THE COPENHAGEN MUSEUM AND OTHEE SOURCES. 35 



Fam. LEUC0TH0IDJ3. 



Leucothoe INCISA, Robertson. (Plato 10.) 



1888. Leucotho'e farina Chcvreux (not Savigny), Bulletin do la Socirte cVetiulcs scientifiqucs de Paris, 



W annee, U"' sem., Extr. p. 9. 

 1892. Leucothoe incisa Robertson, Transactions of the Natural History Society of Glasgow, vol. iii. 



p. 217 (sep. copy, p. 23). 



The drawings of this species were made many years ago, hut have waited till now for 

 a suitable opportunity for publication. The species of Leucotlioe axe se^iarated by rather 

 fine distinctions. In 18G0 Boeck named a new species LeucofJioe LiUjehorgii, hut in his 

 later works he was willing to let this lapse as a synonym of the long known Leiicolhoii 

 spinicarpiis (Abildgaard). In 18S9 Norman gave the name imparicornis to a form from 

 Shetland, which Sars in 1892 determines to be the same as 'Boeck's I/Hljcborffli,, the latter 

 name having priority. To tliis species, as figured and described by Sars, Leucothoe incisa 

 makes a tolerably close approximation, yet it seems difficult to unite the two. In hicisa 

 tlie fourth side-plates have the front angle rounded, not acute; the first gnathopods have 

 the tip of the process of the fifth joint strongly hooked, the inner margin of the hand not 

 quite smooth but faintly crenulate, and the finger not very small; in the second 

 gnathopods the ^^alm is convex and faintly but broadly crenulate, the finger is not 

 abruptly bent at the base ; the tclson, instead of being little longer than broad, is fully 

 twice as long as broad, with the apex almost acute. As in Lllljehorgil, the inner margin 

 of the wi'ist in the first gnathopods is serrate, and the postero-lateral angles of the third 

 pleon-segment are sharply upturned, forming a sinus with the bulging hind margin. 

 There is a tendencj^ to this in the preceding segment. The mandibles have the cutting- 

 edge divided into about eight teeth ; the secondary plate on the left mandil)le is large, 

 witli ten teeth, that on the right is much slighter (Sai's denies its existence in this genus) ; 

 the second joint of the palp is not much longer tlian the narro'^v^er third. In tli(> maxil- 

 lipeds the first and second joints of the palp have the length and breadth subequal. 



Length not quite three-tenths of an inch. 



Taken off Cumbrae, in the Clyde, at low water and also in 20 fathoms, by Dr. David 

 Robertson, LL.D., F.L.S. 



Anamixis, n. g. 



Head hood-like. Eirst side-plates small, three following pairs very large. Eyes well 

 developed. First antennae attached below tlie apex of the head, witli elongate peduncle 

 and no secondary flagellum. Second antennae remote from the first, shorter and thinner, 

 Avith small flagellum. Mouth-organs (at least in the adult) degraded and abnormal. 

 Maxillipeds Avith the full number of joints, the third simple. First gnathopods delicately 

 chelate ; second massive, complexly subchelate ; the other limbs slight, normal. Branchial 

 vesicles small, simple. Pleopods small. First and second uropods biramous, third at 

 present unknoAvn. Telson simple. 



The shape of the head calls to mind the genus Bnlichia, the situation of the antennae 

 Plat ijiscUn opus, the size of the side-plates Metopa, themassiveness of the second gnatho- 

 pods Jlicrojjrotopus, the structure of both pairs of gnathopods and of the antenna) and 



