200 



j,: ure 4. Sphaeronella insignis n. £p. 



4 a. Female from Diastylis Icevis Norm., X 25. 



4 b. Male from Diast. Iwvls, X 25. 



4 c. Head of the female shown in fig. 4 a, X 160. Of the antennula on the right side of the 



figure only the base is indicated. 



4 d. Genital area of the female shown in fig. 4 a, X 186. 



4 e. Genital area of a female from Diast. comuta Boeck, X 173. 



4 f. Right antennula of the female from Diast. comuta seen from below, X 290. 



4 g. Distal part of right maxilliped of the female from Diast. comuta, X 290. 



PLATE X. 



1. Sphaeronella insignis n. sp. (continued). 

 1 a. Male from Diast. Icevis seen from left side, X 67. 

 1 b. Anterior part of the male shown in fig 1 a and seen from below, X 208 ; x. peculiar ring, 



y. lateral keel, v. frontal plate. 

 1 c. Male from Diast. comuta seen from below, X 160. 

 1 d. The same male seen from left side. 



1 e. Larva from Diast. comuta, X 151. The branches of the natatory legs omitted. 

 1 f. Front part of the larva shown in fig. 1 e, X 275. 

 1 g. Right maxilla of the same larva, X 350. 



1 h. Pupa from Diast. cornuta seen from below, X 207. 



2. Sphaeronella curtipes n. sp. 



2 a. Female, X 12. 

 2 b. Male, X 12. 



2 c. Ovisac, X 12. 



2 d. Head of female, X 192. The distal part of one maxilliped broken off. 



2 e. Genital area of female, X71; r. one receptaculum seminis — the other omitted. 



2 f. Male seen from below, X 51. 



2 g. Another male seen from left side, X 47. 



3. Sphaeronella affinis n. sp. 



3 a. Female, X 28. 

 3 b. Ovisac, X 28. 



3~c. Head of female^ X" 292. The hairs of the sub-median skeleton drawn only on the right side 

 of the figure. 



3 d. Genital area of female, X 146. Both receptacula seminis are indicated by dotted lines, and 



on the orifice of one a stalk of a spermatophore is attached. 



4. Sphaeronella Munnopsidis n. sp. 



4 a. Anterior half (namely: the head with the basal part of the antennas, and the larger part of 



the thorax with the first pair of legs and the basal portion of the three following pairs of 

 legs) of an adult female of Munnopsis typica M. Sars, the extended marsupium of which is 

 occupied by a female parasite with twenty ovisacs; many of the -ovisacs are seen through the 

 marsupial plates. The host is seen from below, X 14 /s- 



