582 THE VOYAGE OF H.M.S. CHALLEXGER. 



In the second group of the Corophiidfe, Elasmopus, Costa, is given as a synonym o 

 Podocerus, Leach, but afterwards in the fifth subfamily of the Gammarids as a synonym of 

 Mxra, Leach, to which it comes in fact much nearer. It is not easy to see why Micro- 

 deuiopus, Costa, and Autonoe, Bruz., should become synonyms of Aora, Kr0yer, while 

 Stimp)sonia, Sp. Bate, is retained as an independent genus. Cratippus, Sp. Bate, is of later 

 date than ColomaMx, Grubs. The preoccupied name Animpug, Templet., should rather 

 be assigned as a synonym to SunampliitJwe, Sp. Bate, than to Ampliithoe, Leach. The same 

 may be said of Pleonexes, Sp. Bate, since its type species, Pleonexes gammaroides, is almost 

 undoubtedly a Sunamphifhoe. Leptocheinis, Zaddach, should not be made a synonym of 

 Protmnedeia, Krpyer ; Boeck even put the two genera in different subfamilies. 



In Fam. 4. Icilinse, Dana, it should not be given as a generic character of Icilius that the second 

 uropods are longer than the third ; they are not so represented by Dana in the type species. 

 If Icridium, Grube, is the same as Pereionotus, Bate and Westwood, as most probably is the 

 case, the latter name has priority. In the definition of the family, the expression "die 

 beiden vorderen Beinpaare von den folgenden nicht formell abweichend " is inaccurate, 

 since, at least in Id/ius, the gnathopods have the third joint under-rid infj the wrist. 



In Fam. 5. Clydoninas, Dana, Clydonia, Dana, has recently been identified by BovaUius with 

 Tyro, M.-Edw. 



In Fam. 6. Gammaridse, Subfam. 1. Lysianassina (et Stegocephalina), Dana, an attempt, with 

 which most students will sympathise, is heroically made to reduce the number of genera, 

 by grouping several that Boeck has established, under earher names and comprehensive 

 definitions. But it seems hardly just to set aside without argument results at which Boeck 

 arrived by patient and laborious investigation. Moreover, rejected genera are very apt to 

 make their reappearance, when fresh research and the discovery of new species makes the 

 want of them felt, and then the earlier rejection has only the efiect of complicating the 

 synonymy. Many of Leach's genera were at one time thought superfluous, but are now 

 firmly established. On the other hand, comprehensive definitions such as that of 

 Paramphithoe by Bruzelius, are apt to introduce a confusion which it almost needs a 

 General Council to disentangle. The preoccupied Opis, Krpyer, has been altered by Boeck 

 into Opisa ; the definition here given does not suit Normania, Boeck, which is made 

 synonymous with it. Egidia, Costa, here given among the Lysianassina, is no doubt 

 synonymous with Urothoe, Dana, given later on among the Phoxina, Spi. Bate. Glycera, 

 Haswell, being preoccupied, has been altered to Glyceriria. 



In the second group of this subfamily, Andania, Boeck, is made a synonym of Stegocephalus, 

 Kr0yer, but I venture to think that a comparison of the mandibles shows such a combina- 

 tion to be impossible ; on what grounds Priscilla and Argissci, Boeck, are made synonyms 

 of Pontoporeia, Kroyer, I can still less understand, since the type species of these three 

 genera are strikingly different in outward form. 



In Subfam. 2. Phoxina, Sp. Bate, the definition begins with the words, " Kopf niedrig, 

 schnabelfdrmig ausgezogen, den Ursprung der oberen Fiihler kappenfiJrmig iiberdachend." 

 But the first genus assigned to the subfamily is Lepidatiylis, in which there is no such 

 hood-like prolongation of the head, the small acute rostrum being between the antennae. A 

 similar remark wUl apply to UrotJwe, of which indeed Gerstaecker himself says, " Kopf nur 

 kurz schnabelformig ausgezogen," as well as to Cheirocratus, Norman, which is here given 

 as a synonym of Lilljehorgia [rather Liljeborgia] Sp. Bate, although in fact it cannot in 

 classification be placed even beside it, if any attention be paid to the mouth-organs. 

 Acanthonotus, Owen, being preoccupied, has been altered by Boeck into Acanfhonotozoma. 



In Subfam. 5. Gammarina, Cressa, Boeck, which is given as a synonym of genus 37, Stenotho'e, 

 Dana, has been identified by G. O. Sars with Danaia, Sp. Bate. Mctopa, Boeck, a genus 

 in which there is a mandibular palp, is also given as a synonym of Stenotlwe, in which the 



