510 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



PLATE XXIV. 



FIG. 1. Right fifth pereiopoil of male of Alphcitx .taulcyi, var. brevicarpus, seen from outer side. 

 X33. 



FIG. 2. Small chela of malt' of A..inli'>ii, var. loHyicii.rpim. From No. 9, Table I. x33. 



FIG. 3. Small chela of male of A. .in ulci/ i, var. bri-rii-nrjutx. From No. 8, Table I. Compare with 

 the typical form of the other variety, shown in Fig. 2. x33. 



FIG. 4. First pleopod of male ol'.l. xiixli-i/i, fV;>m "loggerhead" sponge. x33. 



FIG. 5. Left first pleopod >( i'emale of .1. s<u;!<-yi, from 'loi^i'rlii'ad" sponge. A single egg is seen, 

 attached to three hairs of the. protopodite. The hairs are coated with glue, and the 

 gluey threads arc i vested into a chord, which is continuous with a thin sheet of this 

 . snl)st;!i;cc (ihe membrane of attachment or secondary egg-membrane which envelopes 

 the C.UM'I. Below is seen a single hair, from which an egg lias broken loose. Drawn 

 from 'iolic specimen. x33. 



FIG. 6. Right second plcopod of larger female of A. xnnli-iii. showing a number of eggs attached, 

 'i from behind, x 14. 



FIG. 7. First maxilla of A. xnnli-t/i.. Eudopodite bent out of position, to a point below the large 

 coxopodite. x04. 



FIG. 8. Large chela of female of A. xaiilci/i, from ''loggerhead" sponge. Compare with the brevi- 

 earpiix shown in PI. IV. x33. 



FIG. 9. Right second maxilla of A. mulcyi, seen from outer side. x64. 



