1909.] N. ANNANDAI.E : The Indian Cirripedia Pedunculata. 115 



regards the amount of calcium salts they contain, present in the typical form. Carina 

 linear, arched (often irregularly), elbowed at the base but not forked, the basal branch 

 running parallel to and some little distance below the basal branch of the scutum. 

 Scutum consisting of two narrow branches which meet one another practically 

 at a right angle; the vertical branch broader and longer than the basal one, diverging 

 somewhat from the occludent margin of the capitulum above, pointed apically. Ter- 

 gum shaped like an axe with a somewhat slender handle, somewhat variable in exact 

 outline, very widely separated from the carina. 



PeduncIvE as a rule longer than the capitulum, cylindrical, slender, very soft. 



Cirri, etc. — Cirri rather short, not strongly curved ; pedicels long, in the second 

 pair equalling about one-fourth the length of the rami, which are practically equal. 

 The posterior cirri armed with a double row of moderately strong bristles down the 

 anterior margin and with small bunches of delicate, short hairs at the distal end of the 

 last four or five joints posteriorly. First cirrus with the two rami subequal; the distal 

 joint in each bearing two circles of stout bristles and all the other joints bearing several 

 somewhat irregular circles of similar but slighter bristles. Anal appendages very long 

 and slender, one- third to half as long as the sixth cirri, without joints or with five or 

 six more or less perfectly differentiated, ending in a bunch of short hairs of different 

 lengths and with a few scattered hairs on the posterior margin. Penis short and stout, 

 minutely ringed with circles of very minute chitinous processes, pointed, somewhat 

 curved at the tip , bearing scattered hairs all over and sometimes a long flagellum on 

 the dorsal surface. 



Mouth parts. — Lahrum more or less buUate, armed above with a row of fine, 

 minutely pointed teeth. Palpi blunt, sparsely hairy. Outer maxilla broadly and 

 regularly oval (except as regards the base), covered with scattered hairs externally. 

 Maxilla deeply excavated ; three long stout bristles external to the excavation ; 

 the edge internal to it somewhat sinuous, bearing several short stout bristles and 

 some smaller ones of different sizes ; a single slender bristle as a rule present at the 

 base of the excavation ; the body of the mandible covered with 

 short hairs, most of which are arranged in pairs transversely. 

 Mandible narrow, with five teeth ; the innermost very small and 

 close to the fourth ; the base of the large outer tooth bearing a 

 few scattered hairs ; the inner arm, which bears the four inner 

 teeth, covered with hairs arranged as on the maxilla. 



lyarge specimens measure about 5 mm. in capitular length. 



Var. pernuda, nov. 



Valves completely or almost absent ; no trace of the tergum ; 



the scutum, if present, represented only by the vertical branch , 



which is devoid of calcareous salts and barely even- chitinized ; 



the carina absent. The original five valves of the I^epadidse are ^ „ r.- , , 



,.^,. , .,^.,,. Fig. 8.—Dtchelaspis 



sometimes represented m outlme on the capitulum with their grayii var. permtda,-x 8 



lines of growth. 



