scarcely studied at all. Finally he describes three stages of the pupae, mentioning their 

 want of internal structure during the first stage and their considerable growth, but he has 

 failed to understand their mouth, nor does he mention the possibility of a very different 

 development of the two sexes. He concludes with some reflections on the place which the 

 new form ought to occupy in the system, thinking — with good reason — that it »in keine 

 der bis jetzt aufgestellten Familien vollkommen hineinpasst« (p. 320), but that it is nearest 

 akin to the Lemmidce on account of similarity in the structure of the mouth, an opinion 

 which I cannot share (s. below). Salensky took his species at Naples on an Amphipod 

 which was many years after determined by Delia Valle as Microdeutopus gryttotalpa Costa. 

 About its occurrence on males as well as on females he has a statement (p. 302) which will 

 be mentioned later on in the part headed »Habitation, biology and distribution «. 



Mas Weber : Die Isopoden gesammelt wahrend der Fahrten des Willem Barents in 

 das nordliche Eismeer in den Jahren 1880 und 1881 (Bijdr. tot de Dierkunde, 1884). The 

 author informs us (p. 35) that in a vesicular swelling on the carapace of a specimen of 

 Hippolyte Gaimardii M. Edw. he found four globular bodies which contained either eggs or 

 larvae, and he thought they were » Bopyriden - Larven im ersten Larven- Stadium « and that 

 the eggs »werden wohl schubweise abgesetzt vom Weibchen und von einer gemeinsamen 

 Hiille umgeben«. His suggestion of Bopyrid-larvse is a great mistake; what he found were 

 the ovisacs of a Choniostoma. The statement is only of interest in so far as it indicates 

 a locality of the genus; the fact that this otherwise excellent author happens to be the 

 first who found such ovisacs appears more than valueless to me, considering how he explains 

 the matter, and I only mention it here, because it relates to my remarks in the criticism 

 of Giard and Bonnier. 



H. J. Hansen : Oversigt over de paa Dijmphna- Togtet indsamlede Krebsdyr (JDijmphna- 

 Togtets zool.-bot. Udbytte, 1887). In this paper (p. 271—278, Tab. XXIV, fig. 7— 7h), 

 I gave a detailed description of the female, of ova and larvae of a species found on Hippolyte 

 Gaimardii M. Edw. and Hipp, polaris (Sab.) in the Kara Sea, and I gave it the name of 

 Choniostoma mirabile. Furthermore, on this form I established a new family, Choniostomatidae ; 

 I did not know Salensky's paper at the time, but when Prof. G. 0. Sars had called my 

 attention to it, I mentioned it in the French resume worked out later on (p. 511); however, 

 I maintained my new genus. In the female I found antennulae, antennae and a mouth with 

 supposed mandibulae, the anterior branch of the maxillulse and the maxillae. The description 

 of the mouth is not quite correct, as I did not mention the membranous mouth-border, but 

 I found the hairs which I thought proceeded from the margin of the mouth; I also over- 

 looked the rudimentary maxillipeds, nor did I find the genital apertures. The description 

 of the larva is pretty correct on the whole, but I have with some hesitation mentioned four 

 joints instead of three in the antennulae, nor have I understood its olfactory seta as such. 

 In 1889 Giard and Bonnier were of the opinion that the specimen found by me on Hippolyte 

 polaris belonged to another species winch they called Choniostoma Hanseni; this opinion 



