10 Cod. 
XVI. CCELENTERATA. 
External morphology of Gorymorpha ; Carlgren (22). 
Grafting Experiments on Hydromedusae ; Hargitt (53). 
Histology. Cell-membranes and cell-plates, pp. 391-400, Hoffmann 
(66); Pennaria tiarella McC., Smallwood (119). 
Metamorphosis. Hydroid phase and Medusa buds of Margelopsis 
haeckelii Hartl., Hartlaub (56) ; origin and development of the Medusa 
in Pennaria tiarella McC., Smallwood (119) ; Stylactis hooperii Sigerfoos, 
free-swimming mouthless Medusa distributes the sexual products but 
does not nourish them as they are already fully matured, Sigerfoos (118) ; 
Corynitis aqassizii McCrady and its Medusa, Gemmaria qenmiosa McCrady, 
p. 354, Murbach (96). 
Oogenesis. Myriothela and Tubularia , Labbe (72 & 73) ; Pennaria 
tiarella McCrady, Smallwood (119). 
Periodical appearance of Halecium halecinum (L)., p. 9; Beten'court 
(12). 
Phylactocarps formed by nematoclades in Lytocarpus grandis (Clarke): 
Versluys (130). 
Regeneration and regulation in Hydra viridis, Rand (106), Morgan 
( 95) ; loss of ectoderm on exposure to arc-light, followed by regeneration, 
in H. viridis , Tower (125) ; regeneration in the medusa, Gonionemus 
vertens , Morgan (94), Hargitt (53). 
Reparation. Tubularia ; Driesch (30 p. 50; & 31). 
Distribution. 
Iceland ; Aidiscus pulclier a new Gymnoblastic Hydroid, Saemundsson 
(112). 
North Sea ; Hydroids, distribution of 30 genera and 50 determined 
species in German waters, Hartlaub (55). 
Atlantic etc. Prince of Monaco’s Medusee, Maas (84). 
Norway ; Hydroids, Bonnevie (15). 
Sweden ; Clava glomerata, Lonnberg (83). 
Calais ; Hydroids of Pas-de-Calais, enumeration of 56 species. Beten- 
court (12). 
Schwentinemundung; Kuhlgatz (71). 
Fiji ; Medusas, Agassiz & Mayer (2) ; point out that all genera, 
except two Rhizostomae, are represented in the Caribbean Region; 17 
species closely resemble Caribbean species ; 6 species are common to the 
Pacific and Atlantic Oceans, pp. 158 & 182, 183. 
Funafuti ; Hydroids, Whitelegge & Hill (134). 
Alaska ; Hydroids, Nutting (99). 
Puget Sound ; Hydroids, 30 species, Calkins (18), Nutting (99). 
Long Island Sound ; Stylactis hooperii , Sigerfoos (118). 
Wood’s Holl, Mass.; Hypolytus peregrinus , Murbach (96). 
Tortugas ; Pandea violacea found also at Fiji, p. 160, Agassiz & Mayer 
( 2 ). 
Antilles; Calyptoblastic Hydroids, Versluys (130). 
Systematic. 
Aglaophenia clavicula , n. sp., Funafuti, p. 373 ; Whitelegge & Hill (134): 
A. tridentata, n. sp., 11 metres, pp. 47-49 ; cylindrata , n. sp., 40 
metres, pp. 49-51, West Indies ; Versluy*s (130). 
A.pourtalesii (V errill) = GladocarpuspourtalesiiY errill, Norway; Bonneyie 
( 15 > 
Aglaura pnsmatica, Maas, p. 165, Fiji; Agassiz & Mayer (2). 
Aidiscus, nov. gen. pulclier , n. sp., allied to Ectopleura. Hab. Reykjavik 
(in litore saxatili). Hydroid and Medusae; Saemundsson (112). 
