REPORT ON THE AMPHIPODA. 167 



leg clavated, surmounteil by two Llunt teeth, and a large dentated curved claw directed 

 forwards. Immediately behind these legs arises, from the inferior part of each joint, the 

 bifurcate articulated appendages which are called fin-feet ; so that all the rings of the body 

 have either true or fin feet or styles articulated to them, in this respect differing from all 

 hitherto noticed genera. 



" This species swims with considerable rapidity and has all the habits of our common European 

 marine Gammari. Its size is about Jth of an inch, and its colour subject to but little 

 variety, being of a greenish tint more or less brownish in the specimens I have examined. 

 In its generic characters the great and disproportionate length of the 2 last pairs of feet, 

 the fin-feet arising from the succeeding joints, and the appearance presented by the antenna', 

 which are much longer than in the contiguous genera, at once distinguish it. The claws 

 also offer distinctions." 



In the above description, Templeton speaks of a minute first joint to the upper anteiuise, which 

 he very properly does not figure. He speaks of the lower antennas having joints much 

 longer than any of those of the superior, and again his figure contradicts his description. 

 By the extremely minute " first pair of legs " he evidently means the maxillipeds, what he 

 calls the second and third pairs being the two pairs of gnathopods. The third perasopods 

 are missing both from the figure and the description. It is curious that Templeton 

 should have thought his genus distinguished by having appendages to all the rings of the 

 body, since few genera of Amjshipods are without this characteristic, unless the telson be 

 counted as one of the rings. Milne-Edwards introduced the genus between Isxa and 

 Amphitoe, adopting Templeton's error as to the gnathopods, and not noticing his other 

 mistakes, unless obliquely in the words, " I'abdomeu ne parait offrir rien de particulier." 

 Spence Bate, in the Brit. Mus. Catal., p. 245 {Anisopus dubius, p. 145, by error in the 

 index), describes Templeton's species as Amphithoc duhia, adding that " this description 

 is taken from Templeton's figure, which is not well drawn," and that " if the telson (which 

 is neither figured nor described) should be found to be formed into a hook, then it 

 belongs to Siinamphithoe." As a matter of fact, fig. 7, on Plate xlii, of the Catalogue does 

 not fairly represent Templeton's figure, and since the generic distinction which separates 

 Sunamp>liitlwe from Ampliithoe is no longer the hooked telson, but the distal widening of 

 the fifth joint in the hinder perasopods, which Templeton expressly describes and very 

 clearly figures, the name Anisopms would have priority over Suiiampldthoe, had it not been 

 preoccupied among the Decapod Crustacea by de Haau, and also among Coleoptera, in 1835. 

 The species itself is probably the same as Sunamphitoe haimdus, Sp. Bate, 1856, but I do 

 not think that for such a negation of a name as dubius, any alteration should be made in 

 the commonly received nomenclatiu'e. In the figure the last uropods show the terminal 

 hooks which are characteristic of the Amphitlioinse. 



The next species is described as follows : — 



" Thaumalea depilis. tlate XX. fig. 2. Erythrocephalus melanophthalmus ? Tilesius, Neue 

 Ann. Wetterausch. i. p. 6. pi. xxi. a. fig. 5. 



" Body hyaline, with a few dark specks, especially along the edges of the abdominal plates or 

 rings. The head is quadrangular, not large ; the eyes deeply imbedded in it ; front retracted 

 inferiorly, from about its middle arise the superior antennw, which are short and tumid ; 

 1st joints short, forming together a truncated cone on which rests the elongate spindle- 

 shaped 4th joint. The inferior antennse arise from the inferior part of the frontal surface ; 

 they are much smaller than the superior, composed of 4 joints, of which the 1st is small 

 and obconic, the remainder in length subequal, the last conic. The body swells out tn 

 about the 5th ring, when it again becomes gradually reduced in size and ends in a bifurcate 

 articulated tail. There are only 6 legs apparent, the 2 first pairs being very short and 

 apparently without claws, the 4 posterior pairs of about equal lengtli, tapering, and with 



