76 
Memoirs of the Indian Museum. 
[Voi.. II, 
ramus reaching the base of the fourth joint from the tip of the anterior ramus ; 
both rami are pointed and tapering, with the last few joints very small, the anterior 
ramus having about i6 and the posterior ramus about 14 joints, but those at the base 
being imperfectly differentiated in each case and variable in this respect. The 
anterior ramus of the second cirrus is slightly longer than the posterior but each has 
about 30 joints. The first cirrus is not very widely separated from the second. There 
are four lateral appendages on each prosoma, two being very much longer than the 
others (which are sometimes almost rudimentary), and two at the base of each first 
cirrus, one of them on each side being very long and delicate. The penis is not so 
long as the sixth cirrus; it is slender, tapering to a point, minutely annulated, densely 
covered with soft hairs of irregular length, especially on the distal half ; there is a 
pencil of rather longer hairs at the tip. Anal appendages smooth, short, distinctly 
curved and claw-like. 
Mouth parTvS. — Lahrum moderately prominent. Maxilla with a deep excavation 
near the upper margin, from which it is separated by several long stout spines, one 
of which is particularly well developed. Below the excavation are three steps of 
somewhat variable proportions, each bearing a double row of stout bristles. Mandible 
with six teeth including the inner angle, which is pointed but rather stout and bears 
a dense fringe of short bristles on both edges. 
Lepas anatifera, Ifinné, subsp. indica, nov. 
Capitulum compressed, subtriangular, the apex being somewhat truncate ; the 
carinal margin arched, the occludent margin slightly sinuous. The valves thick, 
opaque, white, covered with a delicate, deep purple membrane arranged in sinuous par- 
allel bars corresponding with the lines of growth. This membrane is easily rubbed off 
and soon loses its colour in spirit. When worn it often 
persists as a line of square spots in a series of small 
depressions running down the capitulum from near the 
umbo of the tergum to that of the scutum in a curved 
line and growing larger in the middle of the line than they 
are at the ends. The valves are separated from one 
another by lines of purple or purplish membrane, which 
are sometimes rather broad towards the base of the 
scutum. Tergum broadly truncate at the apex; the 
occludent margin straight, slanting outwards, produced 
into a tooth at its junction with the scutal margin; 
about one-fourth as long as the scutal margin ; radiating 
ridges prominent, especially one running from the umbo 
to the occludent angle. Scutum quadrilateral (the scutal 
margin being distinct from the carinal margin), feebly 
convex even at the base ; the surface almost smooth 
except for a vertical ridge, which bears the same relation 
to the occludent margin as the homologous ridge does in 
Fig. 4. — Lepas anatifera 
sub-sp. indica, x 2J. 
