No.l3(;9. XATVIiAL UISTORY OF THE IS< )l'< )l).{~Ul('ll ARDSOX. 



<>79 



Only a .single pair of pleopoda are present, which fold bark upon 

 the lower portion of the fifth pair of incubatory plates. 



From the oral area there extends on the ventral side a lono- pioccss, 

 which sul)divides and terminates in two lobes, one on 

 either sid(% beneath the incubatory lamelUv. 



The male (tio-. 38) has the head fused with the lirst 

 thoracic segment. The other six segments are free and 

 distinct. All the segments of the a})domen are consoli- 

 dated into one, which is somewhat oval and pointed pos- 

 teriorly. All seven pairs of legs are present, the first 

 pair being attached to the cephalic segment. The head 

 is large, concave on its dorsal surface, the anterior mar- 

 gin produced into a rounded process, which is directed 

 upward. Eves are wanting. There are no pleopoda 

 or uropoda. 



Only one specimen was obtained by the V . S. Fish 

 Commission steamer Albatross from the south coast of Oahu Island, 

 Hawaiian Islands, in 1902. The specimen was unattached. 



Ti/pe.—Odt. No. 28970, U.S.N.M. 



Fig. 33. — Zono- 



PHRYXfS KETRO- 

 DENS, MALK. ■, S. 



Family BOPYRID^. 



SublaiTiily E]Sr"rOr»H[ILi:N"JE. 



ENTOPHILUS Richardson, new genus. 



Type. — Entophiliis <)iiiiuttiCtus^\Q}aSi\'(\>iO\\.^ new species. 



Body of female rather as3'mmetrical. Dorsal surface with segmenta- 

 tion indicated by depressions more or less clearly defined. All seven 

 pairs of legs present. Marsupium bounded ventrally by five pairs of 

 incubatory lamellae Seven pairs of plates, overlapping the dorsal 

 surface and attached only to the bases of the legs, extend in two longi- 

 tudinal series, one on either side of the thorax; these plates probably 

 correspond to the epimeral plates. 



Two series of five plates each are present on either side of the abdo- 

 men, meeting along the median dorsal side and surrounding the al>do- 

 men at the sides, the lower plates neai-ly meeting again on the ventral 

 side in the median line. Terminal part of al)doni(Mi ti'unc-ate. 



Pleopoda consisting of five pairs of doul)le-branched laniclliv. Tro- 

 poda al)sent. 



Male with the six segments of the abdomen clearly and distinctly 

 defined, the last segment provided with a pair of single-i)ranch(>d uro- 

 poda; all the preceding segments of the abdomen provided with a pair 

 of single-branched well-developed pleopoda. Seven pairs of thoracic 

 legs attached to the seven thoracic segments. 



