Explanation of Plates. 95 



Plate 21. 

 Mesolecitha linearis gen. et sp. nov., from Teuthis cceruleus. 



?!.' 17 °" Ventro-lateral View ' life > detaiIs added : length 4 .cc mm 



Fig. i 7 i. Nearly g horizontal view of ovary, shell-gfand, 4 filiform seminal 



Fig t* 9 SacrfttJ? ? ' ,' made Up from ^ or 4 horizontal sections. 

 J?lO. 172. Sagittal section of cirrus, seminal vesicle, and metraterm made up 

 irom 3 or 4 sections. l 



Barisomum erubescens gen. et sp. nov., from Pomacanthus arcuatus. 



Figs. 173-173C Sketches from life showing different specimens in various 

 positions. Intestines dark brown or black, reproductive organs 

 generally white, ground-color pink. organs 



p!r' II 3 ' Y Gn ^ al ViGW ' lateral edges rolled under ! ^ngth 2.5 mm 

 Jig. 173a. Another, same view; length 3.25 mm -3 mm. 



Jig. 1736. Lateral view; length 3.25 mm. 



Fig. 173c. Dorsal view; length 3.50 mm 



Fig. i 74 . Posterior end [.ventral view; diameter i. 5 mm. The end has been 



cut, the lateral edges unrolled and spread apart. At * the intes- 



Fig. 175. Transverse section, showing prostate, seminal vesicle, etc : diame- 



ter 1.26 mm. ' 



p!r' lit' Cirrus-pouch, prostate, etc., ventral view, edge turned under 

 Fig. 177. Transverse section near posterior end, showing anlstomosTs of 

 intestinal rami (this seems to be exceptional), ventral excretory 

 pore and excretory vessel. Diameter 0.63 mm. ' eXCretory 



Plate 22. 

 Barisomum erubescens, continued. 



Fig. 178. Transverse section showing intestinal diverticula, strong transverse 



muscles, duct of prostate (no prostatic cells shown in this sec! 



tion), metraterm, and cirrus. Thickness of body at this point 

 Pro * t °- 22 mm - m ' Cells su rrounding metraterm. P 



*IG. i J 9. Transverse section showing duct of prostate, vas deferens, uterus 



transverse muscles, etc. Thickness of body here 0.25 mm u>' 



uterus with ova cut transversely 

 *ig. 180. Transverse section showing fascicles of strong transverse muscles ; 



tnicKness 0.19 mm. 



Fir' ill' nf nSVer !t S ii Cti ° n ° f cirrus -P°uch; diameter 0.14 mm. 

 Jig. 182. Ovum with filaments 



Fig. 182a. Ovum without filaments, more highly magnified; length of ovum 



Fm T « n °-°37 mm; length of filament 0.30 mm 



Fig. 183. Dorsal view, life. The intestines, from the bifurcation to the level 

 of the point marked x were pink with clear granules; beyond 

 this point they were filled with dark-brown or black Wanular 

 contents. Length 2.6 mm. granuiai 



Himasomum candidulum gen. et sp. nov., from Pomacanthus arcuatus. 



Fig. 184. Ventral view, life details added folds of uterus diagrammatic; 

 r* lengtn 5 mm. k, muscular ridge. 



*ig. 184a. Ventral view of head; diameter 0.32 mm. 



Plate 23. 

 Himasomum candidulum, continued. 



Fig. 185. Ventral view of head of a different specimen from that sketched in 

 n S- 104a; diameter 0.50 mm. 



f!.' ll n*! VieW ° f , head with definite muscular ridge ; diameter o « mm 

 F... ,„. Do-ja. ™w of headof another s P eei m en wit! faint .S^; 



