REPORT ON THE AMPHIPODA. 47 



Tidsskr., ser. 2, vol. i. p. 611, in describing the new species Anonux rjulomm, he remarks in 

 a note, " It is, however, possible that this species is not new. Fabricius' Oniscus cicada 

 seems in many, if not ia all, respects to come very near to it, and is obviously in any case 

 an Anonyx. By means of the Greenland name this doubt seems capable of solution, at least 

 if the name applies to but one species." With such testimony from Kr0yer himself, it 

 seems only just to reduce his Anonijx gidosus to a synonym of Anonyx cicada, 0. Fabricius. 

 It shares with the so-called Gainmarus arciicus, Scoresby, the reputation of exercising 

 extreme voracity upon dead seals. 



Oniscus ahyssinus, No. 236, Krciyer in 1838 identifies, though very hesitatingly, with his own 

 Amphithoe crenidata. Subsequently Kroyer united Amphithoi' crenulata and Amphithoe 

 inermis as the two sexes of one species, which Boeck places in his genus Pontogeneia, as 

 Ponfofjeneia inermis. 



Oniscus serratu-Sj'No. 237, Kr0yer, in 1838, Tena,ms6. AmpJiithoe seira, and afterwards Acantkonotus 

 serra. Boeck calls it AcantJionntozoma serratum, the generic names Acantlionoius, Owen, 

 and Verhimrms, White, to which this species had been successively assigned, being both 

 preoccupied. 



Oniscus arenarius. No. 234, is defined as " Oniscus cancriformis, antice depressiusculus, 

 postice carinato-subserratus, pedibus 4 anticis cheliformibus laevibiis, antennis subsequali- 

 bus," followed by Strom's definition in the synonymy, " Cancer mcicrourus articularis, 

 manihus adacfylis, dorso carinato serrafo, spinis cmidx hifidis. Act. Hafn. x. 5. Tab. ii. f. 

 1-8 et Miill. prodr. 23.581" The references imply that Amathilla homari, Fabr., 1779, 

 is intended, a species as to which Kr0yer, Gronl. Amph., expresses his surprise that one 

 so large should not have been noticed by Otto Fabricius. The name Oniscus arenarius is 

 preoccupied by Slabber. 



Oniscus Stroemianus, No. 235, is defined as " Oniscus cancriformis compressus, pedibus 4 anticis 

 cheliformibus subdentatis, antennis summis brevissimis," followed by Strom's definition. 

 Act. Hafn. ix. 588, Strum being spoken of as the discoverer. Strom's species is 

 identified by Boeck with Orchestia {littorea) gammareUus. 



1780. De Queeonic. 



Description d'un Insecte siugulier trouve dans la rade de Lomariaker. Mem. 

 de Math, et de phys. pres. a I'Academie Eoyale des Sciences, Paris ; Tom. IX. 

 Paris. M.DCC.LXXX., p. viii. and pp. 329-330. (Presente le 4 Juillet 1767.) 



The "insect" from Morbihan which he figures, and describes as Puce de nier arpenteuse, giving 

 the latter epithet from its mode of walking, is clearly the skull-headed skeleton shrimp, 

 Caprella acanthifera, Leach. Boeck says that de Qu^ronic "figures a Caprella which 

 seems to be the female of Cax>Tella linearis and a variety of it, which has been made a 

 separate species, Caprella acurninifera." This latter Mayer identifies with Caprdla 

 acanthifera., but inclines to regard de Querouic's species as the two sexes of Caprella tuher- 

 culata, Bate and Westwood. It is, however, only the Caprella acanthifera which has the 

 peculiar skull-like head figured by de Qui'ronic. There is nothing in his paper, either in the 

 description or the figures, which are here reproduced, that refers to more than a single form. 

 He draws it, indeed, in two postures, but without any intimation that the figures are taken 

 from more than one specimen. His actual words are, " Notre insecte est convert d'une 

 ecorce semblable a celle des Puces de mer, de meme consistance, et aussi d'un rouge lave, 

 sur-tout apres la mort de I'animal. C'est ce qui mo porteroit a lui donner le nom de Puce 

 de mer, auquel j'ajouterois celui d'arjmifeuse pour caracteriser sa raarche. La figure A, 

 represente I'animal de grandeur naturelle, et a-peu-pres dans I'attitude ou on I'a vu marcher. 



