igo9-j N. Annandale : The Indian Cirripedia Peduncidata. iig 



Dichelaspis cor , Aurivillius. 



D. cor, Aurivillius, "Stud. ii. Cirr," Kongl. Sv. Vet. Akad. Handl., xxvi, No. y, 

 p. 20, figs. I, 2 (1894). 



D. maindroni, Gruvel, Mono. Arch Mus. Paris (4), iv, p. 282, pi. iv, figs. 21 — 27, 

 pi. i, figs. 15, 16 (1902). 



D. coutierei, id., ibid., p. 289, pi. iv, figs. 28 — 32; Annandale, Illustr. Zool. 

 ''Investigator,'' Crust. Ent., pi. iv, figs. 4, 5 (1908). 



Capitulum heart-shaped, pointed above, gradually rounded at the base, with or 

 without the lines of growth marked on the surface, transparent or translucent ; the 

 surface often covered with minute, chitinous points; the membrane thick. Valves 

 three, sometimes five, narrow but stout. No definite ter gum, which is sometimes 

 represented, however, by an amorphous chitinous plate. Carina narrow, usually 

 curved, with transverse basal branches, which are turned upwards towards the scutum ; 

 the inner part of the lateral faces usually concave. Scutum with two branches or 

 segments, which are sometimes quite distinct from one another ; the occludent branch 

 or segment narrow, close to the occludent margin of the capitulum, sometimes expan- 

 ded and truncated at the tip, sometimes pointed, extending along the occludent margin 

 of the capitulum for the greater part of the length of the latter; basal branch or 

 segment slanting inwards and upwards, narrow and pointed or expanded at the 

 tip and truncated, its base more or less triangular. 



Peduncle usually longer than the capitulum, with or without chitinous points, 

 not or barely annula ted. 



Cirri, etc. — First pair of cirri close to the second or separated from it, very short 

 as a rule, but variable in this respect. All the cirri stout and rather short. The rami 

 of the first pair subequal, rather broad, barely longer than the pedicel, the joints 

 profusely covered with stout hairs. The posterior bunches of hairs well developed on 

 the posterior cirri. Anal appendages variable in length and armature, laterally 

 compressed, rounded at the apex, bearing a dense apical fringe of hairs, which 

 extends down the posterior margin to a different degree in different individuals. 

 Penis usually very stout, pointed, with the apex retro verted. In some individuals, 

 however, which are perhaps immature, it is slender, and .straight at the extremity. 



Mouth farts.— Labrum prominent but not buUate, without a row of chitinous 

 teeth above but minutely ornamented with chitinous points in some individuals. 

 Palp rather stout, bluntly pointed, bearing on the dorsal surface at the tip a fringe 

 of stout hairs and along the whole of the dorsal margin a more sparse fringe of similar 

 hairs. Mandible with five or six teeth (including the inner angle); all the teeth short 

 and proportionately broad at the base ; the first not much larger than and by no 

 means widely separated from the second ; the second, third, fourth and fifth sub- 

 equal ; the extra teeth, when present, smaller than the others, situated at the base 

 of the fifth ; a small projection also present at the base of the fourth ; the greater 

 part of the mandible covered with short, fine hairs. Maxilla without a definite exca- 

 vation although there is sometimes a very faint concavity between the first three 



