1909. J 



N. Annandai^e : The Indian Cirripedia Pedunculata. 



117 



Dichelaspis stella, sp. nov. 



Minute, transparent, the valves occupying a small part of the area of the capi- 

 tulum. 



Capitulum laterally compressed, with the occludent margin almost straight and 

 vertical and the carinal margin strongly arched ; with four 

 delicate, brittle valves ; a considerable area of apparently reti- 

 culate structure surrounding the umbo of each valve. Carina 

 linear, arched, extending more than half way up the capitulum, 

 forked at the base, the two branches of which are variable in 

 length, widely separated, almost parallel to one another and, 

 in another plane, to the basal branch of the scutum. Ter gum 

 small, in the shape of a four- rayed star, the uppermost ray of 

 which is usually shorter than the other three, while the lowest 

 is longer. Scutum consisting of two sublinear branches which 

 almost form a right angle, one being horizontal, the other ver- 

 tical ; the vertical branch considerably longer and broader than 

 the other. 



Peduncle naked, generally longer than the cajjitulum, 

 smooth, slender, very transparent. 



Cirri, etc. — First cirrus narrowly separated from second, 

 with both rami slender ; the anterior ramus slightly broader 

 than the posterior, and shorter by one joint ; the distal joint of 

 each bearing at its tip a circle of long, stout spines. Remaining cirri long and slender, 

 bearing numerous very long, slender hairs on the anterior margin of each joint and at 

 the tip of the distal joint. Anal appendages short, slender, barely reaching the distal 

 end of the basal joint of the sixth cirrus, bearing at their tip a bunch of long, fine 

 hairs, some of which are several times as long as the appendage ; the ])osterior margin 

 entirely bare. Penis; long and slender, apparently naked. 



Mouth parts. — Lahrum not buUate, with a row of minute, triangular, equal 

 teeth round its dorsal margin. Palp short, somewhat claw-shaped, bearing a fine 

 pencil of long hairs at its tip. Outer maxilla short and broad. Maxilla with a 

 somewhat narrow and shallow incisure about the middle of its biting edge ; external 

 to the incisure three stout spines, of which the outermost is the stoutest ; internal to 

 it about half-a-dozen more. 



This is a very small species, the capitulum in all that I have seen being less than 

 2 mm. in length. There is only one set of specimens in the Museum, however, and it 

 consists only of ten individuals, all of which were found on the gills of a single crab. 

 Possibly they are immature, for none of them contain eggs. The species is evidently 

 rare. 



Dichelaspis rhinoceros, sp. nov. 



Minute, transparent, with five translucent, brittle valves ; the scutum with three 

 branches ; the membrane thin. 



Fig. 10.— D. Stella, 

 X c. 27, with the terguni 

 of a second specimen. 



