107 
OVISACS. Of medium size (fig. 2), only slightly differing in size. 
LARVA. Only one specimen was found, it was hinged. Its cephalothorax is very 
broad and thick; the condition of the contents seems to indicate that the larva was developing 
into a male (comp. above, p. 60). Except in this clumsiness of shape, it agrees entirely 
with the larva of S. antillensis (pl. IL, fig. 2 e). 
HABITAT. The marsupium of Cheirocratus Sundevalli (Rathke) from Denmark; 
till now found only in four specimens. In one specimen were found: one adult female, two 
males and six ovisacs; in the second: one adult female and four pup; in the third: one 
adult female, one male and ten ovisacs; finally, in the fourth: one adult female, three males 
(one of them hinged to the base of the hindmost gill), six ovisacs and one larva hinged on 
the base, of the penultimate gill. 
REMARKS. The above-described difference in the hair-covering of the adult females 
appears remarkable to me. The female is larger, the male longer and more slender than in 
any of the following species. 
2. Spheronella Atyli n. sp. 
(Pl. Ul, fig. 3 a—3 b.) 
FEMALE. The largest specimen was ‘99 mm. in length, a specimen with seven 
ovisacs only ‘66 mm. Shape like the preceding species. Two specimens have been dissected, 
and the skeleton of their heads (fig. 3a) was found to want all the hair-tufts described 
in the afore-mentioned species, so as to leave only the tuft of hairs at the base of the 
maxillule, which is a distinguishing mark of the group. The trunk naked except a belt 
behind the head, which is covered with numerous, but exceedingly fine and short hairs. 
The genital area (fig. 3b) considerably broader than long, the solid chitine forms a ring, 
the larger part of which is rather broad, as well as a median list; anterior and posterior 
margins considerably concave; moderately long distance between the genital apertures; the 
caudal stylets are situated far from each other and at a long or very long distance from the 
area; genital area and its surroundings naked, except the usual, narrow arch outside each 
genital aperture. 
MALE. Length -22 mm. More like the male of S. chinensis (pl. III, fig. 1a) 
than like that of the preceding species. The body is clumsier than in this species, the 
median frontal plate is shorter, with converging margins and rounded anterior angles. The 
trunk-legs more slender than in S. elegantula; the terminal seta on the branch of the 
anterior legs shorter than the leg, that on the inner branch of the posterior pair slightly 
longer than the lee. 
OVISACS. Comparatively larger than in the preceding species, differing little from 
one another in size. 
14° 
