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BULLETIN OF THE MUSEUM OF COMPARATIVE ZOOLOGY. 
EXPLANATION OF PLATES. 
PLATE I. 
Hippurella annulata, All. 
Aglaophenopsis hirsuta, n. g. & s. 
Cryptolaria abies, All. 
Gonosome of 4. insignis, n. s. 
Hydrotheca of Cladocarpus compressus 
Hydrotheca of A. insignis, n. s. 
Gonosome of C. abies, All. 
Denticled stem of C. compressus, n. s. 
Nematophores on the jointed appendage of 4. hirsuta. 
PLATE II. 
Callicarpa gracilis, n. g. and s. 
Gonosome of C. gracilis. 
Gonophore of Aglaophenopsis hirsuta. 
Section of gonosome of H. annulata, All. 
Side view of the same. 
Hydrotheca of C. gracilis. 
Section of the gonosome of C. gracilis. 
Hydrotheca of H. annulata, All. 
PLATE III. 
Cladocarpus compressus. 
Gonosome of Pleurocarpa ramosa, n. g. & s. 
Hydrotheca of Antennopsis ramosa. 
Base of a pinna of Plumularia caulitheca. 
Hydrotheca of Plewrocarpa ramosa. 
Hydrotheca of 4. gracillima, n. s. 
Hydrothecæ of 4. minuta, n. s. 
Gonosome of 4. gracillima. 
PLATE IV. 
Ocyroé maculata, Rang. (side view). 
O. maculata (oral lappets seen more in profile). 
0. maculata (aboral view of one quarter of the medusa). 
O. maculata (the oral lappets are closely drawn together). View from 
same side as Fig. 1. 
Dodecabostrycha dubia, B 
T. 
