115 
between antenna 2 and tlie first pereiopod and is quite un- 
articulated. The 5 pairs of pereiopods have about the same form 
as those in Zonophryxus Grimaldii (Koehler, Buil. Inst. Océanogr., 
Monaco No. 196, 1911, fig. 13, p. 17); they seem to have but 5 
joints, and the 4th joint is quite globular. Only two pairs of in- 
cubatory plates are visible, and it has been impossible without 
dissection to examine if there are more plates. The hind-plates 
have the usual crest, each with about 14 teeth; inside the teeth 
some embryos are visible. The abdomen has no traces either of 
segmentation or of pleopods or uropods. 
The colour is (in alcohol) reddish 
brown spotted with yellow. 
The specimen was fixed to the 
host (see fig. 13) quite as Holophryxus 
sp. (No. 83 b), but somewhat obliquely 
towards the right side of the host; 
there was a large spot as trace of the 
mouth of the parasite, and it may be 
seen, that this has changed its place 
4—5 times. 
No male was found. 
The space within the incubatory 
plates is quite filled with embryos. 
These are pale-yellow, 0,2 mm. long. 
On account of the colour a doser examination of the larvæ was im¬ 
possible without special preparation. But Prof. H. F. Junger¬ 
sen who has a great experience in preparatory-methods, has kindlv 
piepared for me some specimens with potash and pyrogallic acid; 
for this I owe him my best thanks, for otherwise I would not have 
been able to give good figures with all details. 
The larvæ are very like partly those of Dajus My sidis (G. O. 
8 ar s, Account vol. 2, PI. 94, larva), partly those of Clypeoniscus 
Meinertii (Giard et Bonnier, Buli. Scientifique France et Belgique, 
. vol. 25,1893, p. 421; Richard son, Monograph of Isopoda N.-America, 
Fig. 18. 
Holophryxus Acanthephyræ. 
The marks of the mouth 
and pereiopoda, and the 
carapace of Acanthepliyra 
with these marks. 
