302 ' PERCY SLADEN TRUST EXPEDITION 



Family Gobiidse. 

 Pakioglossus, gen. nov. 



Head and body strongly compressed ; head naked ; body covered with small scales. 

 Mouth terminal, protractile, very oblique ; prsemaxillaries with 6 canines, and with an 

 inner series of smaller teeth ; lower jaw with 4 or 5 canines on each side of the symphysis, 

 and with the lateral teeth smaller, uniserial. Gill-opening vertical, in front of base of 

 pectoral fin, not produced forward below. Two dorsals, the first of 6 spines, the second 

 of 16 or 17 rays; anal of a feeble spine and 15 soft rays; pel vies close together but 

 separate, each of a spine and 4 soft rays. 



In the length of the second dorsal and anal fins this genus is intermediate between 

 Allogohius, Waite, 1904 and the other Gobiid genera with only 4 soft rays in the pelvic 

 fin. Allogohius has large scales, 10 soft rays in the second dorsal and 8 in the anal, the 

 head only slightly compressed, and the mouth not very oblique. loglossus, Bean, 1882, 

 is nearer Parioglossus, but seems to differ in the wider gill-openings ; it has 22 to 24 rays 

 in the soft dorsal. Vireosa, Jord. and Snyder, 1901, has a mental bai'bel, and Oxyme- 

 poton, Bleek. and Orthostomus, Kner, are distinguished by having at least 30 rays in the 

 soft dorsal and anal. 



2. Parioglossus tceniatus, sp. n. 



Depth of body 6 in the length, length of head 5. Snout very short ; mouth nearly 

 vertical, the articulation of lower jaw below the anterior margin of eye ; diameter of eye 

 about f length of head. A dark band from eye to end of caudal fin ; dorsals and upper 

 edge of caudal dusky. 



Two examples, 25 and 30 mm. in total length, from the Pacard Lagoon, Aldabra, 

 The larger, probably a male, has the anal fin dark-edged and the dorsal fins higher, with 

 the rays more or less produced. 



Family Blenniidse. 



3. Salarias aldabrensis, sp. n. 



Depth of body less than length of head, 6 to 6^ in the length of the fish. Anterior 

 profile somewhat convex, nearly vertical ; mouth subterminal ; lower jaw with a pair of 

 canines; a short fringed tentacle above the eye. Dorsal xiii — xiv 21 — 23, low, notched, 

 not continuous with the caudal. Anal 28, long and low. Body pale, with several pairs 

 of violet cross-bars ; fins pale, the spinous dorsal dark-edged. 



Three specimens, 30 to 35 mm. in total length, from Dunes de Maistre, Aldabra. 

 These fishes " sit on the rocks at low tide." 



