36 Mr. Thompson on an apparently undescribed 



Desc. Length, 2^ inches; sldn smooth; fin rays in num- 

 ber, D. 15 ; A. 10; P. 25 and 4; C. 15 (conspicuous, or 20 in 

 all,) = Br. 5. Head very broad posteriorly, thence to the snout 

 (which is truncated and 1^ line across*) sub-conical, occu- 

 pying rather more than J of the entire length ; from this part 

 to a little beyond the portion of the body above the termina- 

 tion of the ventral disk hkewise sub-conical ; thence to the 

 tail rather compressed and tapering : in advance of each eye 

 and on a line with its upper margin an extremely minute cir- 

 rus, hardly visible without a lens : eyes large, lateral, the 

 space between them twice their diameter, distant from snout 

 1|^ of their diameters, occupying j- the length of head: gape 

 wide, the lower jaw rather the shorter ; teeth pointed and 

 very numerous in both jaws, the outer ones of the upper jaw 

 the largest : gill opening small : pectoral fins placed just be- 

 hind it, and " extending downwards to the lower surface of 

 the body, where the rays [4 in number] become suddenly 

 stronger, and the membrane doubling forwards passes on to 

 unite with that of the opposite fin under the throat ; the mem- 

 branes of the pectorals thus united inclose a disk, and form 

 a [slight] hemispherical cavity ***** [but smaller and of 

 a different structure from that of L, Cornubiensis] formed by 

 the united ventrals :" dorsal fin originating behind the middle 

 of the entire length, and continued to near the caudal fin, 

 with which it is unconnected ; anal fin commencing nearer 

 the caudal, from which it is separate ; last ray of dorsal and 

 anal fins when laid close to the body reaching to the base of 

 the outer rays of caudal fin, their posterior rays about equal 

 in length to the depth of the body at their base ; caudal fin 

 occupying about ^ of the entire length, central rays longest ; 

 rays of all the fins articulated but not branched ; vent situated 

 midway between the posterior part of ventral disk and the 

 extremity of caudal fin : a short anal tubercle as in the genus 

 Gobius — this the L, Cornubiensis and L. bimaculatus also pos- 

 sess. 



Colour (in spirits) — entire upper surface, sides of head and 

 body, of an uniform dull flesh colour, (having been probably 



* 2\ lines in the specimen of L. Cornubiensis. 



