BRACHTUEA FROM TORRES STRAITS. 49 



resembles somewhat that of Porcellana, while the rudimentary exopod suggests a com- 

 parison -with the Tllpindea. The number and uniramous condition of the abdominal 

 appendages also agree, except for the absence of the sixth pair, witli tlie last-named 

 group. These resemblances, however, are balanced by numerous important differences, 

 so that even were we to set aside the evidence of the genital openings, it would lie 

 impossible to place the genera in any of the groups of Anomura. On tlie other hand, 

 the characters of the third maxillipeds and of the abdominal appendages and the greatly 

 enlarged buccal area are unlike anything found among the Brachyura. The resemblance 

 to the Pinnotheridae ajDpears to be quite superlicial. 



The characters usually relied upon to distinguish the various divisions of the Brachyura 

 have been in this case apparently so prof(Huidly modified by the pai'asitic habit of life, 

 that we can only regard these two genera as forming a family for the present incerke 

 sedis, for which the name Hapalocarcinidae will have to replace Mihie-Edwards's 

 " Lithoscaptes," the latter being based on a synonym of Cryptochlriis. 



LocaUtij. " Torres Straits." 



Distvlhution. Hapalucarcinus is recorded by name from Hawaii {Stimpson, Verrlll), 

 the Philippines, and (?) Bourbon {Semper). Coral-galls, possibly due to this species, arc 

 known from the Red Sea [Ehrenberg, Klunzlngev), Ceylon {Ven-iU), and the China 

 Sea {Bassett-Sndtlt). 



EXPLANATION OF THE PLATES. 

 Plate 1, 



Fig. 1. Filuiiinus cristipes, ii. sp., $ (enlarged). 



2. ,, „ ,, Cephalic region iroin below. 



3. „ ,, „ Right chela. 



4. Cri/fjiucnemtis Huddon'i, u. sp., $ . Dorsal view, x G. 



5. ,, „ ,, Ventral view. 

 C. ,, „ ,, Lateral view. 



7. ,, „ ,, 'I'hinl maxilli[)c(l, inner face. 



8. ,, ,, ,, Chela. 



9. Palicus Jiikesii (White), cj, x 5. 



10. „ ,, ,, Cephalic region from helow. 



11. ,, „ „ Abdomen. 



12. ,, „ ,, Second walking-leg from l)elow. 



13. ,, „ ,, First abdominal appendage. 

 SECOMJ SERIES. — ZOOLOGY, VOL. VIII. 



