﻿150 LEIDY ON THE MARINE INVERTEBRATE FAUNA OF 



70. Crangon septemspinosus, Say. Great Egg Harbor. Obtained by Mr. Ash- 

 mead. 



71. Gebia affinis, Say. Great Egg Harbor. Mr. Ashmead. 



72. Squilla empusa, Say. Newport. Obtained by Samuel Powell, Esq. 



73. Pycnogonon ? Point Judith. 



74. Caprella ? Point Judith. 



75. Caligus ? Attached to the fin of a shark. Great Egg Harbor. Ob- 

 tained by Mr. Ashmead. This and the preceding two crustaceans I have not had the 

 leisure to determine. 



76. Polyphemus occidentalis, Lam. Point Judith ; Absecom ; Great Egg Harbor, 

 In the latter locality in immense numbers. 



77. Ligia ? Point Judith. 



78. Limnoria terebrans, Leach. Absecom. 



79. Idotea irrorata, M. Edw. Point Judith ; Absecom ; Great Egg Harbor, 

 Numerous varieties, and in great abundance in the first mentioned place. 



80. Tdotea triloba, Say. Great Egg Harbor. • Obtained by Mr. Ashmead. 



81. Orchestia gryllus, Gould. Point Judith. Abundant. 



82. Cepon distortus, Leidy. (PI. XI. figs. 26 — 32.) Female. Body compressed 

 and distorted ovoid, white ; abdominal scales completely concealing the pinkish white 

 ova. Head prominent, provided with a pair of large oval disks situated posteriorly. 

 Mouth minute, at the summit of a trilobate papilla. Antennae very small and indis- 

 tinct. Divisions of the thorax posteriorly strongly costate. Feet in seven pairs, 

 curved forward and downward, ending in a short recurved, abortive hooklet. Abdo- 

 men deeply segmented. Branchial appendages lanceolate, fringed. Male. Body long 

 and slender, divided into fourteen segments. Head subrotund. Internal antenna? 

 short and robust, three jointed ; joints spinous. External antennas long, seven jointed ; 

 the first two joints spinous, the others bristled. First joint of the thorax transversely 

 oblong, the remainder depressed, pyriform in outline. Feet in seven pairs, the ante- 

 penultimate joint spinous, the penultimate joint broad and with the claw recurved. 

 Abdominal segments depressed, pyriform in outline, each provided with a pair of pe- 

 culiar ventral appendages, and, except the fifth one, with a lateral irregular pigment 

 cell. Caudal segment round, with a pair of divergent appendages. Length of female 

 four lines, breadth three lines ; length of male one and a quarter lines. Found in the 

 branchial cavity of Geldssimus pugilator, at Atlantic City. 



