) : Phylogeny. 
Perner (168) : Microscopic structure of Monograptua and Uetiolilea. 
Ruedemann (180) on the structure, and (181) on the development of 
Diplograptua. 
Sollas (191) : Minute structure of Monograptus priodon. 
TOrnquist (199) elucidated details of the structure of Climacograptus 
scalar is by grinding, and in (200) he defines the term “ theca.” 
Wiman (213, 214) : Diplograptidas , Lapw., Monograptus } Geinitz. 
[See also GOuiou (90), Hall (92), Pritchard (178), TOrnquist (198).] 
Siphonophora. 
Bedot (12) describes a Velella larva ( Rataria ), with two buds, a 
gastro^oid and a tentacle on the oral pole. 
Chun (45) has produced a monograph on the Monophyulce of the 
Canary Islands. The species, which are described at length, are 
Monophyes brevitruncata , M. irregularis , Sphaeronectcs gracilis , Aluggiaea 
hocJiii , Doramasia picta ) Halopyramis adamantina. 
Goto (78) finds that the bell nucleus of Physalia is formed by the 
immigration of interstitial cells from the ectoderm ; in (79) he notes the 
protoplasmic connection of lasso-cells in Physalia. 
Mayer (147) refers Rhbophysa eysenhardtii , Fewkes, to Cannophysa , 
and describes C. filiformis. 
Pictet (171): Spermatogenesis. 
Schneider (188) : Nematocysts. 
Willem (212): The structure and phenomena of absorption exhibited in 
the tentacles of Apolemia uvaria , Esch. 
